Plant Systematics and Evolution

, Volume 175, Issue 3–4, pp 161–223 | Cite as

The phylogeny and evolution of thePterygodium—Corycium complex (Coryciinae, Orchidaceae)

  • H. Kurzweil
  • H. P. Linder
  • P. Chesselet
Article

Abstract

The leaf-anatomy, palynology, seed-morphology, vegetative morphology and especially the highly complicated floral morphology of theCoryciinae s. str. (Diseae: Orchidoideae: Orchidaceae) are described and illustrated in detail. On the basis of these characters the presumed phylogeny, based on a rigorous cladistic analysis, is presented. The cladistic biogeographical analysis of theCoryciinae s. str. shows that it is a member of the Afrotemperate Track, with a pattern of vicariance events typical of the members of this track. An analysis of the patterns of speciation shows that allopatric speciation appears to be rare, and that parapatric speciation across edaphic boundaries may be the most important factor. Proceeding from the information presented, a new classification of the group is proposed in which we recognize the four generaCeratandra, Evotella, Pterygodium andCorycium. The new monotypic genusEvotella comprises a species originally described asPterygodium rubiginosum. The three species of the genusAnochilus are transferred toCorycium andPterygodium. P. magnum, which was originally described asPterygodium but was transferred toCorycium lately, is placed in a monotypic section ofPterygodium.

Key words

Angiosperms Orchidaceae Coryciinae Ceratandra Evota Evotella Ommatodium Pterygodium Anochilus Corycium Morphology phylogeny cladistics phytogeography speciation classification Flora of southern Africa 

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • H. Kurzweil
    • 1
  • H. P. Linder
    • 1
  • P. Chesselet
    • 1
  1. 1.Bolus HerbariumUniversity of Cape TownRondeboschSouth Africa
  2. 2.Grassland Research CenterLynn EastSouth Africa

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