Oncidium ottonis Schltr. 1914 SECTION Concoloria Photo by Eric Hunt and his Flicker Orchid Photostream

Side View of Flower Photo courtesy of Patricia Harding

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Common Name Otto's Oncidium [Otto Beyrodt Director of Berlin Botanic Garden late 1800's]

Flower Size 1 3/4" [4.5 cm]

Found in Parana, Santa Catarina and Rio Grande Do Sul states of Brazil at elevations of 600 to 1200 meters as a medium sized, warm to cool growing epiphyte with ovate, laterally compressed, ancipitous pseudobulbs partially enveloped basally by 2 pairs of dry thin leafless sheaths and carrying 2, apical, lanceolate, acute, conduplicate below into the elongate, narrowing petiole-like base leaves that blooms on an axillary, racemose, few [4 to 5] flowered in the apical 1/2, 4 1/2" [11 cm] long inflorescence that arises on a newly matured pseudobulb with spicely fragrant, large flowers.

This species is often cited as a synonym of Oncidium concolor but differs in having the lamellae of the callus equal in height from start to finish and other floral differences in the lip but most importantly O ottonis will always have brown spots on the dorsal side of the sepals while O concolor has a uniform yellow green on both sides of the sepals.

Synonyms Concocidium ottonis (Schltr.) Romowicz & Szlach.2006; Oncidium concolor var. ottonis (Schltr.) Pabst 1957

References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 drawing not; AOS Bulletin Vol 30 No 9 1961; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997; Oncidium Vol 2 Koniger 2005; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Brasilidium ottonis photo fide

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