Cleisostoma duplicilobum (J.J. Sm.) Garay 1972 SECTION Paniculatum Seiden 1975 Photo by © Peter O'Byrne, and The Swiss Orchid Foundation at the Jany Renz Herbarium Website

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Plant and Inflorescence Photos by © Milan Vágner

Another Flower? Photo by © Karel & Alex Petrzelka and the Vietnam Orchid Website

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Common Name The Double Lobed Cleisostoma

Flower Size .4" [1 cm]

Found in Thailand, Laos, Vietnam, Java, Sumatra, and Borneo on trees in montane forests at elevations around 400 to 2000 meters as a medium sized, hot to cool growing epiphyte with an elongate, slender stem carrying 2 rows of oblong to strap shaped, apically obtuse and unequally bilobed leaves that blooms in the spring on a horizontal to pendulous, 1 to 3 branched, 8" [20 cm] long, green, streaked purple, successively to 15 per branch many flowered inflorescence.

C duplicilobum and C rostellatum are very similar but differ in that C rostellatum has protuberences at the mid lobe of the lip and this species does not. but differs in the protuberences on the lip mid lobe which C rostellatum has.

Synonyms Cleisostoma carinatum (Rolfe ex Downie) Garay 1972; Garayanthus carinatus (Rolfe ex Downie) Szlach. 1995; Garayanthus duplicilobus (J.J.Sm.) Szlach. 1995; Sarcanthus carinatus Rolfe ex Downie 1925; *Sarcanthus duplicilobus J.J. Sm. 1907; Sarcanthus rostellatus Ridl. 1900

References W3 Tropicos, Kew Monocot list , IPNI ; The Orchids of Thailand Seidenfaden & Smitinand 1959 as Sarcanthus carinatus Drawing fide; Dansk Botanisk Arkiv Bind 29 Nr. 3 Orchid Genera in Thailand II Seidenfaden 1975; Die Orchideen lieferung 21 Schlechter/Brieger 1989 drawing fide; Orchids of Java Comber 1990 photo fide; A Checklist of the Orchids of Borneo Wood & Cribb 1994; Oasis Vol 1 No 3 2000 photo; Orchids of Sumatra Comber 2001; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 photo ok; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo ok; The Wild Orchids in Yunnan Xu Xiang Ye & Liu 2010 photos fide; Malesian Orchid Journal Vol 5 2010 photo/drawing; Wild Orchids of Penninsular Malaysia Ong, O'Byrne, Yong & Saw 2011 photo good; Philippine Native Orchid Species Cootes 2011 photo good; A to Z of South East Asian Orchid Species Vol 2 O'Byrne 2011 photo fide; Malesian Orchid Journal Vol 9 2012 photo fide; Genera Orchidacearum Vol 6 Epidendrodeae Pt 3 Pridgeon, Cribb, Chase and Rasmussen 2014 photo fide; Taiwania 60(3):107-116, 2015 - New species of the genus Cleisostoma in the flora of Vietnam Averyanov, Tich and Canh

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