Journal of Plant Research

, Volume 114, Issue 1, pp 75–92 | Cite as

Ovules and Seeds in Subfamily Phyllanthoideae (Euphorbiaceae): Structure and Systematic Implications

  • Toru Tokuoka
  • Hiroshi Tobe


) are distinct from the rest of the subfamily in having a thick inner integument (over six cells thick), an exotegmen composed of cuboidal cells (type II), and vascular bundles in the outer integument and, as molecular evidence also suggests, should be transferred to a separate family Putranjivaceae. Hymenocardieae (Didymocistus and Hymenocardia), whose positions have been controversial, are monophyletic in sharing endotestal seeds with a collapsed exotegmen which is unknown elsewhere in Euphorbiaceae. The genera seem to require separation from the Euphorbiaceae. In addition, a morphological heterogeneity of the two large genera Cleistanthus and Phyllanthus, as well as of tribe Antidesmeae subtribe Scepinae were also discussed.

Keywords: Embryology, Euphorbiaceae, Ovule, Phyllanthoideae, Seed 


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Copyright information

© The Botanical Society of Japan 2001

Authors and Affiliations

  • Toru Tokuoka
    • 1
  • Hiroshi Tobe
    • 2
  1. 1.Department of Natural Environmental Sciences, Faculty of Integrated Human Studies, Kyoto University, Kyoto, 606–8501 JapanJP
  2. 2.Department of Botany, Graduate School of Science, Kyoto University, Kyoto, 606–8502 JapanJP

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