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Classification Above the Genus, as Exemplified by Gesneriaceae, With Parallels From Other Groups

  • B. L. Burtt
Part of the Plant Systematics and Evolution / Entwicklungsgeschichte und Systematik der Pflanzen book series (SYSTEMATICS, volume 1)

Abstract

Gesneriaceae is used as the starting point for a consideration of some aspects of classification between family and genus. Gesneriaceae may be split into two subfamilies, one with normal cotyledons, the other with one cotyledon becoming enlarged after germination: a parallel is drawn with the use of the plane of foliar distichy in Zingiberaceae .In both cases the resulting improvements are shown to be vital to the clear recognition and statement of evolutionary problems.

The status of Klugieae, one of the 4 tribes of Gesneriaceae-Cyrtandroideae is re-examined and its elevation to subfamily is discussed in relation to the system of the family. There is a rather general trend against simple dichotomy at subfamily level, but its retention in Gesneriaceae is recommended. The complexity of various classifications between family and genus is assessed by use of the ratio between number of genera and the rank immediately above (terminal suprageneric taxa) and the number of the latter that are monogeneric. When these ratios are too low a system looses much of its practical value.

The treatment of possible linking genera between major groups is discussed in relation to Jerdonia (Scrophulariaceae/Gesneriaceae) and Triplostegia (Dipsacaceae/Valerianaceae). The existence of such links does not justify the union of the families. In contrast, new evidence confirms the very close relationship of Selaginaceae to Scrophulariaceae tribe Manuleeae. This is not dependent on a small linking genus: the affinity is much closer than is that of Manuleeae to most other tribes of Scrophulariaceae, and the reduction of Selaginaceae to tribal rank must therefore be upheld.

Keywords

Flowering Plant World Genus Simple Dichotomy Family Rank Foliage Leaf 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Bentham, G., and Hooker, J. D., 1876: Genera Plantarum, 2. London: Reeve, and Williams & Norgate.Google Scholar
  2. Brenan, J. P. M., 1966: The classification of Commelinaceae. Journ. Linn. Soc. Bot. 59, 349–370.CrossRefGoogle Scholar
  3. Burtt, B. L., 1963: Studies in the Gesneriaceae of the Old World: XXIV: Tentative keys to the tribes and genera. Notes Roy. Bot. Gard. Edinb. 24, 205–220.Google Scholar
  4. Burtt, B. L., 1970: op. cit.: XXXI: Some aspects of functional evolution. Notes Roy. Bot. Gard. Edinb. 30, 1–10.Google Scholar
  5. Burtt, B. L., 1975: op. cit.: XL: The genus Loxostigma Notes Roy. Bot. Gard. Edinb. 34, 101–105.Google Scholar
  6. Burtt, B. L., and Olatunji, O.A., 1972: The limits of the tribe Zingibereae Notes Roy. Bot. Gard. Edinb. 31, 167–169.Google Scholar
  7. Don, G., 1838: A general history of dichlamydeous plants, 4, 643–665. London: Rivington et al.Google Scholar
  8. Dyer, R. A., 1975: Genera of South African flowering plants 1, 558. Pretoria: Dept. of Tech. Agric. Services.Google Scholar
  9. Fritsch, K., 1894–1895: Gesneriaceae. In: Die natürlichen Pflanzenfamilien (Engler und Prantl), IV, 3 b, 133–185. Leipzig: Engelmann.Google Scholar
  10. Grant, V., 1950: The protection of the ovules in flowering plants. Evolution 4, 179–201.CrossRefGoogle Scholar
  11. Hilliard, O. M., and Burtt, B. L., 1977: Notes on some plants of southern Africa, chiefly from Natal: VI. Notes Roy. Bot. Gard. Edinb. 35, 155–177.Google Scholar
  12. Holltum, R. E., 1950: The Zingiberaceae of the Malay Peninsula. Gard. Bull. Singapore 13, 1–249.Google Scholar
  13. Hutchinson, J., 1926: The families of flowering plants 1, 308. London: Macmillan.Google Scholar
  14. Ivanina, L. I., 1967: The family Gesneriaceae (the carpological review). Leningrad: The Academy of Sciences of the USSR (In Russian).Google Scholar
  15. Johnson, L. A. S., and Briggs, B., 1975: On the Proteaceae—the evolution and classification of a southern family. Bot. Journ. Linn. Soc. 70, 83–182.CrossRefGoogle Scholar
  16. Junell, S., 1961: Ovarian morphology and taxonomical position, of Selagineae. Svensk Bot. Tidskr. 55, 168–192.Google Scholar
  17. Leroy, J. F., 1976: Essais de taxonomie syncrétique: I: Etude sur les Meliaceae de Madagascar. Adansonia sér. 2, 16, 167–203.Google Scholar
  18. Loesener, T., 1930: Zingiberaceae In: Die natürlichen Pflanzenfamilien (Engler und Prantl), 2. Aufl., 15 A, 541–640. Leipzig: Engelmann.Google Scholar
  19. Pennington, T. D., and Styles, B. T., 1975: A generic monograph of the Meliaceae Blumea 22, 419–540.Google Scholar
  20. Schumann, K., 1904: Zingiberaceae. In: Das Pflanzenreich (Engler), Heft 20. Leipzig: Engelmann.Google Scholar
  21. Thorne, R. F., 1968: Synopsis of a putatively phylogenetic classification of the flowering plants. Aliso 6, 57–66.Google Scholar
  22. Weber, A., 1975: Beiträge zur Morphologie und Systematik der Klugieae und Loxonieae (Gesneriaceae): I: Die Spross- und Inflorescenzorganisation von Monophyllaea R. Br. Bot. Jahrb. 95, 174–207.Google Scholar
  23. Weber, A., 1976: Op. cit. II: Morphologie, Anatomie und Ontogenese der Blüte von Monophyllaea R. Br. Bot. Jahrb. 95, 435–454.Google Scholar
  24. Weisse, A., 1932: Zur Kenntnis der Blattstellungsverhältnisse bei den Zingiberaceen. Ber. dtsch. bot. Ges. 50 A, 327–366.Google Scholar
  25. Weisse, A., 1933: Die Art der Distichie an den Achsensprossen von Zingiber. Ber. dtsch. bot. Ges. 51, 13–20.Google Scholar
  26. Wettstein, R. Von, 1891–1893: Scrophulariaceae In: Die natürlichen Pflanzenfamilien (Engler und Prantl), IV, 3 b, 39–107. Leipzig: Engelmann.Google Scholar
  27. Wight, R., 1848: Icones plantarum Indiae orientalis 4 (2), 10, t. 1352. Madras: The author.Google Scholar
  28. Wimmer, F., 1957: Campanulaceae-Lobelioideae In: Das Pflanzenreich (Engler), Heft 107 Berlin: Akademie Verlag.Google Scholar

Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • B. L. Burtt
    • 1
  1. 1.Royal Botanic GardenEdinburghScotland, UK

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