Pleurothallis chamensis Lindl. 1846 SUBGENUS Acianthera

Photo by Weyman Bussey, plant grown by Jim Hamilton of Petite Plaisance Orchids


Drawing by Dunsterville


Common Name The Rio Chama Pleurothallis [A river in the state of Merida in Venezuela]

Flower Size

Found in Venezuela and Colombia at elevations around 1500 meters as a small sized, cool growing, shortly repent epiphyte or terrestrial with erect to erect-patent, rigid, trangular to triquetrous in the lower portion becoming dilated to narrowly trilate or biate apically ramicauls carrying a single, apical, erect, thick, coriaceous, erect to erect-patent, carinate at least with the prinical nerve, elliptic, oblong-elliptic to ovate to elliptic-ovate, rounded obtuse to acute apically, rounded below into the shortly cordate to rarely widely cuneate base leaf that blooms in the late summer and earlier fall on a single to various, arising through a membraneous to coriaceous, conduplicate, acuminate spathe, flowered to almost the base, shorter to almost as long as the leaf, few to several flowered inflorescence carrying fleshy flowers

Synonyms Acianthera chamensis (Lindl.) Pridgeon & M.W.Chase 2001; Humboldtia chamensis (Lindl.) Kuntze 1891; Humboltia chamensis (Lindl.) Kuntze 1891;

References W3 Tropicos, Kew Monocot list , IPNI ;

* Orchid. Linden.: 2 Lindley 1846

Bonplandia Rchb.f 1855 as P chamensis;

Xenia Orchidaceae Vol 3 Reichenbach 1878 as P chamensis;

Venezuelan Orchids Illustrated Vol 1 Dunsterville & Garay 1959 as P chamensis drawing good;

AOS Bulletin Vol 36 #9 1967 as P chamensis;

AOS Bulletin Vol 38 #6 1969 as P chamensis;

Flora de Venezuela Foldats Volumen XV Part 2 1970 as P chamensis drawing good;

Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 as P chamensis drawing good;

Icones Pleurothallidinarum Vol III Systematics of Pleurothallis Luer 1986;

Native Colombian Orchids Vol 3 COS 1991 as P chamensis photo fide;

Orchids of Venezuela [An illustrated field guide] Vol. 3 Ramiro and Carnevali 2000 as P chamensis drawing good;

Lindleyana Vol 16 No 4:242 Pridgeon & M.W.Chase 2001 as Acianthera chamensis;

Orquideas Nativas del Tachira Cesar Fernandez 2003 as P chamensis photo ok;

Pleurothallids Neotropical Jewels Vol 1 Karremans & Viera 2020 as Acianthera chamensis photo fide