Oncidium citrinum Lindl. 1835 SECTION Oblongata

Photo by Byron Rinke

Common Name The Yellow Oncidium

Flower Size .8" [2 cm]

Found in Trinidad & Tobago, Venezuela and Colombia in rainforests at elevations of 400 to 2050 meters as a mini-miniature to small sized warm to cool growing epiphyte with a short rhizome giving rise to thin, laterally strongly compressed, ancipitous, often ribbed pseudobulbs enveloped basally by several pairs, imbricating, leaf bearing in youth sheaths and carrying 1 to 2 apical, clear light green above, dull below, linear-oblong, rounded apically, becoming conduplicate towards the base leaves that blooms in the summer on an erect, paniculate, 28 to 39" [70 to 1000 cm] long, many flowered inflorescence arising from the leaf axil of a mature pseudobulb and has triangular, close fitting bracts spaced 2" [5 cm] apart towards the lower part and carries about 10 flowers per branch

Synonyms Oncidium citrinum var. verum Regel 1856

References W3 Tropicos, Kew Monocot list , IPNI ; Symbolae Antillanae Vol VI Orchidaceae Urban 1909; Die Orchideen Schlechter 1915; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Native Orchids of Trinidad Schultes 1960; Encyclopedia of Cultivated Orchids Hawkes 1965; Venezuelan Orchids Illustrated Vol 4 Dunsterville & Garay 1966 drawing fide; Flora de Venezuela Volumen 15 Parte 5 Foldats 1970 drawing fide; Orchids of Venezuela, An Illustrated Field Guide Vol 2 Dunsterville & Garay 1979 drawing fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 drawing fide; Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003; Orquideologia Vol 23 #2 2004; Orchid Species Culture Odontoglossum/Oncidium Alliance Bakers 2006; AOS Bulletin Vol 78 No 5 2009 photo fide; AOS Bulletin Vol 87 #1 2018 drawing fide;