Oncidium calanthum Rchb.f. 1870 SECTION Heterantha
Photo courtesy of © Lourens Grobler
Drawing by © Rchb.f Herbarium
EARLY 
Common Name The Beautiful Blooming Oncidium
Flower Size 1" [2.5 cm]
Found in Ecuador and Peru as a miniature sized, warm to cool growing epiphyte with egg-shaped, well spaced pseudobulbs carrying 2, oblong-lanceolate to elliptic-lanceolate, acute to shallowly notched, narrowing below into the conduplicate base leaves that blooms in the late spring to early summer on an axillary, climbing, twining, wirey, racemose to paniculate inflorescence with short fractiflex branches with several flowers of which some will be star shaped and infertile. This orchid can grow keikis on it's inflorescence so do not remove it until it is brown.
Synonyms Heteranthocidium calanthum (Rchb.f.) Szlach., Mytnik & Romowicz 2006
References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Orchidaceae, Orchids of Peru Vol5 Schweinfurth 1961; Oncidium Vol 1 Koniger 2004 photo/drawing fide; Orchid Species Culture Oncidium/Odontoglossum Alliance Bakers 2005; Orchid Species of Peru Zelenko Bermudez 2009 photo fide
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