Oncidium regentii V.P.Castro & G.F.Carr 2005 SECTION Barbata

Photo by © Dalton Holland Baptista

TYPE Drawing

TYPE Drawing by © V P Castro

Part shade Hot toWarm Spring

Common Name Regent's Oncidium [Brazilian Original Collector of species current]

Flower Size .8" [2 cm]

Found in Bahia and Espirito Santo states of Brazil in montane rainforests at elevations of 300 to 400 meters as a miniature sized, hot to warm growing epiphyte with elliptic-ellongate, laterally compressed, laterally grooved pseudobulbs enveloped basally by leafless sheaths and carrying a single, apical, linear-lanceolate, conduplicate, acute, gradually narrows below into the conduplicate base leaf that blooms in the spring on a basal, slender, racemose, 4.8 to 5.2" [12 to 13 cm] long, successively 3 to 5 flowered inflorescence.

This species is related closely to O uniflorum and O longipes but differs in the plant larger than 8" [20 cm] tall, the inflorescence that is just short of the length of the leaves, the large flower that is 3.5 cm from dorsal sepal to lateral sepal, the lip that is half the size of the lateral sepals, the lip midlobe is small in comparison to the tepals, very small lateral lobes of the lip, a triangular isthmus with a reflexed and slightly denticulate margin, auricles that are very denticulate around the stigma, a column that is .2" [5 mm] or less, a small stigma and a tabula infrastigmatica that is longer than wide.

Synonyms Alatiglossum regentii (V.P.Castro & G.F.Carr) Baptista 2007; Alatiglossum regentii (V.P.Castro & G.F.Carr) F.Barros & V.T.Rodrigues 2010; Gomesa carlosregentii Lückel 2010; Kleberiella regentii (V.P.Castro & G.F.Carr) V.P.Castro & Cath. 2006;

References W3 Tropicos, Kew Monocot list , IPNI ; *AOS Bulletin Vol 74 No 6 2005 photo fide; Icones Orchidacearum Brasilense II Plate 178 Castro Neto 2006 drawing ok/ photo good; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Alatiglossum uniflorum photo fide