Oncidium ascendens Lindley 1842 SECTION Cebolletae


Flower closeup

Photos by Jay Pfahl

Part shade Hot to CoolSpringandSummer

Common Name The Climbing Oncidium

Flower Size 3/4"

This large sized, hot to cool, pendulous growing, terete-leafed epiphyte was collected in Belize but they can be found as epiphytes with an ascending simple or branched raceme with small, successively opening flowers on trees in swamps, open mountain forests, pastures and coffee plantations at elevations of 300 to 1500 meters in all of Central America, Colombia and the West Indies. Please note that while the plant is pendant growing the inflorescence is basically erect to lateral so mount on treefern or wood accordingly, give bright light, high humidity and year round water with less when mature. This orchid has small inconspicuous pseudobulbs carrying a single, apical, terete, thick-fleshy, long leaf and blooms in the spring on an erect to lateral, racemose, to 6" [15 cm] long, several to many flowered, racemose inflorescence arising on a mature pseudobulb.

Synonyms Cohnia quekettioides Rchb.f. 1852; Cohniella ascendens (Lindl.) Christenson 1999; Cohniella bolivianensis ( Oppenheim ) Senghas 2001; Cohniella quekettioides (Rchb.f.) Pfitzer 1889; Oncidium bolivianense Oppenheim 1916; Oncidium helicanthum Kraenzl. 1922; Oncidium subulifolium Schltr. 1922; Stilifolium ascendens (Lindl.) Koniger & Pongr. 1997; Trichocentrum ascendens (Lindl.) M.W.Chase & N.H.Williams 2001

References W3 Tropicos, Kew Monocot list , IPNI ; Lankester's Epidendra Website CR ; Xenia Orchidaceae Rchb.f 1858 as Cohnia quekettioides drawing fide; Die Orchideen Schlechter 1915 as Cohniella quekettioides; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 drawing ok; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 as O helicanthum drawing fide; *Repert. Sp. Nov. Regni. Veg. Beih. 19: 150 Costa Rica Schlechter 1923; Symbolae Antillanae Vol VI Orchidaceae Urban 1909; AOS Bulletin Vol 30 No 9 1961; Encyclopedia of Cultivated Orchids Hawkes 1965 as Cohniella quekettioides; Las Orquedias De El Salvador Vol 2 Hamer 1974 drawing/photo fide; Las Orquedias de El Salvador Vol 3 Hamer 1981 drawing ok; Icones Planetarum Tropicarum plate 564 Dodson 1982 as Onc bolivianese drawing fide; Icones Planetarum Tropicarum plate 896 Dodson 1983 drawing fide; An Introdution to the Orchids of Mexico Wiard 1987 photo fide; Fieldiana Biology, Flora Costa Ricensis Family # 39 Orchidaceae, subtribes Maxillariinae and Oncidiinae Atwood & Mora 1997; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 as O boliviense; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997; Lindleyana Vol 16 No 2 2001 as Trichocentrum ascendens; Orchid Species Culture: Oncidium, Bakers 2006 as Cohniella ascendens; The Pictoral Encyclopedia of Oncidium Zelenko 2002 as Trichocentrum ascendens; Orquideologia Vol. 23 No 2 2004; Vanishing Beauty, Native Costa Rican Orchids Vol 1 Pupulin 2005 as Cohniella ascendens photo fide; AOS Bulletin Vol 76 No 3 2007 photo as Cohniella ascendens; Guia de Orquideas de Chiapas Carlos Rommel Beutelspacher Baigts 2013 as Trichocentrum ascendens photo fide