!Pelatantheria ctenoglossum Ridl. 1896
Photo by © Karel & Alex Petrzelka and the Vietnam Orchid Website
Plant and Flowers from Thailand?
Photos by Manorot Tangsaveepha Copyright ©, and the Butterfly and Orchids Photo Gallery
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EARLY 
Common Name The Spread Hand Lip Pelatantheria - In China Ju Wei Zuan Zhu Lan
Flower Size 1/2" [1.2 cm]
Found in Thailand, Laos and Vietnam in semi-deciduous and deciduous dry lowland forests and savana-like woodlands at elevations of sealevel to 700 meters as a mini-miniature sized, hot to warm growing epiphyte with an elongate, branching stem carrying elliptic-oblong, obtuse, unequally bilobed apically leaves that blooms in the later summer and early fall on an axillary, short, single flowered inflorescence.
This species is often confused with P bicuspidata but this one always has hairs on the apical finger of the lip. P bicuspidata never has hairs on the finger at the apex of the lip and can be forked apically.
Synonyms Cleisostoma lophochilum (Gagnep.) Garay 1972; Sarcanthus lophochilus Gagnep. 1951
References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen Schlechter 1915; The Orchids of Thailand Seidenfaden & Smitinand 1963 drawing fide; Rudolf Schlechter Die Orchideen Band 1B lieferung 21 1165 - 1328 Brieger 1988 photo fide; Opera Botanica # 95 Seidenfaden 1988 drawing/photo fide; Thai Orchid Species Rakpaibulsombat 1992 photo fide; Identification of the Orchids [Orchidaceae Juss.] Vietnam Averyanov 1994; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 photo not = P bicuspidata; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo not = P bicuspidata; Flora of China Vol 25 Zhengyi, Raven & Deyuan 2009; The Wild Orchids in Yunnan Xu Xiang Ye & Liu 2010 photo ok; A to Z of South East Asian Orchid Species Vol 2 O'Byrne 2011 photo fide; Turczaninowia 16(4):26-46 NEW AND RARE ORCHIDS (ORCHIDACEAE) IN THE FLORA OF CAMBODIA AND LAOS Averyanov 2013 ; Genera Orchdiacearum Vol 6 Epidendrodeae Pt 3 Prdgeon, Chase, Cribb & Rasmusen 2014 drawing fide; Turczaninowia 19 (3): 5–58 L. V. Averyanov, Khang Sinh Nguyen etal 2016
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