Oncidium auricula (Vell.) Pabst 1957SECTION Paucituberculata Photo courtesy of © Lourens Grobler

Plant in situ La Caraça - Pico Da Carapuça, Minas Gerais elevation 1100 to 1300 meters

Photo courtesy of Jay Pfahl

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Common Name The Auricled Oncidium

Flower Size about 1/8" [5 to 6 mm]

This miniature to small sized, cool to warm growing, lithophytic or epiphytic, cold to cool growing species is found in Rio de Janiero, Espiritu Santo, Sao Paulo and Minas Gerais, Brazil on moss covered tree trunks in primary forests near streams in areas with hot dry days and cool nights with frequent dews at elevations around 1000 meters with elliptic to somewhat round, light green, laterally compressed, ancipitous, pseudobulb partially enveloped basally by a few dry, leafless sheaths and carrying a single, apical, elliptic, acute, stiff, leathery, very fleshy, keeled below, shortly conduplicate below into the base leaf that blooms in the fall on a basal, erect to arching, 5 to 12" [12.5 to 30 cm] long, to 40 flowered inflorescence with basal branches and partially open flowers. This plant has a decided "mule ear" look but differs in having conspicuous pseudobulbs.

Synonyms Aurinocidium harrisonianum ( Lindl. ) Romowicz & Szlach. 2006; *Epidendrum auricula Vell. 1831; Grandiphyllum auricula ( Vell. ) Docha Neto 2006; Oncidium acrobotryum Klotzsch 1855; Oncidium harrisonianum Lindl. 1833 ; Oncidium pallidum Lindl. 1840; Oncidium pantherinum Hoffmanns. ex Lindl. 1855; Oncidium pentaspilum Hoffmanns. ex Lindl. 1855; Oncidium ramiferum hort. ex Klotzsch 1855

References W3 Tropicos, Kew Monocot list IPNI ; Die Orchideen Schlechter 1915 as O harrisonianum; Atlas des Orchidees Cultivees Constantin 1920 as O harrisonianum drawing ok; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as O harrisonianum; Orchids of the High Mountain Atlantic Rainforest in SE Brazil Warren & Miller 1994 as O harrisonianum; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 as O harrisonianum photo fide; The Pictoral Encyclopedia of Oncidium Zelenko 2002 as O harrisonianum drawing good; Oncidium Vol 2 Koniger 2005 as O harrisonianum photo fide; Orchid Species Culture: Oncidium, Bakers 2006 as O harrisonianum; Mille et Une Mini Orchideees Roguenant 2009 photo fide;

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