Oncidium ansiferum Rchb. f. 1852 SECTION Oblongata

Flower Closeup

Inflorescence Photos by Bogarin , Used under permission of Epidendra Website CR

Part shade Hot to Cool WinterandSpring

Common Name The Handle-Bearing Oncidium [refers to the two projections on the tabula of the column]

Flower Size about 1" [about 2.5 cm]

Found in Costa Rica and Panama in lowland rainforests, cloud forests or deciduous forest at altitudes of 50 to 2500 meters and as such is a large sized, hot to cool growing epiphyte that has clustered, elliptic-oblong , laterally flattened, furrowed pseudobulbs subtended by foliaceous, imbricate bracts and one or rarely 2 elliptic-lanceolate, conduplicate basally leaves that blooms in the winter and spring on an erect to arching, to 5' [150 cm] long, multi-branched panicle arising on a newly matured pseudobulb that carries a few to many flowers.

Similar to O stenobulbon but differs by being green, not yellow green, more elliptic-oblong psueudobulbs and has longer leaves, hatchet shaped column-wings and nearly solid dark to yellow tepals and is most often found above 1350 meters. I follow Atwood and Retana in keeping the 2 species separate.

Synonyms Oncidium delumbe Lindl. 1855; Oncidium lankesteri Ames 1923; Oncidium naranjense Schltr. 1923; Oncidium tenue Lindl. 1852; Oncidium tenue var. grandiflorum Lindl. 1852;

References W3 Tropicos, Kew Monocot list , IPNI ; *Bot. Zeit. (Berlin) 10: 696. 1852; Xenia Orchidaceae Rchb.f 1854 drawing fide; Bonplandia Rchb.f 1855 as O heiroglyphicum; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium delumbe drawing good; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 drawing good; Repert. Sp. Nov. Regni. Veg. Beih. 17: 82. Panama Schlechter 1922; The Orchids of Panama L.O. Williams & P Allen 1946; Encyclopedia of Cultivated Orchids Hawkes 1965; Icones Planetarum Tropicarum plate 1465 Atwood 1992 drawing fide; Fieldiana Biology, Flora Costa Ricensis Family # 39 Orchidaceae, subtribes Maxillariinae and Oncidiinae Atwood & Mora 1997; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997; Orquideologia Vol. 23 No 2 2004; Orchid Species Culture: Oncidium, Bakers 2006; Oncidium Vol 1 Koniger 2004; The Pictoral Encyclopedia of Oncidium Zelenko 2002; AOS Bulletin Vol 77 No 12 2008 photo

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