Oncidium bohnkianum V.P.Castro & G.F.Carr 2006 SECTION Barbata Photo by Orchidario Imirim

Fragrance Part shade Warm Summer

Common Name Bohnk's Oncidium [Brazilian Nurseryman and Orchid Enthusiast current]

Flower Size 1.6" [4 cm] tall

Found in southeastern Bahia at elevations around 1000 meters as a small sized, warm to cool growing epiphyte with longitudinally elliptic-elongate, flattened, 4 furrowed on each side pseudpbulbs initially enveloped by tight, evanescent, imbricating leaf bearing sheaths and carrying apically a single, linear-lanceolate, strongly conduplicate, upper surface glossy leaves that blooms in the summer on a basal,rather slender, peduncle 2.4 to 2.8" [6 to 7 cm] long, provided with triangular, amplexicaul bracts, 4 to 6" [10 to 15 cm] long, overall, successively 1 to 2, 3 to 5 flowered inflorescence with triangular floral bracts and carrying resupinate, slightly fragrant flowers

This species is related closely to O uniflorum and O longipes but differs in the plant much larger than 20 cm tall, the lack of a triangular callus disc with the fimbriate or ciliate margins, and instead an acute narrowing between the midlobes and the lateral lobes and has a shorter column with fimbriate wings.

Newer references put this species as a synonym of O uniflorum but I have left them separate for now.

Synonyms Alatiglossum bohnkianum (V.P.Castro & G.F.Carr) F.Barros & V.T.Rodrigues 2010; Gomesa bohnkiana (V.P.Castro & G.F.Carr) M.W.Chase & N.H.Williams 2009; Kleberiella bohnkiana (V.P.Castro & G.F.Carr) V.P.Castro & Cath. 2006

References W3 Tropicos, Kew Monocot list , IPNI ; *Orchid Digest Vol 70 #2 2006 drawing/photo fide; Icones Orchidacearum Brasilienses II Plate 164 Castro Neto 2006 drawing/photo fide; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Alatiglossum uniflorum photo fide

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