Oncidium gravesianum Rolfe 1892 SECTION Crispa Photo by © Lourens Grobler
Flower Closeup Photo by © Sidney Marçal
EARLY
Common Name Graves Oncidium [English Horticultural Society Member later 1800's]
Flower Size 2" [5 cm]
Endemic to Pernambuco, Bahia and Minas Gerais State in northeastern Brazil at elevations around 500 to 1000 meters as a small sized, cool to warm growing epiphyte and is often confused with Onc endersianum but differs in producing many more flowers that occur in the early fall and by being found in Pernambuco instead of Sao Paulo and Rio. This orchid has purplish suffused with brown, compressed pseudobulbs carrying 2 apical leaves and blooms in the early fall in situ on a basal, 12 to 18" [30 to 45 cm] long, 8 to 16 flowered inflorescence .
The O crispum complex includes O praetextum, O curtum, O enderianum and O gravesianum, and all are now referenced as synonyms of Oncidium crispum. I have left them separate as they have been known as such for centuries.
Synonyms Anettea gravesiana (Rolfe) Szlach. & Mytnik 2006; Brasilidium gravesianum (Rolfe) Campacci 2006; Gomesa gravesiana (Rolfe) M.W.Chase & N.H.Williams 2009
References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Orchidaceae Brasilenses Band 2 Pabst & Dungs 1977 draing Orchid Digest Vol 44 No 4 1980 photo fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997 photo fide; Orchid Species Culture: Oncidium, Bakers 2006; Oncidium Vol 2 Koniger 2005 photo/drawing; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Orquideas Da Chapada Diamantina Brito & Cribb 2005; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Brasilidium crispum photo fide
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