Oncidium heteranthum Poepp. & Endl. 1836 SECTION Heterantha

Plant

Flower Closeup Photos courtesy of Americo Docha Neto

to

Common Name The Differently Flowered Oncidium [refers to the normal and sterile flowers of this species]

Flower Size 3/4" [1.8 cm]

Found from Venezuela, Surinam, northern Brazil, Colombia, Ecuador, Peru and Bolivia at elevations of 200 to 2900 meters as a miniature to medium sized, warm to cold growing epiphyte with closely spaced, somewhat grooved, narrowly ovate, laterally compressed, ancipitous pseudobulbs partially enveloped by a few, basal, short, leaf-bearing sheaths and carrying 1 to 3 apical, lanceolate, acute, shortly conduplicate below into the base leaves that blooms mostly in the summer on a basal, 30 to 47" [75 to 120 cm] long, paniculate, slender, erect to arching to drooping, many flowered inflorescence arising on a mature pseudobulb and carrying both lipless, sterile and normal lipped flowers.

Synonyms Heteranthocidium heteranthum (Poepp. & Endl.) Szlach., Mytnik & Romowicz 2006; Oncidium ionops Cogn. & Rolfe 1893; Oncidium zonatum Cogn 1893

References W3 Tropicos, Kew Monocot list , IPNI ; Bonplandia Rchb.f 1856; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; The Orchids of Panama L.O. Williams & P Allen 1946; AOS Bulletin Vol 30 No 5 1961; Venezuelan Orchids illustrated Vol 2 Dunsterville & Garay 1961 drawing fide; Flora de Venezuela Foldats Volumen XV Part 5 1970 drawing good; Orchids of Venezuela An Illustrated Field Guide Vol 2 Dunsterville & Garay 1979 drawing fide; Icones Planetarum Tropicarum plate 566 Dodson 1982 drawing fide; The Orchids of Surinam Werkhoven 1986 photo ok; Icones Planetarum Tropicarum Series II Orchids of Peru Plate 0128 Dodson & Bennett 1989 drawing fide; Native Colombian Orchids Vol 3 COS 1991 photo not = O adelaidae; Native Colombian Orchids Vol 6 COS 1998 errata = O adelaidae; Icones Orchidacearum Peruviarum Plate 142 Bennett & Christenson 1993 Drawing fide; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 photo good; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 drawing fide; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Native Ecuadorian Orchids Vol 4 Dodson 2003 drawing fide; Orquideologia Vol. 23 No 2 2004; Boletim CAOB Vol 55 2004; Oncidium Vol 2 Koniger 2005 drawing /photo hmm; Orchid Species Culture: Oncidium, Bakers 2006; Mille et Une Mini Orchideees Roguenant 2009 photo good;

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