In 1908 Winkler gave the definition of apomixis as „den Ersatz der geschlechtlichen Fortpflanzung durch einen anderen, ungeschlechtlichen, nicht mit Kern- und Zellverschmelzung verbundenen Vermehrungsprozeß“. Apomixis is a derived stage occuring in species with sexual relatives in the same or related genera. There are two main groups of apomictic propagation in the Angiosperms, agamospermy (Täckholm 1922), i. e. the formation of seeds without a sexual process, and vegetative propagation by means of propagules such as bulbils or by runners, stolons and so on.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Åberg, E.: Viviparous forms of Agrostis. Ann. agric. Coll. Sweden 8, 461–463 (1940).Google Scholar
  2. Afzelius, K.: Embryologische und zytologische Studien in Senecio und verwandten Gattungen. Acta Hort. Berg. 8, 123–219 (1924).Google Scholar
  3. Die Embryobildung bei Nigritella nigra. Svensk bot. Tidskr. 22, 82-91 (1928).Google Scholar
  4. Zur Kenntnis der Fortpflanzungsverhältnisse und Chromosomenzahlen bei Nigritella nigra. Svensk bot. Tidskr. 26, 365-369 (1932).Google Scholar
  5. Apomixis in der Gattung Arnica. Svensk bot. Tidskr. 30, 572-579 (1936).Google Scholar
  6. Apomixis and polyembryony in Zygopetalum Mackayi Hook. Acta Horti Bergiani 19, 7-13 (1959).Google Scholar
  7. Akemine, T.: Chromosome studies on Hosta. I. The chromosome numbers in various species of Hosta. Hokkaido Imp. Univ., J. Fac. Sci. V 5(1), 25–32 (1935).Google Scholar
  8. Åkerberg, E.: Cytogenetic studies in Poa pratensis and its hybrid with Poa alpina. Diss. 1941; also in Hereditas (Lund) 28, 1–126 (1942).CrossRefGoogle Scholar
  9. Åkerberg, E., and S. Bingefors: Progeny studies in the hybrid Poa pratensis x Poa alpina. Hereditas (Lund) 39, 125–136 (1953).CrossRefGoogle Scholar
  10. Åkerberg, E., u. A. Nygren: Poa pratensis, trivialis, palustris, compressa und verwandte Arten. In: Handbuch der Pflanzenzüchtung, II. Aufl., S. 392-418. 1959.Google Scholar
  11. Almgård, G.: Experiments with Poa. I. Studies of Poa longifolia Trin. as a fodder grass and as a component in interspecific hybrids. Ann. roy. Agric. Coll. Sweden 26, 77–119 (1960a).Google Scholar
  12. Some Swedish results of breeding new Poa types. Proc. 8th int. Grassl. Congr. p. 71-73 (1960b).Google Scholar
  13. Experiments with Poa. II. Studies of Polyhaploid Poa-types. Ann. Agric. Coll. Sweden 30, 335-373 (1964).Google Scholar
  14. Experiments with Poa. III. Further studies of Poa longifolia Trin. with special reference to its cross with Poa pratensis L. Ann. Agric. Coll. Sweden 32, 3-65 (1966).Google Scholar
  15. Andersson, A.: Studien über die Embryologie der Familien Celastraceae, Oleaceae und Apocynaceae. Lunds Univ. Arsskr. 27(1), 1–112 (1931).Google Scholar
  16. Anderson, D.: Introgression in Texas species of Chloris (Graminae). Amer. J. Bot. 52, 647 (1965).Google Scholar
  17. Archibald, E.E. A.: The development of the ovule and seed of jointed cactus (Opuntia aurantiaca Lindley). S. Afr. J. Sci. 36, 195–211 (1939).Google Scholar
  18. Armstrong, J. M.: A cytological study of the genus Poa L. Canad. J. Res. C 15, 281–297 (1937).CrossRefGoogle Scholar
  19. Babcock, E. B.: The genus Crepis, Part I, 197 pp. 1947.Google Scholar
  20. Babcock, E. B., and G. L. Stebbins jr.: The American species of Crepis. Carnegie Inst. Wash., Publ. 504, 1–199 (1938).Google Scholar
  21. Bacchi, O.: Cytological observations in citrus. III. Megasporogenesis, fertilization, and polyembryony. Bot. Gaz. 105, 221–225 (1943).CrossRefGoogle Scholar
  22. Baker, H. G.: The agamic complex in Limonium (Sections Densiflorae and Dissiflorae Boiss.) Proc. VII. Int. Bot. Congr. 1954, p. 329-330.Google Scholar
  23. Apomixis and polyembryony in Pachira oleaginea (Bombaceae). Amer. J. Bot. 47, 296-302 (1960).Google Scholar
  24. Bally, W.: Zwei Fälle von Polyembryonie und Parthenokarpie. Verh. Schweiz. naturforsch. Ges. 98, 169–170 (1916).Google Scholar
  25. Bambacioni-Mezzetti, V.: Sullo sviluppo dell’embrione in Tulipa Gesneriana L. Ann. Bot. (Roma) 19, 145–155 (1932).Google Scholar
  26. Barlow, B. A.: A stage in the evolution of apomixis in Casuarina. Aust. J. Sci. 21, 108 (1958).Google Scholar
  27. Polyploidy and apomixis in the Casuarina distyla species group. Aust. J. Bot. 7, 238-251 (1959).Google Scholar
  28. Bashaw, E. C.: Apomixis and sexuality in buffelgrass (Pennisetum ciliare) (L) Link. Ann. Meet. Amer. Soc. Agr. Abstr. 1961, 47 (1961).Google Scholar
  29. Apomixis and sexuality in buffelgrass (Pinnisetum ciliare). Crop Sci. 2, 412-415 (1962).Google Scholar
  30. Bashaw, E.C., and B. J. Hoff: Effects of irradiation on apomictic common dallisgrass (Paspalum dilatatum). Crop Sci. 2, 501–504 (1962).CrossRefGoogle Scholar
  31. Bashaw, E. C., and E. C. Holt: Megasporogenesis, embryo sac development and embryogenesis in Dallisgrass, Paspalum dilatatum Poir. Agron. J. 50, 753–756 (1958).CrossRefGoogle Scholar
  32. Reproduction in dallisgrass, Paspalum dilatatum Abstr. Ann. Meet. Amer. Soc. Agron. Lafayette, Ind. 1958, 43 (1958).Google Scholar
  33. Bashaw, E. C., and D. J. Hutchison: Accessory chromosomes in Panicum coloratum. Canad. J. Genet. Cytol. 5, 281–289 (1963).Google Scholar
  34. Battaglia, E.: Fenomeni cirologici nuovi nella embriogenesi (“semigamia”) e nella microsporogenesi (“doppio nucleo di restituzione”) di Rudbeckia laciniata L. Nuovo Giorn. bot. ital. 52, 34–38 (1946 a).CrossRefGoogle Scholar
  35. Ricerche cariologiche ed embryologiche sul genere Rudbeckia (Aste-racea). I-VIII. Nuovo Giorn. bot. ital. 53, 1-69, 437-511 (1946b).Google Scholar
  36. La “Semigamia”, singolare comportamento del nucleo spermatico nelle uova diploidi delle specie apomittiche del genere Rudbeckia (Asteraceae) e consequente embriogenesi di tipi chimerico. R. C. Accad. Naz. Lincei VIII 2 (1), 63-67 (1947a).Google Scholar
  37. Ricerche cariologiche ed embryologiche sul genere Rudbeckia (Asteracea). IX-XII. Nuovo Giorn. bot. ital. 54, 377-431, 531-567 (1947b).Google Scholar
  38. Apomissia in Hieracium ramosum Waldst. et Kit. Atti Soc. Toscana Sci. Nat. 54, 1-11 (1947c).Google Scholar
  39. Sulla terminologia dei processi apomittici. Nuovo Giorn. bot. ital., Nuova Ser. 53, 23 pp. (1947d).Google Scholar
  40. Ricerche sulla parameiosi restiuzionale nel genere Taraxacum. Caryologia 1, 1-47 (1948).Google Scholar
  41. L’alterazione della meiosi nella reproduzione apomittica di Chondrilla juncea L. Caryologia 2, 23-30 (1949).Google Scholar
  42. L’alterazione della meiosi nella riproduzione apomittica di Erigeron karwinskianus DC. var. mucronatus DC. (Asteraceae). Caryologia 2, 165-204 (1950).Google Scholar
  43. Development of Angiosperm embryo sacs with nonhaploid eggs. Amer. J. Bot. 38, 718-724 (1951).Google Scholar
  44. Nuovi reperti di apomissia e di amfimissia nel genere Rudbeckia (Compositae). Atti Soc. Toscana Sci. Nat., Mem., B 59, 205-209 (1952a).Google Scholar
  45. Ricerche embriologiche su Rudbeckia columnaris Sims. Atti Soc. Toscana Sci. Nat., Mem., B 59, 172-197 (1952b).Google Scholar
  46. Utilizzazione di dati embriologici in funzione di una migliore conoscenza della sistematica del genere Rudbeckia (Compositae). Atti Soc. Toscana Sci. Nat., Mem., B 59, 217-221 (1952c).Google Scholar
  47. Ricerche embriologiche nel genere Arnica (Compositae). Atti Soc. Toscana Sci. Nat., Mem., B 59, 210-216 (1952d).Google Scholar
  48. The concepts of spore, sporogenesis and apospory. Phytomorphology 5, 173-177 (1955).Google Scholar
  49. Unusual cytological features in the apo-mictic Rudbeckia sullivantii Boynton et Beadle. Caryologia 8, 1-32 (1955).Google Scholar
  50. Do new types of embryo sac development occur in Antennaria carpatica? Phytomorphology 6, 119-123 (1956).Google Scholar
  51. Recent advances in the embryology of Angiosperms. Int. Soc. Plant Morph. Univ. Delhi 1963, 221-264.Google Scholar
  52. Bennett, H. W., and E. C. Bashaw: An interspecific hybrid in Paspalum. J. Hered. 51, 81–85 (1960).Google Scholar
  53. Berger, A.: Die Agaven. 288 pp. 1915.Google Scholar
  54. Berger, X.: Intersexe Bildungen in den Antheren partiell apomiktischer Rubusarten und Rubusbastarde. Z. Zellforsch. 38, 472–474 (1953).PubMedCrossRefGoogle Scholar
  55. Untersuchungen über die Embryologie partiell apomiktischer Rubusbastarde. Ber. Schweiz, bot. Ges. 63, 224-265 (1953).Google Scholar
  56. Bergman, B.: Zytologische Studien über die Fortpflanzung bei den Gattungen Leontodon und Picris. Svensk bot. Tidskr. 29, 155–301 (1935a).Google Scholar
  57. Zytologische Studien über sexuelles und asexuelles Hieracium umbellatum. Hereditas (Lund) 20, 47-64 (1935 b).Google Scholar
  58. Zur Kenntnis der Zytologie der skandinavischen Antennaria-Arten. Hereditas (Lund) 20, 214-226 (1935c).Google Scholar
  59. Eine neue apomiktische Antennaria. Svensk bot. Tidskr. 31, 391-394 (1937).Google Scholar
  60. Zur Embryologie der Gattung Erigeron. Svensk bot. Tidskr. 36, 429-443 (1942).Google Scholar
  61. A contribution to the knowledge of the embryo sac mother cell and its development in two apomicts. Svensk bot. Tidskr. 38, 249-259 (1944).Google Scholar
  62. Meiosis in two different clones of the apomictic Chondrilla juncea. Hereditas (Lund) 36, 297-320 (1950).Google Scholar
  63. On the formation of reduced and unreduced gametophytes in the females of Antennaria carpatica. Hereditas (Lund) 37, 501-518 (1951).Google Scholar
  64. Asyndesis in macrosporogenesis of diploid, triploid and tetraploid Chrysanthemum carinatum. Hereditas (Lund) 38, 83-90 (1952a).Google Scholar
  65. Chondrilla chondrilloides, a new sexual Chondrilla species. Hereditas (Lund) 38, 367-369 (1952b).Google Scholar
  66. Chromosome morphological studies in Chondrilla junceaiand some remarks on the microsporogenesis. Hereditas (Lund) 38, 128-130 (1952 c).Google Scholar
  67. Bergner, A. D.: Guayule with low chromosome numbers. Science 99, 224–225 (1944).PubMedCrossRefGoogle Scholar
  68. Polyploidy and eneuploidy in Guayule. U. S. Dept. Agr., Tech. Bull. 918, 1-36 (1946).Google Scholar
  69. Beth, K.: Untersuchungen über die Auslösung von Adventivembryonie durch Wundreiz. Planta (Berl.) 28, 296–343 (1938).CrossRefGoogle Scholar
  70. Billings, F. H.: Some new features in the reproductive cytology of angiosperms, illustrated by Isomeris arborea. New Phytologist 36, 301–326 (1937).CrossRefGoogle Scholar
  71. Bøcher, T. W.: Zur Zytologie einiger arktischen und borealen Blütenpflanzen. Svensk bot. Tidskr. 32, 346–361 (1938).Google Scholar
  72. Cytological studies of Arabis Holboellii Hörnern. Hereditas (Lund) 33, 573 (1947).Google Scholar
  73. Chromosome numbers of some arctic or boreal flowering plants. Medd. om Grønland 147 (6), 32 pp. (1950).Google Scholar
  74. Cytological and embryological studies in the amphiapomictic Arabis Holboellii complex. Kon. danske Vid. Selsk. Biol. Skr. 6 (7), 59 pp. (1951).Google Scholar
  75. Experimental taxonomical studies in the Arabis Holboellii complex. Svensk. bot. Tidskr. 48, 31-44 (1954).Google Scholar
  76. Böös, G.: Neue embryologiche Studien über Alchemilla arvensis (L.) Scop. Bot. Not. (Lund) 77, 209–250 (1924).Google Scholar
  77. Bogdan, A. V.: Breeding behaviour of Cenchrus ciliaris in Kenya. E. Afr. Agric. For. J. 26, 241 (1961).Google Scholar
  78. Borgaonkar, D. S.: Apomixis and speciation in the Bothriochloninae. Diss. Ohl. St. Coll. Stillwater. U.S.A. 1964, 25, No 64-8898, 762-63 (1964).Google Scholar
  79. Borgaonkar, D. S., J.R. Harlan, and J.M.J. de Wet: A study of apomictic mechanisms in the Bothriochloininae. Amer. J. Bot. 49, 674 (1962).Google Scholar
