All Floras      Advanced Search
FNA Vol. 26 Page 495, 617 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 26 | Orchidaceae

46. Polystachya Hooker, Exot. Fl. 2: plate 103. 1824.

[Greek poly, many, and stachys, spike, alluding to many branchlets of the inflorescence in some species]

James D. Ackerman

Herbs epiphytic, lithophytic, or terrestrial. Roots velamentous. Stems slender or pseudobulbous, clustered or distant along rhizome. Leaves 1–several, conduplicate, thin [fleshy], leathery. Inflorescences terminal, simple or paniculate racemes with ± secund branches; peduncle enclosed by scarious sheaths. Flowers few to many, mostly not resupinate, generally small; dorsal sepal free; lateral sepals adnate to column foot forming mentum; petals smaller than sepals, free; lip 3-lobed [simple], adnate to and articulate with column foot, forming part of mentum; disc usually callose, pubescent; column semiterete, short; foot distinct; stigmas confluent, transverse under rostellum, viscidium ovate to elliptic; anther terminal, incumbent, operculate; pollinia 4, globose or ellipsoid, hard, waxy, attached to single short stipe. Fruits capsules.

Species 150 (1 in the flora): tropical and subtropical regions, especially rich in Africa; s Florida, Mexico, West Indies, Central America, South America, Asia, Australia, Pacific Islands.

Lower Taxon


Related Objects  

Flora of China  
  • Polystachya.pdf
  • PDF

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |