Oncidium geertianum C. Morren 1848 SECTION Sphacelatum Photo courtesy of Weyman Bussey

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Common Name Geert's Oncidium [Belgian Orchid Enthusiast 1800's

Flower Size 1.2" [3 cm]

A small sized, cool to cold growing epiphytic species found in Mexico at elevations of 1600 to 2300 meters with a short rhizome giving rise to ovate, slightly laterally compressed, ancipitous pseudobulbs carrying 2, apical, lanceolate, acute leaves that blooms in the late summer and fall on an ascending to erect, spreading, decurved, 6 to 8 flowered, racemose inflorescence.

Often cited as a synonym of Oncidium nebulosum but I have kept them apart awaiting better photos and info.

Synonyms Oncidium caesium Rchb. f. 1854

References W3 Tropicos, Kew Monocot list , IPNI ; Xenia Orchidaceae Rchb.f 1854 as O caesium drawing fide; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as O caesium; Orquideas del Estado de Morelos ORQUÍDEA (MÉX.) VOLUMEN 16 NÚMERO ÚNICO enero 2002 drawing/photo fide; Oncidium Vol 3 Koniger photo/drawing fide; Algunas Orquideas de Mexico Tomo 1 Suarez 2013 photo fide