  80. Borgaonkar, D. S., and A. P. Singh: Species relationships in Dichantium. IV. D. annulatum and D. papillosumiPhyton (Argent.) 19, 101–107 (1962).Google Scholar
  81. Borgaonkar, D. S., and J. M. J. de Wet: A cytological of hybrids between Dichanthium annulatum and Dichanthium fecundum. Phyton (Argent.) 12, 137–144 (1960).Google Scholar
  82. Segregation among partial apomictic Bothriochloaihybrids. Amer. J. Bot. 48, 545 (1961).Google Scholar
  83. Cytological studies in some segregating population of hybrids within the Bothriochloininae. Cytologia (Tokyo) 28, 54-67 (1963).Google Scholar
  84. Cytogenetical study of hybrids between Dichanthium annulatumiand D. fecundumiIII. Phyton (Argent.) 21, 55-60 (1964).Google Scholar
  85. Bowden, W. M.: Diploidy polyploidy, and winter hardiness relationship in the flowering plants. Amer. J. Bot. 27, 357–371 (1940).CrossRefGoogle Scholar
  86. Bower, F. O.: On apospory in ferns. J. Linn. Soc. Bot. 21, 360–368 (1886).CrossRefGoogle Scholar
  87. Note on attempts to induce aposporous development in ferns. Ann. Bot. 4, 168-169 (1889).Google Scholar
  88. Braun, A.: Über Parthenogenesis bei Pflanzen. Abh. Kgl. Akad. Wiss. Berlin 1856, S. 311 bis 376 (1857).Google Scholar
  89. Über Polyembryonie und Keimung von Caelebogyne. Abh. Kgl. Akad. Wiss. Berlin 1859, S. 109-263 (1860).Google Scholar
  90. Brittingham, W. H.: An artificial hybrid between two species of bluegrass. J. Hered. 32, 57–63 (1941).Google Scholar
  91. Type of seed formation as indicated by the nature and extent of variation in Kentucky bluegrass, and its practical implications. J. agric. Res. 67, 225-264 (1943).Google Scholar
  92. Brooks, M. H.: A comparative study of the patterns of development in certain facultative apomicts. Proc. X. Int. Congr. Genetics, Montreal, 36 (1958).Google Scholar
  93. Brown, W. L.: Chromosome complements of five species of Poa with an analysis of variation in Poa pratensis. Amer. J. Bot. 26, 717–723 (1939).CrossRefGoogle Scholar
  94. The cytogenetics of Poa pratensis. Ann. Missouri bot. Garden 28, 493-522 (1941).Google Scholar
  95. Brown, W. V.: Apomixis in Zephyranthes texana Herb. Amer. J. Bot. 38, 697–701 (1951).CrossRefGoogle Scholar
  96. Apomixis as related to geographical distribution in the panicoid grass tribes. J. S. Afr. Bot. 24, 191-200 (1958).Google Scholar
  97. Brown, W. V., and W. H. P. Emery: Some South African apomictic grasses. J. South Afr. Bot. 23, 123–125 (1957a).Google Scholar
  98. Apomixis in the Graminae, tribe Andropogoneae: Themeda triandra and Bothriochloa ischaemum. Bot. Gaz. 118, 246-253 (1957b).Google Scholar
  99. Apomixis in the Gramineae: Panicoideae. Amer. J. Bot. 45, 253-263 (1958).Google Scholar
  100. Burton, G. W.: The method of reproduction in common Bahia grass, Paspalum notatum. J. Amer. Soc. Agron. 40, 443–452 (1948).CrossRefGoogle Scholar
  101. Conventional breeding of dallisgrass, Paspalum dilatatum Poir. Crop Sci. 2, 491-494 (1962).Google Scholar
  102. Burton, G. W., and I. Forbes: The genesis and manipulation of obligate apomixis in common Bahia grass (Paspalum notatum Flugge). Proc. 8th Int. Grassl. Congr. Reading, 1960, p. 66-71.Google Scholar
  103. Burton, G.W., and Ian Forbes jr.: Cytology of diploids, natural and induced tetraploids and intraspecies hybrids of Bahiagrass, Paspalum notatum Flügge. Crop Sci. 1, 6, 402–406 (1961).CrossRefGoogle Scholar
  104. Carano, E.: Nuovo ricerche sulla embriologia delle Asteraceae. Ann. Bot. (Roma) 15, 97–196 (1921).Google Scholar
  105. Sul particolare sviluppo del gametofito ♀ di Euphorbia dulfis L. R. C. Accad. Lincei, Cl. Sci. fis., mat. e nat., Ser. Via 1, 633 (1925).Google Scholar
  106. Ulteriori osservazioni su Euphorbia dulcis L., in rapporto col suo comportamento apomittico. Ann. Bot. (Roma) 17, 50-79 (1926).Google Scholar
  107. Carnahan, H. L., and D. Helen Hill: Cytology and genetics of forage grasses. Bot. Rev. 27, 1–162 (1961).CrossRefGoogle Scholar
  108. Carr, D. J., and Eng Kok Ng: Experimental induction of flower formation in Kikuyu grass (Pennisetum clandestinum Hochst.). Austr. J. agric. Res. 7, 1–6 (1956).CrossRefGoogle Scholar
  109. Catcheside, D. G.: The B-chromosomes of Parthenium argentatum. Heredity 1, 393–394 (1947).CrossRefGoogle Scholar
  110. The B-chromosomes of Parthenium argentatum. Genet. Iber 2, 139-148 + 1 pl. (1950).Google Scholar
  111. Celarier, R. P.: The cyto-geography of the Bothriochloa ischaemumicomplex. II. Chromosome behaviour. Amer. J. Bot. 44, 729–738 (1957).CrossRefGoogle Scholar
  112. Celarier, R. P., and J. R. Harlan: Apomixis in Bothriochloa, Dichanthium and Capillipedium. Phytomorphology 7, 93–102 (1957).Google Scholar
  113. Celarier, R. P., K. L. Mehra, and M. L. Wulf: Cytogeography of the Dichanthium annulatum complex. Brittonia 10, 59–72 (1958).CrossRefGoogle Scholar
  114. Cesca, G.: Richerche cariologiche ed embriologiche sulle Euphorbiaceae. I Su alcuni biotipi di Euphorbia dulcis L. della Toscana. Caryologia 14, 79–96 (1961).Google Scholar
  115. Chase, S. S.: Selection for parthenogenesis and monoploid fertility in maize. Genetics 37, 573–574 (1952).Google Scholar
  116. Chedda, H. R., and J. R. Harlan: Chromosomal evolution and genome building in Bothriochloininae. Niger. agric. J. 1, 18–21 (1964).Google Scholar
  117. Chiarugi, A.: Aposporia e apogamia in “Artemisia nitida” Bertol. Nuovo Giorn. bot. ital., Nuova Ser. 33, 501–626 (1926).Google Scholar
  118. Chiarugi, A., e E. Francini: Apomissia in “Ochna serrulata” Walp. Nuovo Giorn. bot. ital., Nuova Ser. 37, 1–250 (1930).CrossRefGoogle Scholar
  119. Christen, H. R.: Untersuchungen über die Embryologie pseudogamer und sexueller Rubusarten. Ber. Schweiz. bot. Ges. 60, 153–198 (1950).Google Scholar
  120. Die Embryologie von Rubus idaeus und von Bastarden zwischen Rubus caesius und Rubus idaeus. Z. indukt. Abstamm.-u. Vererb.-Lehre 84, 454-461 (1952).Google Scholar
  121. Christoff, M.: Über die Fortpflanzungsverhältnisse bei einigen Arten der Gattung Hieracium nach einer experimentell induzierten Chromosomen Vermehrung. Planta (Berl.) 31, 73–90 (1940).CrossRefGoogle Scholar
  122. Die genetische Grundlage der apomiktischen Fortpflanzung bei Hieracium aurantiacum. Z. indukt. Abstamm.-u. Vererb.-Lehre 80, 103-125 (1942).Google Scholar
  123. Christoff, M., and M. A. Christoff: Meiosis in the somatic tissue responsible for the reduction of chromosome number in the progeny of Hieracium Hoppeanum Schult. Genetics 33, 36–42 (1948).Google Scholar
  124. Christoff, M., u. G. Papasova: Die genetischen Grundlagen der apomiktischen Fortpflanzung in der Gattung Potentilla. Z. indukt. Abstamm.-u. Vererb.-Lehre 81, 1–27 (1943).CrossRefGoogle Scholar
  125. Christoff, M., u. A. Popoff: Cytologische Studien über die Gattung Hieracium. Planta (Berl.) 20, 440–447 (1933).CrossRefGoogle Scholar
  126. Christoff, M. A.: Embryologische Studien über die Fortpflanzung einiger Poa-Arten. Jb. Univ. Heil. Klim. Ochrid, Sofia, Fak. Land.-u. Forstwirtsch. 20, 169–178 (1942).Google Scholar
  127. Die Polyembryonie als Ursache für die Variabilität in den apomiktischen Arten der Gattung Poa. Jb. Univ. Heil. Klim. Ochrid, Sofia, Fak. Land.-u. Forstwirtsch. 22, 153-179 (1944).Google Scholar
  128. Clausen, J.: Stages in the evolution of plant species. 206 pp. 1951.Google Scholar
  129. Introgression facilitated by apomixis in polyploid Poas. Euphytica 10, 87-94 (1961).Google Scholar
  130. Clausen, J., P. Grun, W.M. Hiesey and M. Nobs: New Poa hybrids. Carnegie Inst. Wash., Year Book 51, 111–117 (1952).Google Scholar
  131. Clausen, J., P. Grun, A. Nygren and M. Nobs: Genetics and evolution of Poa. Carnegie Inst. Wash., Year Book 50, 109–111 (1951).Google Scholar
  132. Clausen, J., W. M. Hiesey, P. Grun and M. Nobs: Survey of the range-grass program. Carnegie Inst. Wash., Year Book 51, 107–111 (1952).Google Scholar
  133. Clausen, J., W. M. Hiesey and M. A. Nobs: The Poa program. Carnegie Inst. Wash., Year Book 52, 170–173 (1953).Google Scholar
  134. Poa investigations. Carnegie Inst. Wash. Year Book 54, 172-175 (1955).Google Scholar
  135. Studies in Poa. Carnegie Inst. Wash., Year Book 55, 236-239 (1956).Google Scholar
  136. Contrasting tolerance ranges of apomictic species and hybrids of Poa. Carnegie Inst. Wash., Year Book 56, 293-295 (1957).Google Scholar
  137. Studies in Poa hybridization. Carnegie Inst. Wash. Year Book 61, 325-333 (1962).Google Scholar
  138. Clausen, J., D. Keck and W.M. Hiesey: Experimental studies on the nature of species. I. Effect of varied environments on western North American plants. Carnegie Inst. Wash. Publ. 520, 1–452 (1940).Google Scholar
  139. Experimental studies on the nature of species. II. Plant evolution through amphiploidy and autoploidy, with examples from the Madiinae. Carnegie Inst. Wash., Publ. 564, 1-174 (1945).Google Scholar
  140. Experimental taxonomy. Carnegie Inst. Wash., Year Book 46, 95-104 (1947).Google Scholar
  141. Experimental taxonomy. Carnegie Inst. Wash., Year Book 47, 105-110 (1948).Google Scholar
  142. Clausen, J., D. Keck, W. M. Hiesey and P. Grun: Experimental taxonomy. Poa investigations. Carnegie Inst. Wash., Year Book 48, 97-103 (1949).Google Scholar
  143. Experimental taxonomy. Poa investigations. Carnegie Inst. Wash., Year Book 49, 104-107 (1950).Google Scholar
  144. Clausen, J., D. Keck, W. M. Hiesey, P. Grun, A. Nygren and M. Nobs: Climatic tolerances of Poaispecies and hybrids. Carnegie Inst. Wash., Year Book 50, 105–108 (1951).Google Scholar
  145. Clausen, J. C., M. A. Nobs, and W. M. Hiesey: Studies in Poa. Carnegie Inst. Wash. Year Book 60, July 1, 1960–June 30, 384-385 (1960/61).Google Scholar
  146. Clifford, H. T.: Vivipary in Eleusine indica (L.) Gaertn. Nature (Lond.) 184, 1888 (1959).CrossRefGoogle Scholar
  147. Coe, G. E.: Cytology of reproduction in Cooperia pedunculata. Amer. J. Bot. 40, 335–343 (1953).CrossRefGoogle Scholar
  148. Cooper, D. C., and R. A. Brink: The endospermembryo relationship in an autonomous apomict, Taraxacum officinale. Bot. Gaz. 3, 139–153 (1949).CrossRefGoogle Scholar
  149. Coulon, J. de: Nardus strictaiÉtude physiologique, anatomique et embryologique. Mém. Soc. Vaud. Sci. Natur. No 6, 247–442 (1923).Google Scholar
  150. Cox, L. M., and J. Clausen: Chromosome numbers of hybrid Poailines. Carnegie Inst. Wash., Year Book 54, 175–177 (1955).Google Scholar
  151. Crane, M. B., and P. T. Thomas: Segregation in asexual (apomictic) offspring in Rubus. Nature (Lond.) 143, 684 (1939).CrossRefGoogle Scholar
  152. Curtis, W.M.: Variation in certain Tasmanian plants. New Phytologist 51, 398–414 (1952).CrossRefGoogle Scholar
  153. Czapik, R.: Badania embriologiczne nad rodzajem Potentilla L. II. P. arenaria. Embryological studies in the genus Potentilla L. II. Potentilla arenaria. Acta biol. cracov. 5, 29–42 (1962).Google Scholar
  154. Badania embriologiczne nad rodzajem Potentilla L. III. Mieszańce miedzy P. Crantzii i P. arenaria. Embryological studies in PotentillaiL. III. Hybrids between P. Crantzii and P. arenaria. Acta biol. cracov. 5, 43-61 (1961).Google Scholar
  155. D’Amato, F.: Apomissia in Statice oleaefolia Scop. var. confusa Goodr. (Plumbaginaceae). Nuovo Giorn. bot. ital. 47, 504 (1940).Google Scholar
  156. Risultati di una Carioembriologica in una populazione di Nothoscordum fragrans Kunth. Caryologie 1, 194-200 (1949 a).Google Scholar
  157. Triploidia e apomissa in Statice oleaefolia Scop. var. confusa Goodr. Caryologia 2, 71-84 (1949b).Google Scholar
