Oncidium ampliatum Lindl. 1833 SECTION Oblongata

Flower Closeup Photo courtesy of Jay Pfahl

Part shade Hot Warm FalltoSpring

Common Name The Broad Pseudobulb Oncidium

Flower Size 1" [2.5 cm]

Found in the hot lowland areas of Guatemala, Belize, Honduras, El Salvador, Nicaragua, Costa Rica, Panama, Colombia, Ecuador, Peru and Venezuela and Trinidad occuring in dry deciduous to semideciduous forests at elevations of sealevel to 1000 meters as a medium sized, hot to warm growing epiphyte with large, oval, ridged, compressed, dark green mottled purple-brown pseudobulbs subtended by caducous bracts with two apical, elliptic leaves that are apically rounded or obtuse that blooms in the fall through the spring with a raceme or panicle that has a basal, erect or arching, to 4' [120 cm] long, many to few flowered inflorescence arising as the new growth matures.

Synonyms Chelyorchis ampliata (Lindl.) Dressler & N.H. Williams 2000; Oncidium ampliatum var. majus Lindl. 1894; Oncidium bernoullianum Kraenzl. 1922; Oncidium gyrobulbon Rchb.f. 1869; Rossioglossum ampliatum [Lindl.]Chase & Wms. 2008

References W3 Tropicos, Kew Monocot list , IPNI ; Symbolae Antillanae Vol VI Orchidaceae Urban 1909; Die Orchideen Schlechter 1915; Atlas des Orchidees Cultivees Constantin 1920 drawing fide; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium bernoullianum; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium gyrobulbon; Repert. Sp. Nov. Regni. Veg. Beih. 17: 81. Panama Schlechter 1922; Repert. Sp. Nov. Regni. Veg. Beih. 19: 149. Costa Rica Schlechter 1923; Repert. Sp. Nov. Regni. Veg. Beih. 19: 256. Costa Rica Schlechter 1923; The Orchids of Panama L.O. Williams & P Allen 1946 drawing fide; AOS Bulletin Vol 27 No 3 1958 drawing; AOS Bulletin Vol 27 No 6 1958; Native Orchids of Trinidad Schultes 1960; Venezuelan Orchids Vol 2 Dunsterville & Garay 1961 drawing fide; Encyclopedia of Cultivated Orchids Hawkes 1965; Flora de Venezuela Foldats Volumen XV Part 5 1970 drawing fide; Las Orquedias De El Salvador Vol 2 Hamer 1974 drawing/photo fide; Orquideologia Vol 13 No 3 1979; Orchids of Venezuela ; An Illustrated Field Guide Vol 2 Dunsterville & Garay 1979 drawing fide; Orchid Digest Vol 44 No 2 1980 photo fide; Las Orquedias de El Salvador Vol 3 Hamer 1981 drawing fide; Icones Planetarum Tropicarum plate 895 Dodson 1983 drawing fide; Native Colombian Orchids Vol 3 COS 1991 photo fide; AOS Bulletin Vol 61 No 7 1992 photo as O ampliatum var majus; Icones Planetarum Tropicarum plate 1464 Atwood 1992 drawing fide; Venezuela; Paraiso de Orquideas Romero 1997 photo fide; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 photo fide; Fieldiana Biology, Flora Costa Ricensis Family # 39 Orchidaceae, subtribes Maxillariinae and Oncidiinae Atwood & Mora 1999; Orchids of Venezuela [An illustrated field guide] Vol. 1 Ramiro and Carnevali 2000 as Chelyorchis ampliata drawing fide; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Orquideas Nativas del Tachira' Cesar Fernandez 2003 as Chelyorchis ampliata photo fide; Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003 as Chelyorchis ampliata drawing fide; Orquideologia Vol. 23 No 2 2004; AOS Bulletin Vol 74 No 10 2005 photo; Orchid Species Culture: Oncidium, Bakers 2006; Oncidium Vol 2 Koniger 2005; Vanishing Beauty, Native Costa Rican Orchids Vol 1 Pupulin 2005 as Chelyorchis ampliata phopto fide; AOS Bulletin Vol 77 No 12 2008 as Rossioglossum ampliatum; Orchid Species of Peru Zelenko Bermudez 2009 photo fide; Orchids of Costa Rica Vol 1 Morales 2009 as Chelyorchis ampliataphoto fide;