Oncidium cebolleta (Jacq.) Sw. 1800 SECTION Cebolletae
Photo by © W. Cetzal-Ix and Harvard Papers in Botany Vol 21 #2 Cetzal-Ix Carnevalli and Romero-Gonzalez 2016 Synopsis of the Trichocentrum Clade
Photo by © Jay Pfahl
to 
Common Name The Onion Leaf Oncidium
Flower Size to 1 1/2" [to 4 cm]
Fouind in Colombia and Venezuela in seasonally dry forests at elevations of 150 to 1700 meters in elevation in xerophytic conditions as a medium sized, hot to cool growing, caespitose, epiphytic species with terete, sulcate, erect or suberect, fleshy leaves and very small, tubular pseudobulbs that are subtended by large white sheathing that it blooms in the winter on a basal, arcuate, 2 1/2' [75 cm] long, simple or short branched, multi-flowered racemose inflorescence arising on a newly matured pseudobulb.
This pendulous to lateral growing orchid needs to be mounted on tree fern or wood and likes high light and humidity and water while growing and less to none when mature. This plant was used by the precolumbian indians in central America as a type of hallucinogen, as to how I am not sure.
Synonyms Cohniella cebolleta (Jacq.) Christenson 1999; Dendrobium cebolleta Jacq. 1760 [erroneous]; *Epidendrum cebolleta Jacq. 1760; Oncidium humboldtii Schltr. 1926; Oncidium ottonis Rchb.f. ex Kraenzl 1922; Stilifolium cebolleta (Jacq.) Koniger & Pongr. 1997; Trichocentrum cebolleta (Jacq.) M.W.Chase & N.H.Williams 2001; Trichocentrum sprucei (Lindl.) M.W.Chase & N.H.Williams 2001;
References W3 Tropicos, Kew Monocot list , IPNI ; Lankester's Epidendra Website CR ; Symbolae Antillanae Vol VI Orchidaceae Urban 1909; Die Orchideen Schlechter 1915; Atlas des Orchidees Cultivees Constantin 1920 drawing fide; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 as O longifolium; Flore Descriptive des Antilles Francaises H. Stehle 1939 drawing ok; Native Orchids of Trinidad Schultes 1960; AOS Bulletin Vol 30 No 9 1961; Venezuelan Orchids Illustrated Vol 2 Dunsterville & Garay 1961 drawing fide; Encyclopedia of Cultivated Orchids Hawkes 1965 as O longifolium; AOS Bulletin Vol 36 #9 1967; AOS Bulletin Vol 38 No 6 1969; Flora de Venezuela Volumen XV Part 5 Foldats 1970 drawing fide; Flora of the Lesser Antilles Garay & Sweet 1974 drawing fide; Las Orquedias De El Salvador Vol 2 Hamer 1974 drawing/photo fide; AOS Bulletin Vol 48 #5 1979; Orchidaceae Brasilenses Band 2 Pabst & Dungs 1977 drawing fide; Orquídea (Mexico City), n.s., 7[3]: 1979; Orchids of Venezuela, An Illustrated Field Guide Vol 2 Dunsterville & Garay 1979 drawing fide; Las Orquedias de El Salvador Vol 3 Hamer 1981 drawing ok; Icones Planetarum Tropicarum plate 899 Dodson 1983 drawing fide; Flora Novo-Galaciana Vol 16 McVaugh 1985 as Oncidium cebolleta; The Orchids of Surinam Werkhoven 1986 photo fide; An Introdution to the Orchids of Mexico Wiard 1987 photo fide; Orchids Travel By Air A Pictoral Safari Mulder, Mulder-Roelfsema and Schuiteman 1990 photo fide; Native Colombian Orchids Vol 3 COS 1991 photo fide; Icones Planetarum Tropicarum plate 1467 Atwood 1992 drawing fide; The Manual Of Cultivated Orchid Species Bechtel, Cribb & Launert 1992 photo fide; Orchid Digest Vol 60 No 1 1996 photo fide; Fieldiana Biology, Flora Costa Ricensis Family # 39 Orchidaceae, subtribes Maxillariinae and Oncidiinae Atwood & Mora 1999 drawing fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; Orchids of Venezuela [An illustrated field guide] Vol. 1 Ramiro and Carnevali 2000 as Cohniella cebolleta drawing fide; Lindleyana Vol 16 No 2 2001 as Trichocentrum cebolleta; Lindleyana Vol 16 No 3 2001 as Trichocentrum sprucei; Rudolf Schlechter Die Orchideen Band 1C lieferung 44-45 pg 2763 - 2898 Brieger 2001 as Cohniella cebolleta; Harvard Pap. Bot. 5 #2: Carnevali etal 2001 as Coheniella cebolleta; Orquideas del Estado de Morelos ORQUÍDEA (MÉX.) VOLUMEN 16 NÚMERO ÚNICO enero 2002 drawing/photo fide; Orquideas Nativas del Tachira Cesar Fernandez 2003 as Cohniella cebolleta photo fide; Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003 as Trichocentrum cebolleta; Manual de Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003 drawing fide; Orquideologia Vol. 23 No 2 2004; Orchids of The Brazilian Central Plateau Menezes 2004 photo fide; 100 Orquideas Argentinas Freuler 2005 photo fide; Orchid Species Culture: Oncidium, Bakers 2006 as Cohniella cebolleta ; The Pictoral Encyclopedia of Oncidium Zelenko 2002 as Trichocentrum cebolleta; Vanishing Beauty, Native Costa Rican Orchids Vol 1 Pupulin 2005 as Cohniella cebolleta photo fide; Orquideas Da Chapada Diamantina Brito & Cribb 2005; AOS Bulletin Vol 76 No 3 2007 as Cohniella cebolleta photo fide; Orchids of Costa Rica Vol 1 Morales 2009 as Cohniella cebolleta photo fide; J. Torrey Bot. Soc. 137: 198 Cetzal & Carnevali 2010 as Cohniella cebolleta drawing fide; Orquideas de Roirama Luz & Franco 2012 as Cohniella cebolleta photo fide; AOS Bulletin Vol 84 #2 2015 photo fide; Harvard Papers in Botany Vol 21 #2 Cetzal-Ix Carnevalli and Romero-Gonzalez 2016 Synopsis of the Trichocentrum Clade as Cohniella cebolleta photo fide; AOS Bulletin Vol 86 # 11 2017 as Trichocentrum cebolleta photo fide; Orchid Genera and Species in Guatemala Archila, Szlachchetko, Chiron, Lipinska, Mystkowska and Bertolini 2018 as Cohniella cebolleta photo not = O hellicanthum
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