  158. Darlington, C. D., and E. K. Janaki-Ammal: Chromosome atlas of cultivated plants. 397 pp. 1945.Google Scholar
  159. Darlington, C. D., and A. P. Wylie: Chromosome atlas of flowering plants. 519 pp. London 1955.Google Scholar
  160. De Lisle, D. G.: Chromosome numbers in Cenchus (Graminae). Amer. J. Bot. 51, 1133–1134 (1964).CrossRefGoogle Scholar
  161. Dermen, H.: Aposporic parthenogenesis in a triploid apple, Malus hupehensis. J. Arn. Arb. 17, 90–105 (1936).Google Scholar
  162. Desai, Sharda: Studies on apospory in Skimmia. Phyton (Argent.) 16, 147–152 (1961).Google Scholar
  163. Dewald, C.L., and J.R. Harlan: Stigma removal studies on certain accessions of Bothriochloa intermedia and Dichanthium annulatum. Crop Sci. 1, 15–17 (1961).CrossRefGoogle Scholar
  164. de Wet, J.M. J.: Chromosome numbers of a few South African grasses. Cytologia (Tokyo) 19, 97–103 (1954).Google Scholar
  165. Additional chromosome numbers in Transvaal grasses. Cytologia (Tokyo) 23, 113-118 (1958).Google Scholar
  166. de Wet, J. M. J., and D. S. Borgaonkar: Aneuploidy and apomixis in Bothriochloa and Dichantium. Bot. Gaz. 124, 437–440 (1963).CrossRefGoogle Scholar
  167. De Wet, J. M. J., D. S. Borgaonkar, and W. L. Richardson: Chromosome number and mode of reproduction in the Bothriochloininae. Caryologia 16, 47–55 (1963).Google Scholar
  168. de Wet, J.M. J., and J.R. Harlan: Role of apomixis in the evolution of the Bothriochloa-Dichanthium complex. Crop Sci. 3, 314–316 (1963).CrossRefGoogle Scholar
  169. Morphology of the compilospecies Bothriochloa intermedia. Amer. J. Bot. 53, 94-98 (1966).Google Scholar
  170. De Wet, J. M. J., and M. L. Higgins: Species relationships within the Bothriochloa pertusa complex. Phyton (Argent.) 20, 205–211 (1963).Google Scholar
  171. Cytology of the Bothriochloa pertusa complex (1964).Google Scholar
  172. De Wet, J. M. J., and W. L. Richardson: Morphological variation and species relationships in Dichantium. Phyton (Argent.) 20, 19–28 (1963).Google Scholar
  173. De Wet, J. M. J., and B.D. Scott: Essential oils as taxonomic criteria in Bothriochloa. Bot. Gaz. 126, 209–214 (1965).CrossRefGoogle Scholar
  174. De Wet, J. M. J., and A. P. Singh: Species relationships in Dichantium V. The diploid species. Caryologia 17, 153–160 (1964).Google Scholar
  175. Diannelidis, T.: Über das spontane Vorkommen von diploidem Allium carinatum. Öst. bot. Z. 93, 66–72 (1936).CrossRefGoogle Scholar
  176. Dodds, K.S.: Polyhaploids in Solanum demissum. Nature (Lond.) 166, 795 (1950).CrossRefGoogle Scholar
  177. Dodds, K. S., and N. W. Simmonds: Genetical and cytological studies of Musa. IX. The origin of an edible diploid and the significance of interspecific hybridization in the banana complex. J. Genet. 48, 285–292 (1948).PubMedCrossRefGoogle Scholar
  178. The cytogenetics of bananas. Proc. VIII. Int. Congr. Genet. Hereditas (Lund) Suppl. Vol. 35, 262 (1949).Google Scholar
  179. Dowrick, G. J.: Biology of reproduction in Rubus. Nature (Lond.) 191, 680–682 (1961).CrossRefGoogle Scholar
  180. Druery, Ch. T.: Observations on a singular mode of development in the Lady-Fern (Athyrium Filixfoemina). J. Linn. Soc. Bot. 21, 354–357 (1886a).CrossRefGoogle Scholar
  181. Further notes on a singular mode of reproduction in Athyrium Filix-foemina, var. clarissima. J. Linn. Soc. Bot. 21, 358-360 (1886b).Google Scholar
  182. Duara, B. N., and G. L. Stebbins, jr.: A polyhaploid obtained from a hybrid derivative of Sorghum halepense x S. vulgare var. sudanense. Genetics 37, 369–374 (1952).PubMedGoogle Scholar
  183. Duich, J. M., and H. B. Musser: The extent of aberrants produced by Merion Kentucky bluegrass, Poa pratensis L., as determined by first and second generation progeny tests. Agronomy J. 51, 421–424 (1959).CrossRefGoogle Scholar
  184. Edman, G.: Apomeiosis und Apomixis bei AtrapJiaxis frutescens C. Koch. Acta Horti Berg. 11, 13–66 (1931).Google Scholar
  185. Ehrenberg, L.: Kromosomtalen hon några kärlväxter. Bot. Not. (Lund) 98, 430–437 (1945).Google Scholar
  186. Einset, J.: Chromosome studies in Rubus. Gents Herb. 7, 181–192 (1947).Google Scholar
  187. Apomixis in American polyploid blackberries. Amer. J. Bot. 38, 768-772 (1951).Google Scholar
  188. Ekman, E.: Notes on some Greenland Antennariae. Svensk bot. Tidskr. 21, 49–57 (1927).Google Scholar
  189. Emery, W. H. P.: A study of reproduction in Setaria macrostachya and its relatives in the southwestern United States and northern Mexico. Bull. Torrey Bot. Club 84, 106–121 (1957).CrossRefGoogle Scholar
  190. Emery, W. H. P., and W. V. Brown: Apomixis in the Graminae. Tribe Adropogoneae: Heteropogon contortus. Madrano 14, 238–246 (1958).Google Scholar
  191. Engelbert, V.: Reproduction in some Poa species. Canad. J. Res. C 18, 518–521 (1940).CrossRefGoogle Scholar
  192. The development of twin embryo sacs, embryos and endosperm in Poa arctica R. Br. Canad. J. Res. C 19, 135-144 (1941).Google Scholar
  193. Erlandsson, S.: The chromosome numbers of some Taraxacum species. Bot. Not. (Lund) 92, 261–264 (1939).Google Scholar
  194. Ernst, A.: Bastardierung als Ursache der Apogamie im Pflanzenreich. 666 pp. 1918.Google Scholar
  195. Addenda, Corrigenda und Desiderata zur Genetik des amphidiploiden Artbastardes Primula kewensis. Arch. Klaus-Stift. Vererb.-Forsch. 24, 1-104+2 pl (1949).Google Scholar
  196. Resultate aus Kreuzungen zwischen der tetraploiden. monomorphen Primula japonica und diploiden, mono-und dimorphen Arten der Sekton Candelabra. Arch. Klaus-Stift. Vererb.-Forseh. 25, 135-236 + 4 pl (1950).Google Scholar
  197. “Maternal hybrids” nach interspezifischen Bestäubungen in der Gattung Primula. 1. Sekton Candelabra. Arch. Klaus-Stift. Vererb.-Forsch. 26, 1-96 + 2 pl. (1951a).Google Scholar
  198. “Maternal hybrids” nach interspezifischen Bestäubungen in der Gattung Primula. 2. Sekton Farinosae. Arch. Klaus-Stift. Vererb.-Forsch. 26, 187-322 + 2 pl. (1951b).Google Scholar
  199. Ernst, A., u. Ch. Bernhard: Entwicklungsgeschichte des Embryosackes und des Embryos von Burmannia Candida Engl. und B. Championii Thw. Ann. Jard bot. Buitenzorg II 10, 161-188 (No 9 in Beiträge zur Kenntnis der Saprophyten Javas) (1912).Google Scholar
  200. Esau, K.: Apomixis in Guayule. Proc. nat. Acad. Sci. (Wash.) 30, 352–355 (1944).CrossRefGoogle Scholar
  201. Morphology of reproduction in Guayule and certain other species of Parthenium. Hilgardia 17, 61-101 (1946).Google Scholar
  202. Fagerlind, F.: Embryologische, zytologische und bestäubungsexperimentelle Studien in der Familie Rubiaceae nebst Bemerkungen über einige Polyploiditätsprobleme. Acta Horti Berg. 2, 195–470 (1937).Google Scholar
  203. Zytologie und Gametophytenbildung in der Gattung Wikstroemia. Hereditas (Lund) 26, 23-50 (1940).Google Scholar
  204. Die Samenbildung und die Zytologie bei agamospermischen und sexuellen Arten von Elatostoma und einigen nahestehenden Gattungen nebst Beleuchtung einiger damit zusammenhängender Probleme. Kung. Svensk Vet.-Akad. Handl. 21 (4), 1-130 (1944).Google Scholar
  205. Bildung und Entwicklung des Embryosacks bei sexuellen und agamospermischen Balanophora-Arten. Svensk bot. Tidskr. 39, 65-82 (1945).Google Scholar
  206. Sporogenesis, Embryosackentwicklung und pseudogame Samenbildung bei Rudbeckia laciniata L. Acta Horti Berg. 14, 39-90 (1946).Google Scholar
  207. Macrogametophyte formation in two agamospermous Erigeron species. Acta Horti Berg. 14, 221-247 (1947 a).Google Scholar
  208. Makrosporogenese und Embryosackbildung bei agamospermischen Taraxum-Biotypen. Svensk bot. Tidskr. 41, 365-390 (1947 b).Google Scholar
  209. Farquharson, L. I.: Apomixis and polyembryony in Tripsacum dactyloides. Amer. J. Bot. 42, 737–743 (1955).CrossRefGoogle Scholar
  210. Faruqi, S. A.: The significance of apomixis in evolution and speciation of the Bothriochloinae. Biologia (Lahore) 9, 57–64 (1963).Google Scholar
  211. Cytogenetic studies of the Bothriochloa intermedia complex. Cytologia (Tokyo) 29, 280-297 (1964a).Google Scholar
  212. Cytogeography of the Bothriochloa intermedia complex. Diss. Oklah. St. Coll. Stillwater. U.S.A. Abstr. 25, No 64-8915, 774-775 (1964b).Google Scholar
  213. Fernald, M.L.: Some Antennarias of northern New England. Rhodora 1, 71–75 (1899).Google Scholar
  214. Recent discoveries in the Newfoundland flora. Rhodora 35 (Festuca proliféra, p. 133-136; Antennaria, p. 327-346) (1933).Google Scholar
  215. Memoranda on Antennaria. Rhodora 38, 229-231 (1936).Google Scholar
  216. Fisher, W. D., E. C. Bashaw and D. C. Holt: Evidence for apomixis in Pennisetum ciliare and Cenchrus setigerus. Agron. J. 46, 401–404 (1954).CrossRefGoogle Scholar
  217. Flovik, K.: Cytological studies of arctic grasses. Hereditas (Lund) 24, 265–376 (1938).CrossRefGoogle Scholar
  218. Chromosome numbers and polyploidy within the flora of Spitzbergen. Hereditas (Lund) 26, 430-440 (1940).Google Scholar
  219. Focke, W. O.: Die Pflanzenmischlinge. 569 pp. Berlin 1881.Google Scholar
  220. Forenbacher, A.: Die Fortpflanzungsverhältnisse bei der Gattung Potentilla. Jugoslav. Akad. Znanosti i unjetnosti, Zagreb Izvjesca o raspravama matem. prirod. Razreda 1, 86–97 (1914). Cit. after Schnarf 1929.Google Scholar
  221. Fries, Th. C. E.: Antennaria alpina (L.) Gaertn. och dess skandinaviska elementararter. Svensk bot. Tidskr. 13, 179–193 (1919).Google Scholar
  222. Frost, H. B.: Polyembryony, heterozygosis and chimeras in citrus. Hilgardia 1, 365–402 (1926).Google Scholar
  223. Fürnkranz, D.: Cytogenetische Untersuchungen an Taraxacum im Räume von Wien. Öst. bot. Z. 107, 310–350 (1960).CrossRefGoogle Scholar
  224. Cytogenetische Untersuchungen an Taraxacum im Raume von Wien. 11. Hybriden zwischen T. officinale und T. palustre.Google Scholar
  225. Öst. bot. Z. 108, H. 4/5, 408-415 (1961).Google Scholar
  226. Fultz, J. L.: Somatic chromosome complements in Bouteloua. Amer. J. Bot. 29, 45–55 (1942).CrossRefGoogle Scholar
  227. Furusato, K.: Genetics and breeding of Citrus. Nat. Inst. Genet. (Japan) Ann. Rep. 1951, 41 (1952).Google Scholar
  228. Tetraploidy in Citrus. Nat. Inst. Genet. (Japan) Ann. Rep. No 3, 51-52 (1952).Google Scholar
  229. Abnormal growth of Citrus trees caused by deviating chromosome numbers in the grafting stocks. Nat. Inst. Genet. (Japan) Ann. Rep. No 3, 52-53 (1952).Google Scholar
  230. Studies on the polyembryony in Citrus. Jap. J. Genet. 28, 165-166 (1953).Google Scholar
  231. Studies on polyembryony in Citrus. Nat. Inst. Genet. (Japan) Ann. Rep. No 4, 56 (1953).Google Scholar
  232. Inheritance of mono and polyembryony in Citrus. Ann. Rep. Nat. Inst. Genet. 11, 59-60 (1960).Google Scholar
  233. Ganong, W. F.: Upon polyembryony and its morphology in Opuntia vulgaris. Bot. Gaz. 25, 221–228 (1898).CrossRefGoogle Scholar
  234. Garber, E. D.: Cytotaxonomic studies in the genus Sorghum. Univ. Calif. Publ. Bot. 23(6), 283–362 +pl. 40-45 (1950).Google Scholar
  235. Gardner, E. J.: Sexual plants with high chromosome number from an individual plant selection in a natural population of guayule and mariola. Genetics 31, 117–124 (1946a).Google Scholar
  236. Wind pollination in guayule, Parthenium argentatum Gray. Proc. Amer. Soc. Agron. 38, 264-272 (1946b).Google Scholar
  237. Geitler, L.: Natürliches diploides Allium carinatum. Ber. dtsch. bot. Ges. 61(1943), 210–211 (1944).Google Scholar
  238. Gelin, O.: Embryologische und cytologische Studien in Heliantheae-Coreopsidinae. Acta Horti Berg. 11, 99–128 (1934).Google Scholar
  239. Gentcheff, G.: Zytologische und embryologische Studien über einige Hieracium-Arten. Planta (Berl.) 27, 165–195 (1937).CrossRefGoogle Scholar
