Oncidium cultratum Lindl. 1838 SECTION Heterantha
Photo by Esteban Dominguez Vargas
Photo by Patricia Harding
to 
Common Name The Knife-Shaped Oncidium
Flower Size 1 1/5" [3 cm]
Found in Colombia, Ecuador and Peru in wet montane forests at elevations of 1700 to 3700 meters as a small to medium sized, cool to cold growing epiphyte or terrestrial orchid on steep embankments with a short rhizome carrying ovoid, slightly compressed pseudobulbs enveloped basally by several, distichous, imbricating sheaths with the upper few being foliaceous and carrying 1 to 2 apical, erect, coriaceous, linear-elliptical, leaves that are basally conduplicate and blooms on an erect, axillary, 12 to 16" [30 to 40 cm] long, paniculate, several flowered inflorescence arising on a mature pseudobulb occuring at most any time of the year.
Synonyms Heteranthocidium cultratum (Lindl.) Szlach. 2006; Oncidium cuencanum Rchb. f. 1877; Oncidium formosissimum Rchb.f. 1852; Oncidium jamiesonii Lindl. 1850-1; Oncidium jamesonii Rchb.f. 1877
References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium cuencanum; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium formossisimum drawing good; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium jamiesonii drawing ok; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Beitrage Zur Orchideenkunde Von Colombia 27:112 Schlechter 1924 as O formosissimum; Icones Planetarum Tropicarum plate 472 Dodson 1982 drawing fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; The Pictoral Encyclopedia of Oncidium Zelenko 2002 Native Ecuadorian Orchids Vol 4 Dodson 2003 photo fide; Orquideologia Vol. 23 No 2 2004 as Oncidium cuencanum; Orquideologia Vol. 23 No 2 2004; Orquideologia Vol. 23 No 2 2004 as Oncidium formosisimum; Orquideologia Vol. 23 No 2 2004 as Oncidium jamiesonii; Orquideologia Vol 24 #1 2005 photo fide; Oncidium Vol 2 Koniger 2005 drawing/photo fide; Orquideologia Vol 25 #1 2007 photo fide; Orchid Species Culture: Oncidium, Bakers 2006; Orchid Species of Peru Zelenko Bermudez 2009 photo fide; Orquideologia Vol 28 #2 2011 photo fide; Orquideas de Farallones de Cali Galindo-Tarazona, Haelterman, Zuluaga Trochez and Sebastian Moreno 2020 photo fide
--------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------
