!Rossioglossum grande (Lindl.) Garay & G.C. Kenn. 1976
Photo by Jay Pfahl
Photo by © Pieter C. Brouwer and his Nature Photo Website
Photos by Weyman Bussey, plant grown by Judy Carney
Photo by Patricia Harding
to 
LATE
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Common Name The Large Rossioglossum - The Clown Orchid - In Guatemala - Boca de Tigre [Tiger's Mouth]
Flower Size to more than 6" [to more than 15 cm]
Found from Guatemala, Belize and Mexico as a medium to large sized, epiphytic, warm to cold growing orchid that occurs at elevations of 1400 to 2700 meters in moist deciduous, rainforests with a distinct wet, shady [from leaves] spring and summer and much drier and brighter [fallen leaves] fall and winter,with clustered, ovoid or orbicular, laterally compressed, ancipitous, glaucous, pseudobulbs carrying 1 to 3 apical, elliptic or lanceolate, coriaceous, glaucous, acute, petiolate leaves and blooms on an axillary, lateral to erect, to 12" [30 cm] long, racemose, several [2 to 8] flowered inflorescence with lanceolate, apressed, scarious bracts and waxy longlasting flowers all occuring in the late fall and winter.
The easiest way to identify this species when the lip can be viewed well is the the yellow, flabellate, pubescent, suborbicular column wings instead of the thin, elongate, recurved, reddish column wings instead of the rare R williamsianum. Of course there are many other differences including a fewer flowered, shorter inflorescence but the column wings are diagnostic.
Synonyms *Odontoglossum grande Lindl.1840; Rossioglossum grande (Lindl.) Garay & G.C. Kenn. 1976; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 photo fide; Rossioglossum grande var. aureum (Stein) Garay & G.C.Kenn. 1976
References W3 Tropicos, Kew Monocot list , IPNI ; The Orchids of Mexico and Guatemala Bateman 1843 drawing fide; Die Orchideen Schlechter 1915 as Odontoglossum grande photo fide; Atlas des Orchidees Cultivees Constantin 1920 as Odontoglossum grande drawing fide; AOS Bulletin Vol 26 No 10 1957 as Odontoglossum grande photo fide; Orchid Digest Vol 23 #1 1959 as Odontoglossum grande photo fide; AOS Bulletin Vol 30 No 9 1961 as Odontoglossum grande; AOS Bulletin Vol 32 No 10 1963 as Odontoglossum rossii; AOS Bulletin Vol 33 No 11 1964 as Odontoglossum grande; Encyclopedia of Cultivated Orchids Hawkes 1965 as Odontoglossum grande; AOS Bulletin Vol 36 #4 1967 as Odontoglossum rossii; Orchid Digest Vol 34 #3 1970 as Odontoglossum grande photo fide; Die Orchideen #1 1-4 tafel 1&2 Rudolph Schlechter 1971 as Odontoglossum grande drawing ok; AOS Bulletin Vol 44 #8 1975 as Odontoglossum rossii photo fide; ORQUIDEA (Méx . ) 8(2) MARZO 1982 drawing/photo fide; AOS Bulletin Vol 52 No 9 1983 as Odontoglossum grande photo fide; The Manual Of Cultivated Orchid Species Bechtel, Cribb & Launert 1992 photo fide; AOS Bulletin Vol 62 No 12 1993 photo fide; AOS Bulletin Vol 64 No 4 1995 drawing fide; AOS Bulletin Vol 64 No 12 1995 photo fide; AOS Bulletin Vol 65 No 4 1996 drawing fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997 drawing/photo fide; Guatemala Y Sus Orquideas Behar & Tinschert 1998 photo fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 39 pg 2437 - 2500 Brieger 2000 as Odontoglossun grande drawing fide; AOS Bulletin Vol 71 No 8 2002 drawing fide; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Icones Orchidacearum 5 - 6 Orchids of Mexico Part 2 - 3 Plate 660 Hagsater & Soto 2002 drawing fide; AOS Bulletin Vol 73 No 6 2004 photo fide; AOS Bulletin Vol 73 No 6 2004 as R grande frma aurea photo fide; Australian Orchid Review Vol 70 No 1 2005; AOS Bulletin Vol 74 No 2 2005 photo fide; AOS Bulletin Vol 74 No 10 2005 photo fide; AOS Bulletin Vol 75 No 5 2006 photo fide; AOS Bulletin Vol 75 No 9 2006 photo fide; Orchid Species Culture: Oncidium, Bakers 2006; AOS Bulletin Vol 77 No 12 2008 photo; AOS Bulletin Vol 78 No 5 2009 photo fide; Orchid Digest Vol 76 #3 2012 photo fide; Orchideen Series C Band 74 Thiv & Worz 2012 photo fide; Algunas Orquideas De Mexico Tomo 1 Suarez 2012 photo fide; AOS Bulletin Vol 82 #9 2013 photo fide; AOS Bulletin Vol 82 #11 2013 photo fide; AOS Bulletin Vol 85 #2 2016 photo fide; AOS Bulletin Vol 85 #3 2016 as Odontoglossum grande drawing fide; Orchid Genera and Species in Guatemala Archila, Szlachchetko, Chiron, Lipinska, Mystkowska and Bertolini 2018; AOS Bulletin Vol 88 # 1 2019 photo fide; AOS Bulletin Vol 88 #5 2019 drawing fide;
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