  240. Degenerative phenomena in the male gametophyte of Hieracium in relation to mitotic behavior of the cell. Univ. St. Kliment, Ochridsky Sofia, Fac. Agr., Year Book 19, 107-150 (1941).Google Scholar
  241. Gentcheff, G., and Å. Gustafsson: The balance system of meiosis in Hieracium. Hereditas (Lund) 26, 209–249 (1940a).CrossRefGoogle Scholar
  242. Parthenogenesis and pseudogamy in Potentilla. Bot. Not. (Lund) 93, 109-132 (1940b).Google Scholar
  243. Gerassimova-Navashina, E. N.: The effect of temperature conditions on the course of embryological processes in plants. Dokl. Akad. Nauk CSSR 131, 1–6, 81-84 (1961).Google Scholar
  244. Gerassimova-Navashina, H.: Fertilization and events leading up to fertilization, and their bearing on the origin of angiosperms. Phytomorphology 11, 1, 2, 139–146 (1961).Google Scholar
  245. Gerstel, D. U.: Is resistance to Verticillium wilt in guayule related to chromosome number? Agron. J. 42, 310–311 (1950a).CrossRefGoogle Scholar
  246. Self-incompatibility studies in guayule. II. Inheritance. Genetics 35, 482-506 (1950b).Google Scholar
  247. Gerstel, D.U., B.L. Hammond and C. Kidd: An additional note on the inheritance of apomixis in guayule. Bot. Gaz. 115, 89–93 (1953).CrossRefGoogle Scholar
  248. Gerstel, D. U., and W. M. Mishanec: On the inheritance of apomixis in Parthenium argentatum. Bot. Gaz. 112, 96–106 (1950).CrossRefGoogle Scholar
  249. Gerstel, D. U., and Mary E. Riner: Self-incompatibility studies in guayule. I. J. Hered. 41, 49–55 (1950).Google Scholar
  250. Gildenhuys, P. J., and K. Brix: Apomixis in Pennisetum dubium. S. Air. J. Agric. Sci. 2, 231–245 (1959).Google Scholar
  251. Gould, F. W.: Notes on apomixis in sidecoats grama. J. Range Mgmt. 12, 25–28 (1959).CrossRefGoogle Scholar
  252. Biosystematic studies in the Bouteloua curtipendula complex. III. pollen size as related to chromosome numbers. Amer. J. Bot. 51 (2), 166-172 (1964).Google Scholar
  253. Granick, E. B.: A karyosystematic study of the genus Agave. Amer. J. Bot. 31, 283–298 (1944).CrossRefGoogle Scholar
  254. Grazi, F., M. Umaerus, and E. Åkerberg: Observations on the mode of reproduction and the embryology of Poa pratensis. Hereditas (Lund) 47, 489–541 (1961).CrossRefGoogle Scholar
  255. Grun, P.: Poa nervosa, an extreme in asexual reproduction. Carnegie Inst. Wash., Year Book 50, 112–113 (1951).Google Scholar
  256. Apomixis and variation in Poa nervosa. Carnegie Inst. Wash., Year Book 51, 117-119 (1952).Google Scholar
  257. Effect of environment upon chromosomal pairing of some species and hybrids of Poa. Amer. J. Bot. 39, 318-323 (1952)Google Scholar
  258. Cytogenetic studies of Poa. I. Chromosome numbers and morphology of interspecific hybrids. Amer. J. Bot. 41, 671-678 (1954).Google Scholar
  259. Cytogenetic studies of Poa. II. The pairing of chromosomes in species and interspecific hybrids. Amer. J. Bot. 42, 11-18 (1955).Google Scholar
  260. Cytogenetic studies in Poa. III. Variation within Poa nervosa, an obligate apomict. Amer. J. Bot. 42, 778-783 (1955).Google Scholar
  261. Grun, P., and E.L. Triplett: Poa cytology. Carnegie Inst. Wash., Year Book 51, 119–122 (1952).Google Scholar
  262. Gudjónsson, G.: Om Aphanes arvensis L. og A. microcarpa (Boiss et Reut.) Rothm. og deres Udbredelse i Danmark. Svensk bot. Tidskr. 45, 352–370 (1941).Google Scholar
  263. Gustafsson, Alton: Cytological studies in the genus Hieracium. Bot. Gaz. 94, 512–533 (1933).CrossRefGoogle Scholar
  264. Gustafsson, Å.: Zytologische und experimentelle Studien in der Gattung Taraxacum. Hereditas (Lund) 16, 41–62 (1932).CrossRefGoogle Scholar
  265. Studies on the mechanism of parthenogenesis. Hereditas (Lund) 21, 1-112 (1935).Google Scholar
  266. The genesis of the European blackberry flora. Lunds Univ. Årsskr., N. F. 39 (6); 1-200 (1943).Google Scholar
  267. Apomixis in higher plants. Part 1-III. Lunds Univ. Årsskr., N. F. Avd. II 42 (3), 43 (2), 43 (12), 370 pp. (1946/47).Google Scholar
  268. Gustafson, Å., and I. Gadd: Mutations and crop improvement. IV. Poa pratensis L. (Graminae). Hereditas (Lund) 53, 90–102 (1965).CrossRefGoogle Scholar
  269. Gustafsson, Å., and A. Nygren: The temperature effect on pollen formation and meiosis in Hieracium robustum. Hereditas (Lund) 32, 1–14 (1946).CrossRefGoogle Scholar
  270. Haberlandt, G.: Die Entwicklungserregung der Eizellen einiger parthenogenetischer Kompositen. S.-B. preuß. Akad. Wiss. 51, 861–881 (1921).Google Scholar
  271. Häfliger, E.: Zytologischembryologische Untersuchungen pseudogamer Ranunkeln der Auricomus-Gruppe. Ber. Schweiz, bot. Ges. 53, 317–382 (1943).Google Scholar
  272. Hagerup, O.: Studies on the significance of polyploidy III. Deschampsia and Aim. Hereditas (Lund) 25, 185–192 (1939).CrossRefGoogle Scholar
  273. On fertilization, polyploidy and haploidy in Orchis maculatus L. sens. lat. Dansk bot. Ark. 11 (5), 1-25 (1944).Google Scholar
  274. Facultative parthenogenesis and haploidy in Epipactis latifolia. Kung. danske Vid. Selsk., Biol. Medd. 19 (11), 1-14 (1945).Google Scholar
  275. The spontaneous formation of haploid, polyploid, and aneuploid embryos in some orchids. Kung. danske Vid, Selsk., Biol. Medd. 20 (9), 22 pp. (1947).Google Scholar
  276. Hair, J. B.: Subsexual reproduction in Agropyron. Heredity 10, 129–160 (1956).CrossRefGoogle Scholar
  277. Håkansson, A.: Die Entwicklung des Embryosacks und die Befruchtung bei Poa alpina. Hereditas (Lund) 29, 25–61 (1943).CrossRefGoogle Scholar
  278. Ergänzende Beiträge zur Embryologie von Poa alpina. Bot. Not. (Lund) 97, 299-311 (1944).Google Scholar
  279. Untersuchungen über die Embryologie einiger Potentilla-Formen. Lunds Univ. Årsskr., N. F. Avd. II 42 (5), 1-70 (1946).Google Scholar
  280. Embryology of Poa alpina plants with accessory chromosomes. Hereditas (Lund) 34, 233-247 (1948).Google Scholar
  281. Parthenogenesis in Allium. Bot. Not. (Lund) 104, 143-179 (1951).Google Scholar
  282. Die Samenbildung bei Nothoscordum fragans. Bot. Not. (Lund) 110, 129-139 (1953).Google Scholar
  283. Notes on the giant chromosomes of Allium nutans. Bot. Not. (Lund) 106, 196-200 (1957).Google Scholar
  284. Håkansson, A., and Albert Levan: Endo-duplicational meiosis in Allium odorum. Hereditas (Lund) 43, 179–200 (1957).CrossRefGoogle Scholar
  285. Hansson, A. A., R. J. Carber and W. M. Myers: Yields of individual and combined apomictic strains of Kentucky bluegrass (Poa pratensis L.). Agron. J. 44, 125–128 (1952).CrossRefGoogle Scholar
  286. Hanson, A. A., and F. V. Juska: Induced mutation in Kentucky bluegrass. Crop Sci. 2, 369–371 (1962).CrossRefGoogle Scholar
  287. Haran, N.: Apomixis in Taraxacum cyprium Lindb. Palestine J. Bot. J Series 5, 237–247 (1950-1952).Google Scholar
  288. Harlan, J. R.: Tucson side-oats grama: an improved strain. Oklahoma crops and soils 1947. Research reported at the second annual Oklahoma crops and soils conference. Old. agric. Exp. Stat., Bull. B 819, 123–125 (1948).Google Scholar
  289. Apomixis in side-oats grama (Bouteloua curtipendula [Michx.] Torr.). Amer. J. Bot. 36, 495-499 (1949).Google Scholar
  290. Harlan, J. R., M. H. Brooks, D. S. Borgaonkar, and J. M. J. De Wet: Nature and inheritance of apomixis in Bothriochloa and Dichantium. Bot. Gaz. 125, 41–46 (1964).CrossRefGoogle Scholar
  291. Harlan, J. R., M. H. Brooks, and R. P. Celarier: Can we break the apomictic barrier? Rep. 14th South Past. and Foage Crop Impr. Conf., Kentucky Exp. St., Lexington Kent. sid. 11-12 (1957).Google Scholar
  292. Harlan, J. R., and R. P. Celarier: Apomixis and species formation in the Bothriochloaea Keng. Rec. Adv. in Bot. (Montreal) 3, 706–710 (1959).Google Scholar
  293. Harlan, J. R., R. P. Celarier, W.L. Richardson, Margaret Hoover Brooks, and K.L.Mehra: Studies on old world bluestems II. Oklahom. St. Univ. Techn. Bull. T-72, 1-23 (1958).Google Scholar
  294. Harlan, J. R., and J. M. J. De Wet: Role of apomixis in the evolution of the Bothriochloa dichanthium complex. Crop Sci. 3, 314–316 (1963).CrossRefGoogle Scholar
  295. Harmsen, L.: Studies on the embryology and cytology of Saxifraga. Medd. om Gronland 125(4), 1–15 (1939).Google Scholar
  296. Hartung, M. E.: Chromosome numbers in Poa, Agropyron, and Elymus. Amer. J. Bot. 33, 516–531 (1946).CrossRefGoogle Scholar
  297. Haskell, G.: Analyses of sexual-apomictic blackberry populations, and their ecological consequenses. Cold Spr. Harb. Symp. quant. Biol. 20, 111–126 (1955).CrossRefGoogle Scholar
  298. Phenoploidy and the distribution of European and British blackberries (Rubus fructicosus). Heredity 14, 221 (1960).Google Scholar
  299. Role of the male parent in apomictic Rubus species. Heredity 14, 101-113 (1960a).Google Scholar
  300. Selection, correlated responses and specia-tion in subsexual Rubus. Genetica 30, 240-260 (1960b).Google Scholar
  301. The genetics of Rubus breeding. Phyton (Argent.) 12, 173-187 (1961).Google Scholar
  302. Genetics and the distribution of British Rubi. Genetica 32, 118-132 (1961).Google Scholar
  303. The history, taxonomy and breeding system of apomictic British Rubi. Reprod. Biol. and Taxon. of Vasc. Plants, p. 141-151. B.S.B. I. Conf. Rep. 9, Pergamon Press. (1966).Google Scholar
  304. Haskell, G., and J. Hill: Segregation in tetraploid Blackberries. Heredity 16, 3, 354–358 (1961).CrossRefGoogle Scholar
  305. Haskell, G., and N. N. Tun: Developmental sequence of chromosome number in a cytologically unstable Rubus hybrid. Genet. Res. 2, 10–24 (1961).CrossRefGoogle Scholar
  306. Haskell, G. M.: Breeding behaviour of subsexual Rubus species. Heredity 11, 427 (1957).Google Scholar
  307. Hedberg, O.: Cyto-taxonomic studies in Scottish mountain plants, notably Deschampsia caespitosa (L.) PB., s. lat. Svensk. bot. Tidskr. 52, 37–46 (1958).Google Scholar
  308. Heitz, E.: Embryologischer Nachweis von Agamospermie mittels Simultanmethode. Experientia (Basel) 7, 456 (1951).CrossRefGoogle Scholar
  309. Heribert-Nilsson, N.: Totale Inventierung der Mikrotypen eines Minimiareals von Taraxacum officinale. Hereditas (Lund) 33, 119–142 (1947).CrossRefGoogle Scholar
  310. Heslop Harrison, Y.: Cytological studies in the genus Rubus L. 1. Chromosome numbers in the British Rubus flora. New Phytologist 52, 22–39 (1953).CrossRefGoogle Scholar
  311. Hiesey, W.M.: Growth studies under controlled temperatures. Carnegie Inst. Wash., Year Book 50, 99–105 (1951).Google Scholar
  312. Responses of hybrid bluegrass strains to contrasting environments. Proc. 7th Int. Grassland Congr., Massey Agric. Coll., Palmeston North, New Zealand, sid. 1956, p. 212-221.Google Scholar
  313. Hjelmqvist, H.: The apomictic development in Malus Sieboldii. Bot. Not. (Lund) 110, 455–467 (1957).Google Scholar
  314. Studien über Embryologie und Variabilität bei einigen Aphanes-Arten. Bot. Not. (Lund) 112, 17-64 (1959a).Google Scholar
  315. On the embryology of two Malus hybrids. Bot. Not. (Lund) 112, 453-464 (1959b).Google Scholar
  316. The embryo sac development of some Cotoneaster species. Bot. Not. (Lund) 115, 208-236 (1962).Google Scholar
  317. Hjelmqvist, H., and F. Grazi: Studies on variation in embryo sac development. Bot. Not. (Lund) 117, 141–166 (1964).Google Scholar
  318. Studies on variation in embryo sac development. Second part. Bot. Not. (Lund) 118, 329-360 (1965).Google Scholar
  319. Hofmeyr, J. D. J., and P. C. J. Oberholzer: Genetic aspects associated with the propagation of Citrus. Farming S. Afr. 23, 201–208 (1948).Google Scholar
