Monotypic genus, established by A. S. Rao & D. M. Verma in 1969. It is distinctive in its elongated leafy stem, contemporaneous with the radical spikes and is rather lax. Each bract suspends a single bracteolate flower. In India the genus is endemic to Assam. .
New distributional record for India, Nicobar Islands.The genus Plagiostachys was established by Ridley (1899). Presently, the genus includes 19 species (Newman et al., 2004), mainly distributed in China and South-east Asia. Present discovery shows that the flora of Nicobar islands is more close to that of Malaysia than to that of Myanmar, Thailand or India.
Usually epiphytic. Inflorescence terminal on a leafy shoot with bright red bracts each saftending one orange flower. Lateral staminodes absent and the labellum reduced to a small tooth at the base of the filament. This genus is represented by 6 species distributed in Myanmar, India and South China. This genus is known in India by only its type species ie., Rhynchanthus longiflorus Hook. f.
A temperate genus with 17 species growing in the Himalayan mountain ranges from Kashmir to Meghalaya, Tibet and Western China at 1200 - 5000 m altitudes. The genus is closely allied to Cautleya Hook.. Small herbs with leafy shoot from an erect, rhizome. Flowers in terminal spike, bracts free, flowers purplish.In India 5 species are reported of which 3 are endemic.
New distributional record for India. The genus Stahlianthus Kuntze is recorded for the first time from India. S. involucratus is recorded from Assam, Meghalaya and Nagaland. The genus is characterized by the possession of an involucre of two bracts fused at the base, forming a bell-like structure, the emarginate or only shortly bifid labellum and the absence of epigynous glands.
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