Polystachyinae is a subtribe within the tribe Vandeae in family Orchidaceae. It consists of 2 genera and about 228 known species. The type genus of this subtribe is Polystachya. The group is pantropical, being native to tropical Africa primarily, but also to tropical America.[1] Members of this group are epiphytic and are distinguished from the other subtribes in the tribe Vandeae by their sympodial growth habit and the presence of four pollinia. Pollination is mostly by small species of bees, however some species (e.g. Polystachya concrete) exhibit auto-pollination.[2]
| Polystachyinae | |
|---|---|
| |
| Polystachya camaridioides, a member of the type genus Polystachya | |
_BHL.jpg)
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| Botanical illustration of Hederorkis scandederis, which is a member of the second genus (Hederorkis) of the subtribe | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Epidendroideae |
| Tribe: | Vandeae |
| Subtribe: | Polystachyinae Schlechter |
| Type genus | |
| Polystachya Hook. | |
Genera
editGenera in this subtribe are listed below:
- Hederorkis Thouars, 1809 (2 sp.)
- Polystachya Hook., 1824 (224 spp.)
Phylogeny
editThe subtribe Polystachyinae is the sister group to the remaining subtribes of Vandeae s.l.:[3]
| Vandeae s.l. |
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References
edit- ^ Dressler, Robert L. Phylogeny and classification of the orchid family. (1993). p. 128. Cambridge University Press.
- ^ Cingel, Nelis A. An Atlas of orchid pollination: America, Africa, Asia and Australia. (2001) CRC Press.
- ^ Freudenstein, J. V., & Chase, M. W. (2015). "Phylogenetic relationships in Epidendroideae (Orchidaceae), one of the great flowering plant radiations: progressive specialization and diversification." Annals of botany, 115(4), 665-681.
External links
edit
Media related to Polystachyinae at Wikimedia Commons
Data related to Polystachyinae at Wikispecies