  320. Holmgren, I.: Zytologische Studien über die Fortpflanzung bei den Gattungen Erigeron und Eupatorium. Kung. Svensk Vet.-Akad. Handl. 59(7), 1–118 (1919).Google Scholar
  321. Horn, C. L.: Existence of only one variety of cultivated mangosteen explained by asexually formed “seed”. Science 92, 237–238 (1940).PubMedCrossRefGoogle Scholar
  322. Hou-Liu, S. Y.: The chromosome counts of some taraxacum species. Acta bot. neerl. 12, 76–83 (1963).Google Scholar
  323. Hubbard, J.: A study of Andropogon ischaemum L. M.S. thesis, A. & M. College of Texas 1950.Google Scholar
  324. Hull, E.D.: Polyembryony in Opuntia Rafinesquii. Amer. J. Bot. 21, 56–57 (1915).Google Scholar
  325. Hunziker, H. R.: Beitrag zur Aposporie und ihrer Genetik bei Potentilla. Arch. Klaus-Stift. Vererb.-Forsch. 29, 135–222 (1954).Google Scholar
  326. Hutchison, D. J., and E. C. Bashaw: Cytology and reproduction of Panicum coloratum and related species. Crop Sci. 4, 151–153 (1964).CrossRefGoogle Scholar
  327. Ikeno, S.: Studien über die mutative Entstehung eines hochmutablen Genes bei einer parthenogenetischen Pflanzenart. Z. indukt. Abstamm.-u. Vererb.-Lehre 68, 517–542 (1935).CrossRefGoogle Scholar
  328. Jagannath, D. R., B. W. X. Ponnaiya, and W. S. Raman: A study of morphological and cytological variation in chromosomal races of two species of Cenchrus. Madras Agr. J. 51, 362 (1964).Google Scholar
  329. Jankun, A., and R. Izmailow: Badania cytotaksonomiczne nad polimorficznym gatunkiem Ranunculus cassubicus L. — Cytotaxonomical studies in the polymorphic species Ranunculus cassubicus L. Acta biol. cracoviensia, Ser. Bot. 7 (1964).Google Scholar
  330. Jeffrey, E.C.: Hormones in relation to parthenogenesis. Genetics 33, 615 (1948).PubMedGoogle Scholar
  331. Johansen, D.: Studies on the morphology of the Onagraceae. III. Taraxia ovata (Nutt.) Small. Ann. Bot. 45, 111–124 (1931).Google Scholar
  332. Johnson, A.: Polyembryony in Eugenia Hookeri. Amer. J. Bot. 23, 83–85 (1936).CrossRefGoogle Scholar
  333. Johnson, B. L.: High rubber yielding selections from a natural population of guayule. Agron. J. 42, 345–350 (1950).CrossRefGoogle Scholar
  334. Juel, O.: Parthenogenesis bei Antennaria alpina (L.) Br. Bot. Zbl. 74, 369–372 (1898).Google Scholar
  335. Vergleichende Untersuchungen über typische und parthenogenetische Fortpflanzung bei der Gattung Antennaria. Kung. Svensk Vet. Akad.-Handl. 33 (5), 1-59 (1900).Google Scholar
  336. Juhl, H.: Zytologische Untersuchungen an einigen Formen von Poa pratensis L. in Schleswig-Holstein. Flora (Jena) 139, 462–476 (1952).Google Scholar
  337. Juhl-Noodt, H.: Apomixis und umweltbedingte Variation bei Poa pratensis L. Züchter 25, 3, 80–86 (1955).Google Scholar
  338. Julén, Gösta: Über die Effekte der Röntgenbestrahlung bei Poa pratensis. Züchter 28, 37–40 (1958).Google Scholar
  339. The effect of X-raying on the apomixis in Poa pratensis. Proc. 6th Ann. Meet. Ital. Soc. Agric. Genetics. Genet. agr. 13, 60-66 (1960).Google Scholar
  340. The effect of X-rays on the apomixis in Poa pratensis. Int. Atom Energy Ag., Vienna 1961, p. 527-532.Google Scholar
  341. Juliano, J. B.: Origin of embryos in the strawberry mango. Philipp. J. Sci. 54, 553–556 (1934). (Cited after Stebbins 1941).Google Scholar
  342. Embryos of Carabao Mango, Mangifera indica L. Philipp. Agr. 25, 749-760 (1937). (Cited after Stebbins 1941.)Google Scholar
  343. Juliano, I.B., and N. Y. Cuevas: Floral morphology of the mango (Mangifera indica L.) with special reference to the pico variety from the Philippines. Philipp. Agr. 21, 449–472 (1932). Cited after Stebbins 1941.Google Scholar
  344. Julin, E.: Der Formenkreis des Ranunculus auricomus L. in Schweden. I. Diagnosen und Fundortsangaben einiger Sippen aus Södermanland. Ark. Bot. (Stockh.) Ser. 2, 6(1), 1–28 (1963).Google Scholar
  345. Några ord om Sveriges majranunkelflora. Svensk bot. Tidskr. 58, 27-30 (1964).Google Scholar
  346. Der Formenkreis des Ranunculus auricomus L. in Schweden. II. Diagnosen und Fundortsangaben neuer Sippen aus Södermanland. Ark. Bot., Ser. 2, 6 (2), 29-108 (1965).Google Scholar
  347. Kapadia. Z. L. and F.W. Gould: Biosystem atic studies in the Bouteloa curtipendula var. caespitosa. Bull. Torrey Bot. Club 91, 465–478 (1964).CrossRefGoogle Scholar
  348. Kappert, H.: Experimentelle Untersuchungen über die Variabilität eines Totalapomikten (Taraxacum officinale Web.). Ber. dtsch. bot. Ges. 67, 325–334 (1954).Google Scholar
  349. Kawano, S.: Cytogeography and evolution of the Deschampsia caespitosa complex. Canad. J. Bot. 41, 719–742 (1963).CrossRefGoogle Scholar
  350. Kerner, A.! Parthenogenesis bei einer angiospermen Pflanze. S.-B. Akad. Wiss. Wien, math.-nat. Kl. I 74, 469 (1876).Google Scholar
  351. Kiellander, C. L.: A subhaploid Poa pratensis L. with 18 chromosomes and its progeny. Svensk bot. Tidskr. 36, 200–220 (1942).Google Scholar
  352. Knox, R. B., and J. Heslop-Harrison: Experimental control of aposporeous apomixis in a grass of the Andropogoneae. Bot. Not. (Lund) 116, 127–141 (1963).Google Scholar
  353. Koch, W.: Schweizerische Arten aus der Verwandschaft des Ranunculus auricomus L. Ber. Schweiz, bot. Ges. 42, 740–753 (1933).Google Scholar
  354. Zweiter Beitrag zur Kenntnis des Formenkreises von Ranunculus auricomus L. Ber. Schweiz. bot. Ges. 49, 541-554 (1939).Google Scholar
  355. Koroleva, V. A.: Interspecific hybridization in the genus Taraxacum. C. R. Acad. Sci. URSS. 24, 174–176 (1939).Google Scholar
  356. Krause, O.: Zytologische Studien bei den Urticales unter besonderer Berücksichtigung der Gattung Dorstenia. Planta (Berl.) 13, 29–84 (1931).CrossRefGoogle Scholar
  357. Krug, C. A.: Chromosome numbers in the subfamily Aurantioideae, with special reference to the genus Citrus. Bot. Gaz. 104, 602–611 (1943).CrossRefGoogle Scholar
  358. Lawrence, W. E.: Some ecotypic relations of Deschampsia caespitosa. Amer. J. Bot. 32, 298–314 (1945).CrossRefGoogle Scholar
  359. Leroy, J. F.: Sur un “complexe agamique” des manguiers et sur l’origine et laphylogénie des variétés. Rev. Bot. Agr. Trop. 27, 304–309 (1947).Google Scholar
  360. Levan, A.: Zytologische Studien an Allium schoenoprasum. Diss. Lund 1935, also in Hereditas (Lund) 22, 1–128 (1936/37).CrossRefGoogle Scholar
  361. Cytological studies in the Allium paniculatum group. Hereditas (Lund) 23, 317-370 (1937).Google Scholar
  362. The cytology of Allium amplectens and the occurrence in nature of its asynapsis. Hereditas (Lund) 26, 353-394 (1940).Google Scholar
  363. Levan, A., and S. L. Emsweller: Structural hybridity in Nothoscordum fragrans and the origin of terminally attached chromosomes. J. Hered. 29, 291–294 (1938).Google Scholar
  364. Li, Lai-Yung: Vivipary in some Chinese plants. Bot. Gaz. 112, 358–359 (1950).CrossRefGoogle Scholar
  365. Lidforss, B.: Batologiska iakttagelser. I. Öfv. Kung. Svensk Vet.-Akad. Förh. 56(1), 21–35 (1899).Google Scholar
  366. Batologiska iakttagelser. II. Öfv. Kung. Svensk Vet.-Akad. Förh. 58 (1), 59-90 (1901).Google Scholar
  367. Studier över artbildningen inom släktet Rubus. Ark. Bot. 4 (6), 1-41 (1905).Google Scholar
  368. Studier över artbildningen inom släktet Rubus. II. Ark. Bot. No. 16, 1-43 (1907a).Google Scholar
  369. Über das Studium polymorpher Gattungen. Bot. Not. (Lund) 60, 241-261 (1907b).Google Scholar
  370. Resumé seiner Arbeiten über Rubus. Z. indukt. Abstamm.-u. Vererb.-Lehre 12, 1-13 (1914).Google Scholar
  371. Liljefors, A.: Über normale und apospore Embryoentwicklung in der Gattung Sorbus, nebst einigen Bemerkungen über die Chromosomenzahlen. Svensk bot. Tidskr. 28, 290–299 (1934).Google Scholar
  372. Studies on propagation, embryology and pollination in Sorbus. Acta Horti Berg. 16, 277-329 (1953).Google Scholar
  373. Cytological studies in Sorbus. Acta Horti Berg. 17, No 4, 47-113 (1955).Google Scholar
  374. Studies on species formation in the genus Sorbus in Scandinavia. Stockholm. Diss. 1955. 10 pp.Google Scholar
  375. Linnaeus, C.: Flora Lapponica. Amstelaedami 1737.Google Scholar
  376. Flora Alpina. Amoenitates Academicae. Vol. 4. Holmiae 1759.Google Scholar
  377. Löve, A.: Cytogenetic studies in Rumex. III. Some notes on the Scandinawian species of the genus. Hereditas (Lund) 28, 289–296 (1942).CrossRefGoogle Scholar
  378. Agamospermy in Acetosa. Hereditas (Lund) 35, 390-393 (1949).Google Scholar
  379. Preparatory studies for breeding Icelandic Poa irrigata. Hereditas (Lund) 38, 11-32 (1952).Google Scholar
  380. Löve, A., and D. Löve: Chromosome numbers of Scandinavian plant species. Bot. Not. (Lund) 95, 19–59 (1942).Google Scholar
  381. Chromosome numbers of Northern plant species. Reykjavik 1948, 131 pp. (1948).Google Scholar
  382. Longley, A. E.: Cytological studies in the genus Crataegus. Amer. J. Bot. 11, 295–317 (1924a).CrossRefGoogle Scholar
  383. Cytological studies in the genus Rubus. Amer. J. Bot. 11, 249-282 (1924b).Google Scholar
  384. Longo, B.: La poliembrionia nello Xanthozylum Bungei Planch, senza fecondazione. Bull. Soc. Bot. Ital. 17, 113–115 (1908).Google Scholar
  385. MacAllister, F.: On the cytology and embryology of Smilacina racemosa. Trans. Wise. Acad. Sci., Arts Lett. 17(1), 599–660 (1913). Cited after Schnarf 1929.Google Scholar
  386. Majsuradze, N. I.: The growth of sexual and nucellar embryos of the orange. Agrobiologija 9, 309–310 (1961).Google Scholar
  387. Malecka, J.: Liczby chromosomów niektórych polskich gatunków Taraxacum. Chromosome numbers of some Taraxacum-species in Poland. Acta biol. cracov. Sér. bot. 1, 55–56 (1958).Google Scholar
  388. Badania cytologiczne nad rodzajem Taraxacum. Cytological studies in the genus Taraxacum. Acta biol. cracov. 5, 117-136 (1962).Google Scholar
  389. Mamporija, F.D.: The effect of the fertilizing element upon nucellar cells in citrus fruits. Agrobiologija 5, 119–131 (1957).Google Scholar
  390. Marklund, G.: Einige Sippen der Ranunculus cmncomws-Gruppe. Mem. Soc. Fauna Flora fenn. 16, 45–53 (1939).Google Scholar
  391. Marklund, G., and A. Rousi: Outlines of evolution in the pseudogamous Ranunculus auricomus group in Finland. Evolution (Lawrence, Kansas) 15, 4, 510–522 (1961).CrossRefGoogle Scholar
  392. Marsden-Jones, E. M., and W. B. Turrill: Studies in Ranunculus. III. Further experiments concerning sex in Ranunculus acris. J. Genet. 31, 363–378 (1935).CrossRefGoogle Scholar
  393. Studies in Ranunculus. IV. Additional experiments with Ranunculus bulbosus and R. acris. J. Genet. 51, 26-31 (1952).Google Scholar
  394. Matsuura, H., and T. Suto: Contributions to the idiogram study in phanerogamous plants. I. J. Fac. Sci. Hokkaido Imp. Univ. V 5(1), 33–75 (1935).Google Scholar
  395. Mattfeld, J.: Über einen Fall endocarper Keimung bei Papaver somniferum L. Verh. bot. Ver. Prov. Brandenburg 62, 1–8 (1920).Google Scholar
  396. Mauritzon, J.: Die Embryologie einiger Capparidaceen sowie von Tovaria pendula. Ark. Bot. A 26(15), 1–14 (1934).Google Scholar
  397. Über die Embryologie der Familie Retaceae. Svensk bot. Tidskr. 29, 319-347 (1935).Google Scholar
  398. McDonald, C. C.: A study of seed development in three species of Erigeron with special reference to apogamy. Bull. Torrey bot. Club 54, 479–497 (1927).CrossRefGoogle Scholar
  399. Mehra, K. L.: Chromosome numbers, geographical distribution and taxonomy of the Dichanthium annulatum complex. Phyton (Argent.) 157–166, No 12 (1961).Google Scholar
  400. The Dichantium annulatum complex. II. Relationships between the tropical and Mediterranean types. Phyton (Argent.) 21, 119-126 (1964).Google Scholar
