Collabium yunnanense Ormerod 2013

Drawing by Paul Ormerod and Taiwania 65(4): 478?492, New Orchids in the Flora of Vietnam ? (Collabieae, Malaxideae, Nervilieae and Orchideae) Leonid V. AVERYANOV, Ba Vuong TRUONG, Van Canh NGUYEN, Tatiana V. MAISAK, Quang Diep DINH, Maxim S. NURALIEV, Khang Sinh NGUYEN and Van Tan CHU 2020

LATER

Common Name The Yunnan Collabium [A province of China]

Flower Size .5" [1.25 cm]

Found in Yunnan province of China and northwestern Vietnam in primary evergreen broad-leaved montane forests, swampy and cloudy highland thickets on granite and sandstone at elevations of 1700 to 1900 meters as a small sized, cool growing terrestrial with a creeping, terete rhizome covered by thinly papery, tubular sheaths that quickly become white-grey and decay with age, giving rise to subterete, slender pseudobulbs and carrying a single, elliptic-lanceolate, subacuminate, subpetiolate base leaf that blooms in the later summer on a basal, peduncle 2.92" [7.3 cm] long, provided with 2, tubular, acute, slightly inflated sheaths, rachis 1.96" [4.9 cm] long, laxly 6 flowered inflorescence with lanceolate, acute, as long as the ovary floral bracts

"This species is readily distinguishable from the closely related Collabium chapaense (Gagnep.) Seidenf. & Ormerod and C. formosanum Hayata by a short column and the lower lip portion with two thick fleshy keels interposed apically by a short transverse keel-like callus (Ormerod, 2013). In China, C. yunnanense was reported as an epiphytic plant growing in subtropical forest on granite at an elevation of 2200 meters. This unattractive, rarely flowering plant probably has a wide distribution in highland areas of NW Vietnam, but is not yet well documented by herbarium collections." Leonid V. AVERYANOV, Ba Vuong TRUONG, Van Canh NGUYEN, Tatiana V. MAISAK, Quang Diep DINH, Maxim S. NURALIEV, Khang Sinh NGUYEN and Van Tan CHU 2020

Synonyms

References W3 Tropicos, Kew Monocot list , IPNI ; * Taiwania, 58(1): 2034, Orchidaceous Additions to the Flora of China (II) Ormerod 2013 drawing fide; Taiwania 65(4): 478?492, New Orchids in the Flora of Vietnam ? (Collabieae, Malaxideae, Nervilieae and Orchideae) Leonid V. AVERYANOV, Ba Vuong TRUONG, Van Canh NGUYEN, Tatiana V. MAISAK, Quang Diep DINH, Maxim S. NURALIEV, Khang Sinh NGUYEN and Van Tan CHU 2020 photo fide

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