Oncidium ansiferum Rchb. f. 1852 SECTION Oblongata
Photos by © Bogarin , Used under permission of the The Epidendra Website
Drawing by © Willibald Koniger
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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 Alejuela and San Jose provinces of Costa Rica and Chiriqui province of 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; The Manual Of Cultivated Orchid Species Bechtel, Cribb & Launert 1992 photo fide; Fieldiana Biology, Flora Costa Ricensis Family # 39 Orchidaceae, subtribes Maxillariinae and Oncidiinae Atwood & Mora 1999 drawing good; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003; Orquideologia Vol. 23 No 2 2004; Oncidium Vol 1 Koniger 2004 drawing/photo fide; Orchid Species Culture: Oncidium, Bakers 2006; The Pictoral Encyclopedia of Oncidium Zelenko 2002; AOS Bulletin Vol 77 No 12 2008 photo fide; Orchid Genera and Species in Guatemala Archila, Szlachchetko, Chiron, Lipinska, Mystkowska and Bertolini 2018; Vanishing Beauty, Native Costa Rican Orchids Vol 2 Lacaena to Pteroglossa Pupulin 2020 photo fide
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