  401. The Dichantium annulatum complex. III. Origin and artificial synthesis of Dichantium papillosum Stapf. Caryologia 17, 545-556 (1964).Google Scholar
  402. Mehra, K. L., and R. P. Celarier: Cytotaxonomic notes on the Dichanthium annulatum complex. Proc. Oklahoma Acad. Sci. 38, 22–25 (1958).Google Scholar
  403. Mehra, K. L., K. N. Subramanyam, and M. S. Swaminathan: Cytogenetical studies in some members of Andropgoneae. J. Indian Bot. Soc. 41, 491–502 (1962).Google Scholar
  404. Mendes, A. J. T.: Parthenogenesis, parthenocarpy and instances of abnormal fertilization in Coffea. Bragantia (São Paulo) 6, 265–273 (1946).Google Scholar
  405. A citologia e o melhoramento do cafeeiro. (Cytology and the improvement of coffee.) Bot. Sup. Serv. Café 22, 236-240 (1947).Google Scholar
  406. Coffee cytology. Proc. VIII. Int. Congr. Gen. Hereditas (Lund) Suppl. Vol. 628 (1949).Google Scholar
  407. Messeri, A.: II numéro dei cromosomi dell’Allium roseum v. bulbilliferum e dell’Allium confr. odorum e nuovo esempi di rapporti fra apomissia e polyploidismo. Nuovo Giorn. bot. ital. 37, 276–277 (1930).Google Scholar
  408. Miduno, T.: Chromosomenstudien an Orchidazeen. III. Über das Vorkommen von haploiden Pflanzen bei Bletilla striata Reichb. f. var. gebine Reichb. f. Cytologia 11 (1940). Cited after Biol. Abstr. 15, 16193 (1941).Google Scholar
  409. Moffett, A. A.: The chromosome constitution of the Pomoideae. Proc. roy. Soc. B 108, 423–446 (1931).CrossRefGoogle Scholar
  410. Mohamed, A. H., and F.W. Gould: Biosystematic studies in the Bouteloa curtipendula complex. V. Megasporogenesis and embryo sac development. Amer. J. Bot. 53, 166–169 (1966).CrossRefGoogle Scholar
  411. Montemartini, L.: Con-tributo allo studio del’anatomia del frutto e del seme delle Opunzie. Atti Ist. Bot. Univ. Pavia II 5, 59–68 (1899). Cited after Schnarf 1929.Google Scholar
  412. Moreira, S., J. T. A. Gurgel and L.F. de Arruda: Polyembryony in Citrus. Bragantia (Sao Paulo) 7, 69–106 (1947).Google Scholar
  413. Müntzing, A.: Pseudogamie in der Gattung Potentilla. Hereditas (Lund) 11, 267–283 (1928).CrossRefGoogle Scholar
  414. Note on the cytology of some apomictic Potentilla species. Hereditas (Lund) 15, 166-178 (1931).Google Scholar
  415. Apomictic and sexual seed formation in Poa. Hereditas (Lund) 17, 131-154 (1932/33).Google Scholar
  416. Further studies on apomixis and sexuality in Poa. Hereditas (Lund) 26, 115-190 (1940).Google Scholar
  417. Different chromosome numbers in root tips and pollen mother cells in a sexual strain of Poa alpina. Hereditas (Lund) 34, 127-129 (1946).Google Scholar
  418. Accessory chromosomes in Poa alpina. Heredity 2, 49-61 (1948).Google Scholar
  419. Accessory chromosomes in Secale and Poa. Proc. VIII. Int. Congr. Genet. Hereditas (Lund) Suppl. Vol. 35, 402-411 (1949).Google Scholar
  420. The cytological basis of polymorphism in Poa alpina. Hereditas (Lund) 40, 459-516 (1954).Google Scholar
  421. Further studies on intraspecific polyploidy in Potentilla argentea (coll.). Bot. Not. (Lund) 111, 209-227 (1958a).Google Scholar
  422. The balance between sexual and apomictic reproduction in some hybrids of Potentilla. Hereditas (Lund) 44, 145-160 (1958b).Google Scholar
  423. Heteroploidy and polymorphism in some apomictic species of Potentilla. Hereditas (Lund) 44, 280-329 (1958c).Google Scholar
  424. Sublethal species hybrids in Potentilla. Hereditas (Lund) 44, 554-556 (1958d).Google Scholar
  425. Apomixis and sexuality in new material of Poa alpina from middle Sweden. Hereditas (Lund) 54, 314-337 (1966).Google Scholar
  426. Müntzing, A., and G. Müntzing: Some new results concerning apomixis, sexuality and polymorphism in Potentilla. Bot. Not. (Lund) 94, 237–278 (1941).Google Scholar
  427. Recent results in Potentilla. Hereditas (Lund) 28, 232-235 (1942).Google Scholar
  428. Spontaneous changes in chromosome number in apomictic Potentilla collina. Hereditas (Lund) 29, 451-460 (1943).Google Scholar
  429. A pentaplid F1 hybrid between two diploid Potentilla species. Hereditas (Lund) 30, 631-638 (1944).Google Scholar
  430. The mode of reproduction of hybrids between sexual and apomictic Potentilla argentea. Bot. Not. (Lund) 98, 49-71 (1945).Google Scholar
  431. Müntzing, A., and A. Nygren: A new diploid variety of Poa alpina with two accessory chromosomes at meiosis. Hereditas (Lund) 41, 405–522 (1955).CrossRefGoogle Scholar
  432. Mukherjee, S. K.: Origin and distribution of Saccharum. Bot. Gaz. 119, 55–61 (1957).CrossRefGoogle Scholar
  433. Mulligan, G. A.: Chromosome numbers of the family Cruciferae. III. Canad. J. Bot. 44, 309–319 (1966).CrossRefGoogle Scholar
  434. Murbeck, Sv.: Parthenogenetische Embryobildung in der Gattung Alchemilla. Lunds Univ. Årsskr. 36, Afd, 2, No 7, 1–45 (1901).Google Scholar
  435. Murgai, P.: In vitro experiments on apomictic Aerva tomentosa Forsk. Proc. forty-sixth Indian Sci. congr. 1959, part III, p. 326-327.Google Scholar
  436. Myers, W.M.: Cytology and gentics of forage grasses. Bot. Rev. 13, 319–421 (1947).CrossRefGoogle Scholar
  437. Nannfeldt, J. A.: On Poa jemtlandica (Almqu.) Richt., its distribution and possible origin. Bot. Not. (Lund) 90, 1–27 (1937).Google Scholar
  438. On the polymorphy of Poa arctica R. Br. Symb. bot. upsal. 4 (4), 1-85 (1940).Google Scholar
  439. Narayan, K. N.: Cytogenetic studies of apomixis in Pennisetum. Ph. D. thesis, Univ. Calif 1951.Google Scholar
  440. Nielsen, E. L.: Cytology and breeding behavior of selected plants of Poa pratensis. Bot. Gaz. 106, 357–382 (1945).CrossRefGoogle Scholar
  441. Breeding behavior and chromosome numbers in progenies from twin and triplet plants in Poa pratensis. Bot. Gaz. 108, 26-40 (1946 a).Google Scholar
  442. The origin of multiple macrogametophytes in Poa pratensis. Bot. Gaz. 108, 41-50 (1946b).Google Scholar
  443. Developmental sequence of embryo and endosperm in apomictic and sexual forms of Poa pratensis. Bot. Gaz. 108, 531-534 (1947).Google Scholar
  444. Nielsen, E. L., and D. C. Smith: Comparisons of clonal isolations of Poa pratensis L. from good and poor pastures for vigor, variability and disease reactions. Agronomy J. 43(4), 214–218 (1951).Google Scholar
  445. Dimorphic panicle formation in Poa pratensis. Bot. Gaz. 112, 4, 534-535 (1951).Google Scholar
  446. Interrelations of selected plant characters in Kentucky bluegrass (Poa pratensis L.). Bot. Gaz. 114, 53-62 (1952).Google Scholar
  447. Nisioka, T., and N. Takahashi: Studies on the promotion of sprouting and breaking of dormancy in winter-buds of Cornus controversa. Phylogenetic study in the Ixeris dentata group II. General aspect of the Ixeris dentata group. Jap. J. Bot. 18, 2, 169–225 (1963).Google Scholar
  448. Noack, K.: Über Hypericum-Kreuzungen. VI. Fortpflanzungsverhältnisse und Bastarde von Hypericum perforatum L. Z. indukt. Abstamm.-u. Vererb.-Lehre 76, 569–601 (1939).CrossRefGoogle Scholar
  449. Norstog, K.: Apomixis and polyembryony in Hierochloe odorata. Amer. J. Bot. 50, 815–821 (1963).CrossRefGoogle Scholar
  450. Nygren, A.: The genesis of some Scandinavian species of Calamagrostis. Hereditas (Lund) 32, 131–262 (1946).CrossRefGoogle Scholar
  451. Further studies in spontaneous and synthetic Calamagrostis purpurea. Hereditas (Lund) 34, 113-134 (1948 a).Google Scholar
  452. Some interspecific crosses in Calamagrostis and their evolutionary consequences. Hereditas (Lund) 34, 387-413 (1948 b).Google Scholar
  453. Apomictic and sexual reproduction in Calamagrostis purpurea. Hereditas (Lund) 35, 285-300 (1949 a).Google Scholar
  454. Studies on vivipary in the genus Deschampsia. Hereditas (Lund) 35, 27-32 (1949 b).Google Scholar
  455. Cytological and embryological studies in arctic Poae. Sym. bot. upsal. 10 (4), 1-64 +15 pi. (1950a).Google Scholar
  456. A cytological and embryological study of Antennaria Porsildii. Hereditas (Lund) 36, 483-485 (1950b).Google Scholar
  457. Embryology of Poa. Carnegie Inst. Wash., Year Book 50, 113-115 (1951a).Google Scholar
  458. Form and biotype formation in Calamagrostis purpurea. Hereditas (Lund) 37, 519-532 (1951b).Google Scholar
  459. How to breed Kentucky blue grass, Poa pratensis L. Hereditas (Lund) 39, 51-56 (1953).Google Scholar
  460. Investigations on North American Calamagrostis. Hereditas (Lund) 40, 377-397 (1954a).Google Scholar
  461. Apomixis in the Angiosperms. Bot. Rev. 20, 577-649 (1954b).Google Scholar
  462. Chromosome studies in the Poa laxa group. Ann. roy. agric. Coll. Sweden 22, 359-368 (1955a).Google Scholar
  463. Further studies in diploid Poa alpina without accessory chromosomes at meiosis. Ann. roy. agric. Coll. Sweden 22, 179-191 (1955b).Google Scholar
  464. Poa timoleontis Heldr., a new diploid species of the section Bolbophorum A. and Gr. with accessory chromosomes only in the meiosis. Ann. roy. agric. Coll. Sweden 23, 489-495 (1957).Google Scholar
  465. Investigations on North American Calamagrostis. II. Ann. roy. agric. Coll. Sweden 24, 363-368 (1958).Google Scholar
  466. On Poa badensis, Poa concinna, Poa pumila, Poa xerophilaiand the possible origin of Poa alpina. Ann. Acad. Reg. Sci. Upps. 6, 1-29 (1962a).Google Scholar
  467. Artificial and natural hybridization in European Calamagrostis. Symb. Bot. Upsal. 17 (3), 1-105 (1962b).Google Scholar
  468. Apomixis (including vegetative reproduction). Apomixis in the Angiosperms, with special reference to Calamagrostis and Poa. Biol. and taxonom. of vase, plants. B.S.B.I. Conf. Rep. No 9, 131-140 (1966).Google Scholar
  469. Nygren, A., and G. Almgård: On the experimental control of vivipary in Poa. Ann. roy. Agric. Coll. Sweden 28, 27–36 (1962).Google Scholar
  470. Nygren, A., and E. Åkerberg: Studies in species and hybrid derivatives of Poa new to practical work. Acad. Reg. Sci. Upsal. 1, 53–69 (1957).Google Scholar
  471. Oehler, E.: Entwicklungsgeschichtlich-zytologische Untersuchungen an einigen saprophytischen Gentianaceen. Planta (Berl.) 3, 641–733 (1927).CrossRefGoogle Scholar
  472. Oka, H. T.: Zytologische Beobachtungen über eine Mutantensippe von Erigon annuus. Jap. J. Genet. 10, 237–241 (1935).CrossRefGoogle Scholar
  473. Okabe, S.: Über Parthenogenesis bei Houttuynia cordata. Jap. J. Genet. 6, 14–19 (1930).CrossRefGoogle Scholar
  474. Parthenogenesis bei Ixeris dentata. Bot, Mag. (Tokyo) 46, 518-523 (1932).Google Scholar
  475. Oldén, E. J.: Sexual and apomictic seed formation in Malus Sieboldii Rehd. Bot. Xot. (Lund) 106, 105–128 (1953).Google Scholar
  476. Orr, M.Y.: Polyembryony in Sarcococca riscifolia Stapf. Roy. Bot. Gard. Edinburgh. Notes 14, 21–23 (1923). Cited after Schnarf 1929.Google Scholar
  477. Osawa, J.: Cytological and experimental studies in Citrus. J. Coll. Agr., Imp. Univ. Tokyo 4, 83–116 (1912).Google Scholar
  478. Studies on the cytology of some species of Taraxacum. Arch. Zeilforsch. 10, 450-469 (1913).Google Scholar
  479. Ostenfeld, C. H.: Experiments on the origin of species in the genus Hieracium (apogamy and hybridsism). New Phytologist 11, 347–354 (1912).CrossRefGoogle Scholar
  480. Pace, L.: Apogamy in Atamosco. Bot. Gaz. 56, 376–394 (1913).CrossRefGoogle Scholar
  481. Palmer, E. J.: The Crataegus problem. J. Arn. Arb. 13. 342–362 (1932).Google Scholar
  482. Perry, B. A.: Chromosome numbers and phylogenetic relationships in the Euphorbiaceae. Amer. J. Bot. 30, 527–543 (1943).CrossRefGoogle Scholar
  483. Peter, J.: Zur Entwicklungsgeschichte einiger Calycanthaceen. Beitr. Biol. Pflanzen 14, 59–84 (1920).Google Scholar
