Coelogyne trinervis Lindl. 1830 SECTION Flaccidea Lindl.
Photo by © David Morris
Photo by © Karel & Alex Petrzelka and the Vietnam Orchid Website
Photo by © David Keuhn
GROW BY BRIAN WHITEHEAD Photo by © Richard Korber
Plant In situ as a lithophyte in the Phuphan mountains in the Northeast of Thailand
Photos by © Ekkehard Schwadtke and his Lanta Orchid Nursery Photo Page
To 
Common Name The Three-Veined Coelogyne [Refers to the nerves on the lip] - in Thailand - U'ang mak
Flower Size 1 3/4" [4 cm]
Found in Myanmar, Thailand, Malaysia, Laos, Cambodia, Vietnam, Java, Lesser Sunda Islands, Mollucas and Sumatra as a medium sized, hot to cool growing epiphyte or lithophyte on trees or rocks at low to moderate elevations of 100 to 1600 meters with ovoid, closely set, longitudinally 4 grooved, oblique, brownish pseudobulbs enveloped basally by a few sheaths and carrying 2, apical, plicate, 3 nerved, acute, gradually narrowing below into the elongate, grooved, petiolate base leaves that blooms in the fall on an erect, to 10" [to 25 cm] long, slender, very slightly fractiflex rachis, few to several [4 to 8] flowered inflorescence arising with a new growth with deciduous floral bracts and has fragrant [some say unpleasant others say light and airy], simultaneously opening flowers
Synonyms Coelogyne angustifolia Ridl. 1897, nom. illeg.; Coelogyne cinnamomea Lindl. 1858; Coelogyne pachybulbon Ridl. 1897; Coelogyne rhodeana Rchb.f. 1867; Coelogyne rossiana Rchb.f. 1884; Coelogyne stenophylla Ridl. 1924; Coelogyne wettsteiniana Schltr. 1920; Pleione rossiana (Rchb.f.) Kuntze 1891; Pleione trinervis (Lindl.) Kuntze 1891
References W3 Tropicos, Kew Monocot list , IPNI ; Orchids of Burma Grant 1895/1995 as C rossiana; Orchids of Burma Grant 1895/1995; Die Orchideen Von Java J.J.Smith 1905 as C cinnamomea; Die Orchideen Von Java Figuren Atlas J.J.Smith 1908 as C cinnamomea drawing fide; Die Orchideen Schlechter 1915 as C rhodeana; Die Orchideen Schlechter 1915 as C rhodeana var obtusangula; Atlas des Orchidees Cultivees Constantin 1920 as C rossiana drawing fide; Flora of Malaya Vol 1 Holttum 1957 as C cinnamonea; The Orchids of Thailand Seidenfaden & Smitinand 1959 Drawing/photo fide; The Orchids of Thailand Seidenfaden & Smitinand 1959 as C pachybulbon; The Orchids of Thailand Seidenfaden & Smitinand 1959 as C rhodeana; The Orchids of Thailand Seidenfaden & Smitinand 1959 as C cinnamomea; The Orchids of Thailand Seidenfaden & Smitinand 1965 corrections; AOS Bulletin Vol 32 No 5 1963 as C cinnomonea; AOS Bulletin VOl 32 No 5 1963 as C rhodeana; AOS Bulletin Vol 32 No 5 1963 as C rossiana; Encyclopedia of Cultivated Orchids Hawkes 1965 as C rhodeana; Encyclopedia of Cultivated Orchids Hawkes 1965 as C cinnamomea; Dansk Botanisk Arkiv Bind 29 N.R. 4 Orchid Genera in Thailand III Seidenfaden 1975 drawing fide; Die Orchideen lieferung 15 Schlechter/Brieger 1984; Orchids of Java Comber 1990 photo fide; The Orchids of Penninsular Mayasia and Singapore Seidenfaden & Wood 1992 drawing ok; The Manual of Cultivated Orchids Bechtel, Cribb, Launert 1992 drawing fide; Identification of the Orchids [Orchidaceae Juss.] Vietnam Averyanov 1994;Orchids of Sumatra Comber 2001 photo fide; A to Z of South East Asian Orchid Species Vol 1 O'Byrne 2001 photo fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 photo ok; Orchid Flora of Kamrup District Assam Iswar Chandra Barua 2001 as C rossiana; Lindleyana Vol 17 No 1 2002; The Genus Coelogyne A Synopsis, D A Clayton 2002 photo fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo ok; Turczaninowia 19 (3): 5–58 L. V. Averyanov, Khang Sinh Nguyen etal 2016 ; Orchids of India A Glimpse Misra 2007; The Wild Orchids of Thailand 2 Vaddhanaphuti 2009 photo fide; Les Coelogynes E & J George 2011 photo fide; Wild Orchids of Myanmar Taunggyi 2014 photo fide; Atlas of Native Orchids of China Vol 1 Jin Xiaohua, Li Jianwu and Ye Deping 2019 photo fide;
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