Oncidium onustum Lindley 1833 SECTION Onustum

Photo by Dalton Holland Baptista


Photo courtesy of Jay Pfahl

Great Plant and Inflorescence

Photo courtesy of Dale and Deni Borders

to and

Common Name The Luxurious Oncidium

Flower Size 3/4" [2 cm]

Found in Panama, Colombia, Ecuador and Peru from areas that have a long dry winter and is found at elevations of 25 to 1200 meters as a miniature sized, hot to cool growing epiphyte with small, 1" pseudobulbs are conical-ovoid, longitudinaly grooved, spaced close together on the rhizome and have a gray green appearance with purple spots, and carrying a single apical, erect, very coriaceous, 4" leaf. The racemose inflorescence is basal, and fairly lax, with few to many, longlasting, non-fragrant flowers that appear in the summer and fall.

Bright light with some shade and even waterings while in growth and then after blooming they need a decided rest with no water or fertilizer until new growth appears.

Synonyms Oncidium holochrysum Rchb. f. 1862; Zelenkoa onusta (Lindl.) M.W.Chase & N.H.Williams 2001

References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; The Orchids of Panama L.O. Williams & P Allen 1946; AOS Bulletin Vol 28 No 8 1959 photo fide; AOS Bulletin Vol 32 No 4 1963 photo fide; AOS Bulletin Vol 35 No 5 1966 photo fide; AOS Bulletin Vol 37 #4 1968 photo fide; Orquideologia Vol 14 No 1 1979 photo; Icones Planetarum Tropicarum plate 186 Dodson 1980 drawing fide; Orchids from The Coast Of Ecuador Arosemana, Jurado, Estrada and Konanz 1988 photo fide; Icones Planetarum Tropicarum Series II Orchids of Peru Plate 0137 Dodson & Bennett 1989 drawing fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; Lindleyana Vol 16 No 2 2001 as Zelenkoa onustum; The Pictoral Encyclopedia of Oncidium Zelenko 2002 as Zelenkoa onusta; Native Ecuadorian Orchids Vol 4 Dodson 2003 photo fide; Orquideologia Vol. 23 No 2 2004 photo fide; Native Ecuadorian Orchids Vol 5 Dodson 2004 as Zelenkoa onusta drawing/photo fide; Orquideologia Vol. 23 No 2 2004; Oncidium Vol 1 Koniger 2004 drawing/photo fide; Orchid Species Culture: Oncidium, Bakers 2006 as Zelenkoa onusta; Orchid Species Of Peru Zelenko & Bermudez 2009 photo fide; AOS Bulletin Vol 86 #9 2017 as Zelenkoa onusta photo fide;