  484. Petroyskaya-Baranova, T.P. and N.V. Zinger: Atavistic adaptations to the sexual process in seedbuds of parthenogenetic species of Taraxacum. Transact. Moscow Soc. Nat. 13, 257–266 (1965).Google Scholar
  485. Pfitzer, P.: Apomixis und Embryosack-entwicklung in der Gattung Aglaonema Engl. Portugal. Acta biol. 6, 3–4, 279-293 (1962).Google Scholar
  486. Pijl, L. van der: Über die Polyembryonie bei Eugenia. Rec. Trav. bot. néerl. 31, 113–187 (1934).Google Scholar
  487. Plumier, W.: Biologie florale et fécondation. (Colloquium of studies on witloof chicory Gembloux.) Ann. Gembloux 66, 151–156 (1960).Google Scholar
  488. Poddubnaja-Arnoldi, W. A.: Geschlechtliche und ungeschlechtliche Fortpflanzung bei einigen Chondrilla-Arten. Planta (Berl.) 19, 46–86 (1933).CrossRefGoogle Scholar
  489. Development of pollen and embryosac in interspecific hybrids of Taraxacum. C. R. Acad. Sci. URSS. 24, 374-377 (1939).Google Scholar
  490. Poddubnaja-Arnoldi, V., u. V. Dianowa: Eine zytoembryologische Untersuchung einiger Arten der Gattung Taraxacum. Planta (Berl.) 23, 19–46 (1934).CrossRefGoogle Scholar
  491. Popoff, A.: Über die Fortpflanzungsverhältnisse der Gattung Potentilla. Planta (Berl.) 24, 510–522 (1935).CrossRefGoogle Scholar
  492. Porsild, M. P.: On the genus Antennaria in Greenland. Medd. om Grønland 51, 265–281 (1915).Google Scholar
  493. Powers, L.: Fertilization without reduction in guayule (Parthenium argentatum Gray) and a hypothesis as to the evolution of apomixis and pofyploidy. Genetics 30, 323–346 (1945).PubMedGoogle Scholar
  494. Powers, L., and E. J. Gardner: Frequency of aborted pollen grains and microcytes in guayule, Parthenium argentatum Gray. J. Amer. Soc. Agron. 37, 184–193 (1945).CrossRefGoogle Scholar
  495. Powers, L., and R. C. Rollins: Reproduction and pollination studies on guayule, Parthenium argentatum Gray and P. incanum H. B. K. J. Amer. Soc. Agron. 37, 96–112 (1945).CrossRefGoogle Scholar
  496. Pratt, C., and J. Einset: Development of the embryo sac in some American blackberries. Amer. J. Bot. 42, 637–645 (1955).CrossRefGoogle Scholar
  497. Pratt, C., J. Einset, and T. Clausen: Embryology, breeding behaviour and morphological characteristics of apomictic, triploid Rubus idaeus L. Bull. Torrey Bot. Club 85, 242–254 (1958).CrossRefGoogle Scholar
  498. Raghavan, T. S.: The sugarcanes of India. J. Hered. 42, 199–206 (1951).Google Scholar
  499. Raghuvanshi, S.S.: Cytogenetical studies in Genus Citrus. IV. Evolution in Genus Citrus. Cytologia (Tokyo) 27, 172–188 (1962).Google Scholar
  500. Rancken, G.: Zytologische Untersuchungen an einigen wirtschaftlich wertvollen Wiesengräsern. Acta agral. fenn. 29, 1–92 (1934).Google Scholar
  501. Renner, O.: Zur Terminologie des pflanzlichen Generationswechsels. Biol. Zbl. 36, 337–374 (1916).Google Scholar
  502. Reusch, J. D. H.: The relationship between reproductive factors and seed set in Paspalum dilatatum. S. Afr. J. Agric. Sci. 4, 513–530 (1961).Google Scholar
  503. Rollins, R, C.: Interspecific hybridization in Parthenium. I. Crosses between Guayule (P. argentatum) andMariola (P. incanum). Amer. J. Bot. 32, 395–404 (1945a).CrossRefGoogle Scholar
  504. Evidence for genetic variation among apomictically produced plants of several F1 progenies of Guayule (Parthenium argentatum) and Mariola (P. incanum). Amer. J. Bot. 32, 554-560 (1945b).Google Scholar
  505. Sources of genetic variation in Parthenium argentatum Gray (Compositae). Evolution 3, 358-368 (1949).Google Scholar
  506. Rosenberg, O.: Cytological studies on the apogamy in Hieracium. Bot. Tidsskr. 28, 143–170 (1907).Google Scholar
  507. Über die Apogamie bei Chondrilla juncea. Svensk bot. Tidsskr. 6, 915-919 (1912).Google Scholar
  508. Die Reduktionsteilung und ihre Degeneration in Hieracium. Svensk bot. Tidskr. 11, 145-206 (1917).Google Scholar
  509. Die semiheterotypische Teilung und ihre Bedeutung für die Entstehung verdoppelter Chromosomenzahlen. Hereditas (Lund) 8 (1926, 1927), 305-338 (1927).Google Scholar
  510. Apogamie und Parthenogenesis bei Pflanzen. In: Handbuch der Vererbungswissenschaften, Liefg 12, S. 1-66. 1930.Google Scholar
  511. Rousi, A.: Cytotaxonomy and reproduction in the apomictic Ranunculus auricomus group. Ann. bot. Soc. zool.-bot. fenn. “Vanamo” 29, No 2, 1–64+1 pl. (1956).Google Scholar
  512. Roy, R. P., A. P. Singh. and P. K. Gupta: A new chromosome race in Heteropogon contortus. Current Sci. 34, 190 (1965).Google Scholar
  513. Rozanova, M. A.: Versuch einer analytischen Monographie der conspecies Ranunculus auricomus Korsh. Trav. Inst. Sci. Nat. Peterhof 8, 19–148 (1932).Google Scholar
  514. Rutishauser, A.: Konstante Art-und Rassenbastarde in der Gattung Potentilla. Mitt. naturforsch. Ges. Schaffhausen 18, 111–134 (1943 a).Google Scholar
  515. Über die Entwicklungsgeschichte pseudogamer Potentillen. Arch. Klaus-Stift. Vererb.-Forsch. 18, 687-691 (1943b).Google Scholar
  516. Untersuchungen über die Fortpflanzung und Bastardbildung apomiktischer Potentillen. Ber. Schweiz, bot. Ges. 53, 1-83 (1943c).Google Scholar
  517. Über die Fortpflanzung einiger Bastarde von pseudogamen Potentillen. Arch. Klaus-Stift. Vererb.-Forsch., Erg.-Bd. zu 20. 300-314 (1945a).Google Scholar
  518. Zur Embryologie amphimiktischer Potentillen. Ber. Schweiz, bot. Ges. 55, 19-32 (1945b).Google Scholar
  519. Über Kreuzungsversuche mit pseudogamen Potentillen. 6. Jber. Schweiz. Ges. Vererb. S. S. G. Arch. Klaus-Stift, Vererb.-Forsch. 21, 469-472 (1946).Google Scholar
  520. Untersuchungen über die Genetik der Aposporie bei pseudogamen Potentillen. Experientia (Basel) 3, 204 (1947).Google Scholar
  521. Pseudogamie und Polymorphic in der Gattung Potentilla, Arch. Klaus-Stift. Vererb.-Forsch. 23, 267-424 +2 pl. (1948).Google Scholar
  522. Untersuchungen über Pseudogamie und Sexualität einiger Potentillen. Ber. Schweiz. bot. Ges. 59, 409-419 (1949).Google Scholar
  523. Die Entwicklungserregung des Endosperms bei pseudogamen Ranunculusarten. Mitt. naturforsch. Ges. Schaffhausen 25, 1-45 + 5 Taf. (1953/54).Google Scholar
  524. Entwicklungserregung der Eizelle bei pseudogamen Arten der Gattung Ranunculus. Bull. Schweiz. Akad. med. Wiss. 10, Fase. 6, 491-512 (1954).Google Scholar
  525. Cytogenetik des Endosperms. Ber. Schweiz, bot. Ges. 66, 318-336 (1956).-Untersuchungen über die Evolution pseudogamer Arten. Ber. Schweiz. Bot, Gesellsch. 70, 113-125 (1960).Google Scholar
  526. Genetik der Pseudogamie bei Ranunculus auricumus s. 1. W. Koch. Ber. Schweiz, bot. Ges. 75, 157–182 (1966).Google Scholar
  527. Rutishauser, A., u. H. R, Hunziker: Untersuchungen über die Zytologie des Endosperms. Arch. Klaus-Stift. Vererb.-Forsch. 25, 477–483 (1950).Google Scholar
  528. Weitere Beiträge zur Genetik der Aposporie pseudogamer Potentillen. Arch. Klaus-Stift, Vererb.-Forsch. 29, 223-233 (1954).Google Scholar
  529. Rychlewski, J.: Studia cytoembriologiczne nad apomiktycznym gatunkiem Nardus strieta L. Cytological studies in the apomictic species Nardus strieta L. Acta biol. cracov. Ser. Bot, 4, 1–23 (1961).Google Scholar
  530. Sachar, R, C., and R, N. Chopra: A study of the endosperm and embryo in Mangifera L. Indian J. Agric. Sci. 27, 219–228 (1957).Google Scholar
  531. Sachar, R, C., and P. Murgai: Embryology of Aerva tomentosa Forsk. Current Sci. (Delhi) 27, 105–106 (1958).Google Scholar
  532. Sakai, K.: Studies on the chromosome number in Alpine plants. I. J. Genet. 9, 226–230 (1934).Google Scholar
  533. Sax, H. J.: Polyploidy and apomixis in Cotoneaster. J. Arn. Arb., Bol. 35, 334–365 (1954).Google Scholar
  534. Sax, K.: The origin and relationships of the Pomoideae. J. Arn. Arb. 12, 3–22 (1931).Google Scholar
  535. Chromosome relationships in the Pomoideae. J. Arn. Arb. 13, 363-367 (1932).Google Scholar
  536. The cytogenetics of facultative apomixis in Malus species. J. Arnold Arboretum Harvard Univ. 40, 289-297 (1959).Google Scholar
  537. Schlimbach, H.: Beiträge zur Kenntnis der Samenanlagen und Samen der Amaryliidaceen mit Berücksichtigung des Wassergehaltes der Samen. Flora (Jena) 117, 41–54 (1924).Google Scholar
  538. Schnarf, K.: Beobachtungen über die Endospermentwicklung von Hieracium aurantiacum. S.-B. Akad. Wiss. Wien, math.-nat. Kl. I 128, 755–771 (1919).Google Scholar
  539. Embryologie der Angiospermen. In: Handbuch der Pflanzenanatomie. 690 pp. 1929.Google Scholar
  540. Schoch, M.: Entwicklungsgeschichtlich-cytologische Untersuchungen über die Pollenbildung und Bestäubung bei einigen Burmannia-Arten. Diss. Zürich 1920. 95 pp.Google Scholar
  541. Schürhoff, P. N.: Zur Apogamie von Calycanthus. Flora (Jena) 116, 73–84 (1923).Google Scholar
  542. Schürhoff, P. N., and F. J. Jüssen: Nuzellarembryonie bei Spathiphyllum Patinii (Hogg.) N.E. Br. Ber. dtsch. bot. Ges. 43. 454–456 (1925).Google Scholar
  543. Sernander, R.: Zur Morphologie und Biologie der Diasporen. N. Act, Reg. Soc. Sci. Upsal., Vol. extra ordin, edit, 1927.Google Scholar
  544. Shama Kumari, K.: Cytogenetic investigations in Paniceae: Occurrence of apospory in a diploid species of Panicum-Panicum antidotale Retz. Current Sci. 29. 191 (1960).Google Scholar
  545. Shibata, K., u. K. Miyake: Über Parthenogenesis bei Houttuymia cordata. Bot. Mag. (Tokyo) 22, 141–144 (1908).Google Scholar
  546. Shimotomai, N.: Chromosomenzahlen und Phylogenie bei der Gattung Potentilla. Hiroshima Univ. J. Sci. B Div. 2, 1. 1–11 (1930).Google Scholar
  547. Siebold. C. Th. E. v.: Wahre Parthenogenesis bei Schmetterlingen und Bienen. Leipzig 1856. Cited after Braun 1857.Google Scholar
  548. Simonet, M. et Ch. Miedzyrzecki: Étude caryologique de quelques espèces arborescentes ou sarmenteuses d’ornement, C. R. Soc. Biol. (Paris) 111, 969–973 (1932).Google Scholar
  549. Singh, A. P.: Intergenetic cross of Dichantium annulatum with Bothriochloa ischaemum. Cytologia (Kyoto) 30, 54–57 (1965).Google Scholar
  550. Singh, A. P., and K. L. Mehra: Cytological analysis of hybrids within the Dichantium annulatum complex. Cytologia (Kyoto) 30, 307–316 (1965).Google Scholar
  551. Skalinska, M.: Cyto-ecological studies in Poa alpina L. var. vivipara L. Bull. Acad. Polon. Sci. et Lett., Sci. Math. et Nat. B Sci. Nat. (1) 253–283 + 1 pi. (1952).Google Scholar
  552. Poa nobilis n. sp., a new viviparous species of the High Tatra. Acta Soc. Bot. Pol. 24, No 4, 749-761 (1955).Google Scholar
  553. Embryological studies in Poa granitica Br. Bl., an apomictic species of the Carpathian range. Acta biol. cracov., Ser. bot. 2, 91-110 + 7 pl. (1959).Google Scholar
  554. Skalinska, M., and R. Czapik: Studies in the cytology of the genus Potentilla. Acta Biol. cracov., Ser. bot. 1, 137–149 (1958).Google Scholar
  555. Skawinska, R.: Apomiksja u Hieracium alpinum L. Apomixis in Hieracium alpinum L. Acta biol. cracov. 5, 90–96 (1962).Google Scholar
  556. Skovsted, A.: Cytological studies in the tribe Saxifrageae. Dansk bot. Ark. 8(5), 1–52 (1934).Google Scholar
  557. Smith, B.W.: Hybridity and apomixis in the perennial grass, Paspalum dilatatum. Genetics 33, 628–629 (1948).PubMedGoogle Scholar
  558. Smith, G.L.: Studies in Potentilla L. 1. Embryological investigations into the mechanism of agamospermy in British P. Tabernaemontani Aschers. New Phytologist 62, 264–282 (1963).CrossRefGoogle Scholar
  559. Studies in Potentilla L. II. Cytological aspects of apomixis in P. Crantzii (CR.) Beck ex fritisch. New Phytologist 62, 283-300 (1963).Google Scholar
  560. Smith, J.: Notice of a plant which produces seeds without any apparent action of pollen. Meeting of June 18th 1839. Trans. Linn. Soc. London 18 (1841). Cited after Braun 1857.Google Scholar
