Zeuxine bidupensis Aver. 2006 Photo by © L. Averyanov and the Hoa Lan Vietnam Website
Common Name The Bi Doup Zeuxine [A town in Vietnam]
Flower Size .4" [1 cm]
Found the eastern Himalayas, Thailand and Vietnam in shaded, humus rich ground in evergreen hill forests and lower montane scrub forests at elevations of 1425 to 2100 meters as a small to just medium sized, cool to cold growing terrestrial with a sometimes branched stem carrying blackish green to reddish green above, dark green to reddish grey beneath, lanceolate to narrowly ovate, slightly oblique, acute to obtuse, minutely mucronate, gradually narrowing below into the sessile to petiolate base leaves that blooms in the fall on an erect, terminal, pubescent, 7.2 to 13.2" [18 to 33 cm] long, several flowered inflorescence with a [3.7 to 8 cm] long, rachis carrying ovate-lanceolate, acuminate, ciliate to glabrous bracts and sessile flowers
Said to be similar to Z agyokuana and may be synonym of and if so then Z agyokuana takes precedence. Also many sources put Z pantlingii as a synonym of this species and if so then this species takes precedence. I have left all three as separate species until better information becomes available.
Synonyms Zeuxine pantlingii Av.Bhattacharjee & H.J.Chowdhery 2006
References W3 Tropicos, Kew Monocot list , IPNI ; Orchids of Southern Ryukyu Islands Garay & Sweet 1974 as Z agyokuana; Flora of China Vol 25 Zhengyi, Raven & Deyuan 2009 as Z agyokuana; Flora of China Vol 25 Illustrations Zhengyi, Raven & Deyuan 2010 drawing fide as Z agyokuana; The Orchids of India A Glimpse Misra 2007 as Z pantlingii; Flora Of Thailand Orchidaceae Vol 12 Part 1 Pedersen, Kurzweil, Suddee & Cribb 2011 drawing/photo fide; Turczaninowia 2011, 14(2) : 15–100 Ormerod/Averyanov 2011