  561. Snyder, L. A.: Apomixis in Paspalum secans. Amer. J. Bot. 44, 318–324 (1957).CrossRefGoogle Scholar
  562. Snyder, L. A., and J. R. Harlan: A cytological study of Bouteloua gracilis from western Texas and eastern New Mexico. Amer. J. Bot. 40, 702–707 (1953).CrossRefGoogle Scholar
  563. Snyder, L. A., A. R. Hernandez and H. E. Warmke: The mechanism of apomixis in Pennisetum ciliare. Bot. Gaz. 116, 209–221 (1955).CrossRefGoogle Scholar
  564. Söderberg, E.: Über die Chromosomenzahl von Houttuynia cordata. Svensk. bot. Tidskr. 21, 247–250 (1927).Google Scholar
  565. Bemerkungen zur Nomenklatur der parthenogenetischen Erigeron-Arten. Svensk bot. Tidsskr. 23, 261-262 (1929).Google Scholar
  566. Sörensen, Th.: Ranunkelstudier. II. Om variation og nedarvningsforhold hos Ranunculus auricomus L. Bot. Tidsskr. 44, 433–438 (1938).Google Scholar
  567. Sexual chromosome aberrants in triploid apomictic Taraxaea. Sv. Bot. Tidskr. 54, 1-22 (1958).Google Scholar
  568. Sörensen, Th., and G. Gudjónsson: Spontaneous chromosome aberrants in apomictic Taraxaea. Kong, danske Vid. Selsk. Biol. 4(2), 1–48 (1946).Google Scholar
  569. Sokolowska-Kulczycka, A.: Apomiksja u Leontopodium alpinum Cass. Apomixis in Leontopodium alpinum Cass. Acta biol. cracov., Ser. bot. 2, 51–63 2 pl. (1959).Google Scholar
  570. Sprecher, M.A.: Étude sur la sémence et la germination du Garcinia mangostana L. Rev. gén. Bot. 31, 513–531, 611-634 (1919).Google Scholar
  571. Stebbins jr., G. L.: Cytology of Antennaria. I. Normal species. Bot. Gaz. 94, 134–151 (1932a).Google Scholar
  572. Cytology of Antennaria. II. Parthenogenetic species. Bot. Gaz. 94, 322-344 (1932b).Google Scholar
  573. New species of Antennaria from the Appalachian region. Rhodora 37, 229-237 (1935).Google Scholar
  574. Apomixis in the angiosperms. Bot. Rev. 7, 507-542 (1941).Google Scholar
  575. Variation and evolution in plants. 643 pp. 1950.Google Scholar
  576. Stebbins, G. L., and J. A. Jenkins: Aposporie development in the North American species of Crepis. Genetica 21, 191–224 (1939).CrossRefGoogle Scholar
  577. Stenar, H.: Studien über die Entwicklungsgeschichte von Nothoscordum fragransiKunth und N. striatum Kunth. Svensk bot. Tidskr. 26, 25–44 (1932a).Google Scholar
  578. Parthenogenesis in der Gattung Calamagrostis. Ark. Bot. A 25 (6), 1-8 (1932b).Google Scholar
  579. Strasburger, Ed.: Über Polyembryonie. Jena. Z. Naturw. 12, 647–670 (1878).Google Scholar
  580. Streetman, L. J.: Reproduction of the lovegrasses, the genus Eragrostis-I.E. Chloromelas steud., E. Curvula (Schrad.) Nees, E. Lehmanniana Nees and E. Superba Peyr. Wrightia 3, 41–51 (1963).Google Scholar
  581. Subba Rao, A. M.: Studies in the Malphigiaceae. I. Embryo sac development and embryogeny in the genera Hiptage, Banisteria and Stigmatophyllum. J. Indian bot. Soc. 18, 145–156 (1940). Cited after Biol. Abstr. 15, 19328 (1941).Google Scholar
  582. Suessenguth, K.: Über die Pseudogamie bei Zygopetalum Mackayi Hook. Ber. dtsch. bot. Ges. 41, 16–23 (1923).Google Scholar
  583. Sukacev, V. N.: Polymorphismus und Apomixis bei Arten der Gattung Adenophora. J. Bot. URSS. 25, 297–303 (1940). Cited after Bot. Zbl. 85, 168 (1941/42).Google Scholar
  584. Suto, T.: List of chromosome number and idiogram types in Liliaceae and Amaryllidaceae. Jap. J. Genet. 12, 107–112, 157-162, 221-231 (1936).Google Scholar
  585. Swamy, G. L.: The embryology of Zeuxine sulcata Lindl. New Phytologist 45, 132–136 (1946a).CrossRefGoogle Scholar
  586. Embryology of Habenaria. Proc. nat. Inst. Sci. India 12 (8), 413-426 (1946b).Google Scholar
  587. Swamy, R.: Culture of nucellar tissue of Citrus in vitro. Experientia (Basel) 14, 111–112 (1958).CrossRefGoogle Scholar
  588. In vitro culture of nucellus and embryos of Citrus. Mod. Develop. Plant Physiol. (P. Maheshwari, ed.). University of New Delhi, India, 104-105 (1958).Google Scholar
  589. Täckholm, G.: Zytologische Studien über die Gattung Rosa. Acta Horti Berg. 7, No 3, 97–381 (1922).Google Scholar
  590. Tahara, M.: Cytologische Studien an einigen Kompositen. Imp. Univ. Tokyo, J. Coll. Sci. 43(7), 1–51 (1921).Google Scholar
  591. Tinney, F. W.: Cytology of parthenogenesis in Poa pratensis. J. agric. Res. 60, 351–360 (1940).Google Scholar
  592. Tischler, G.: Pflanzliche Chromosomenzahlen. Nachtrag Nr 2, Teil I and II. Tab. Biol. Period.V/VT, 1935/36.Google Scholar
  593. Tiwary, N. K.: On the oecurence of polyembryony in the genus Eugenie. J. Indian bot. Soc. 5 (1926). Cited after Pijl 1934.Google Scholar
  594. Further observations on the seeds and seedlings of Eugenia JambolanaiLamk. J. Indian bot. Soc. 8 (1929). Cited after Pijl 1934.Google Scholar
  595. Toxopeus, H. J.: Die Züchtung von Unterlagen für Citrus sinensis Osb. immun gegen Phytophthora parasitica, die Ursache der “gumdisease” in Japan. Züchter 8, 1–10 (1936).Google Scholar
  596. Traub, H. P.: Artificial control of nucellar embryony in Citrus. Science 83, 165–166 (1938).CrossRefGoogle Scholar
  597. Triplett, E. L.: Cytology of Poa hybrids. Carnegie Inst, Wash., Year Book 52, 173–174 (1953).Google Scholar
  598. Tschermak-Woess, E.: Diploides Taraxacum vulgare in Wien und Niederösterreich. Öst. bot. Zeitschr. 96, 56–63 (1949).CrossRefGoogle Scholar
  599. Turesson, G.: Studien über Festuca ovina L. I. Xormalgeschlechtliche, halb-und ganzvivipare Typen nordischer Herkunft. Hereditas (Lund) 8, 161–206 (1926).CrossRefGoogle Scholar
  600. Studien über Festuca ovina L. II. Chromosomenzahl und Viviparie. Hereditas (Lund) 13, 177-184 (1930).Google Scholar
  601. Studien über Festuca ovina L. III. Weitere Beiträge zur Kenntnis der Chromosomenzahlen viviparer Formen. Hereditas (Lund) 15, 13-16 (1931).Google Scholar
  602. Chromosome stability in Linnean species. Ann. agric. Coll. Sweden 5, 405-416 (1938).Google Scholar
  603. Variation in the apomictic microspecies of Alchemilla vulgaris L. Bot. Xot. (Lund) 96, 413-427 (1943).Google Scholar
  604. Variation in the apomictic microspecies of Alchemilla vulgaris L. II. Progeny tests in agamotypes with regard to morphological characters. Bot. Not. (Lund) 109, 400-404 (1956).Google Scholar
  605. Variation in the apomictic microspecies of Alchemilla vulgaris L. III. Geographical distribution and chromosome number. Bot. Xot. (Lund) 110, 413-422 (1957).Google Scholar
  606. Observations on some clones and clone progenies in Alchemilla alpina L. Bot. Xot. (Lund) 111, 159-164 (1958).Google Scholar
  607. Turesson, G., and B.: Experimental studies in Hieracium pilosella L. I. Reproduction, chromosome number and distribution. Hereditas (Lund) 46, 717–736 (1960).CrossRefGoogle Scholar
  608. Observations on chromosome number and reproduction in some piloselloids. Bot. Xot. (Lund) 116, 157-160 (1963).Google Scholar
  609. Turrill, W. B.: Material for a study of taxonomic problems in Taraxacum. Bot. Soc. Exch. Club. Brit. Isl. 11, 570–589 (1938).Google Scholar
  610. Tysdal, H. M.: Apomictic interspecific hybrids are promising for rubber production from guayule. Agron. J. 42, 351–359 (1950).CrossRefGoogle Scholar
  611. Uhring, J., and S. L. Emsweller: Parthenogenesis in tetraploid Lilium Longiflorum. Amer. J. Bot. 49, 9 (1962).Google Scholar
  612. Urbańska, K.: Cytologia Antennaria carpatica i A. dioica. Cytology of Antennaria carpatica and A. dioica. Acta biol. cracov., Ser. bot. 2, 43–49 (1959).Google Scholar
  613. Urbańska-Worytkiewicz, K.: Badania embriologiczne nad rodzajem Antennaria Gaertn. I. Rozwój zalažków A. carpatica (Wahlb.) Bl. et Fing. Embryological investigations in Antennaria Gaertn. I. Development of the ovules of A. carpatica (Wahlb.) Bl. et Fing. Acta biol. cracov., Ser. bot. 4, 49–64 (1961).Google Scholar
  614. Badania embriologiczne nad rodzajem Antennaria Gaertn. II. Rozw ój pylku A. carpatica Bl. et Fing. Embryological investigations in Antennaria Gaertn. Development of the pollen of A. carpatica Bl. et Fing. Acta biol. cracov. 5, 97-102 (1962).Google Scholar
  615. Badania embriologiczne nad rodzajem Antennaria Gaertn. III. Mieszarice eksperymentale pomiedzy A. carpatica Bl. et Fing, i A. dioica (L.) Gaertn. Embryological investigations in Antennaria Gaertn. III. Experimental hybrids between A. carpatica Bl. et Fing, and A. dioica (L.) Gaertn. Acta biol. cracov. 5, 103-115 (1962).Google Scholar
  616. Badania cytologiczne nad doswiadczalnymi mieszancami pomiedzy Antennaria carpatica (Wahlb.) Bl. et Fing, i A. dioica (L.) Gaertn. Cytological studies in experimental hybrids between Antennaria carpatica (Wahlb.) Bl. et Fing, and A. dioica (L.) Garten. Acta biol. cracov. 5, 51-61 (1965).Google Scholar
  617. Vignoli, L.: Cariologia del genere Agave. Lav. Ist. Bot. Palermo 7, 1–44 (1936).Google Scholar
  618. Cariologia del genere Agave. Xota II. Lav. Ist. Bot. Palermo 8, 1-6 (1937a).Google Scholar
  619. Grandezza cellulare e poliploidia in Agave. Lav. Ist. Bot. Palermo 8, 88-106 (1937b).Google Scholar
  620. Waldo, G. F., and G. M. Darrow: Origin of the logan and the mammoth blackberries. J. Hered. 39, 99–107 (1948).Google Scholar
  621. Warmke, H. E.: Cytotaxonomic investigations of some varieties of Panicum maximumiand P. purpurascens in Puerto Rico. Agron. J. 48, 143–491 (1951).CrossRefGoogle Scholar
  622. Apomixis in Panicum maximum. Amer. J. Bot. 41, 5-11 (1954).Google Scholar
  623. Watson, P. J.: The distribution in Britain of diploid and tetraploid races within the Festuca ovina group. New Phytologist 57, 11–18 (1958).CrossRefGoogle Scholar
  624. Watson, P. J., and J. Clausen: Phenotypic responses to contrasting environments in the genus Poa. iScott. Plant Breed. St. Pentlandfield, Rep. 1961, 64-78.Google Scholar
  625. Watson, W. C. R.: Handbook of the Bubiiof Great Britain and Ireland. [Cambridge 1958.Google Scholar
  626. Weber, J. M.: Polyembryony. Bot. Rev. 6, 575–598 (1940).CrossRefGoogle Scholar
  627. Werber, H. J.: The economic importance of apogamy in Citrus and Mangifera. Proc. Amer. Soc. Hort. Sci. 28, 57–61 (1931).Google Scholar
  628. Wicherley, P. R.: Proliferation of spikelets in British grasses. Watsonia 3, 41–56 (1953).Google Scholar
  629. Wiger, J.: Ein neuer Fall von autonomer Xuzellarpolyembryonie. Bot. Not. (Lund) 83, 368–370 (1930).Google Scholar
  630. Embryological studies on the families Buxaceae, Meliaceae, Simarubaceae and Burseraceae. Diss. Lund 1935. 130 pp.Google Scholar
  631. Winkler, H.: Über Parthenogenesis und Apogamie im Pflanzenreiche. Progr. nei Bot. 2, 293–454 (1908).Google Scholar
  632. Woodworth, H.H.: Cytological studies in the Betulaceae. III. Parthenogenesis and polyembryony in Alnus rugosa. Bot. Gaz. 89, 402–409 (1930).CrossRefGoogle Scholar
  633. Yong, D. P.: Autogamous Epipactis in Scandinavia. Bot. Not. (Lund) 106, 233–270 (1953).Google Scholar
  634. Youngner, V. B.: Environmental control of initiation of the inflorescence, reproductive structures, and proliferations in Poa bulbosa. Amer. J. Bot. 47, 753–757 (1960).CrossRefGoogle Scholar
  635. Zarubin, A. F.: Possibility of parthenogenesis in walnut and black walnut. Priroda No 10, 64-65 (1949).Google Scholar
  636. Zeilinga, A. E.: Polyploidy in CotoneasteriBot, Not. (Lund) 117, 262–278 (1964).Google Scholar
  637. Zinger, X. V. V. A. Poddubnaja-Arnoldi. T. P. Petrovskaya, and N. N. Polunina: To the question of the causes of apomixis. Transact. Moscow Soc. Nat. 13, 201–237 (1965).Google Scholar

Copyright information

© Springer-Verlag Berlin · Heidelberg 1967

Authors and Affiliations

  • Axel Nygren

There are no affiliations available

Personalised recommendations