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Oncidium excavatum Hollow Oncidium


Hollow Oncidium , Oncidium excavatum


Oncidium excavatum Lindley 1838 SECTION Excavata Photo by Jay Pfahl

Common Name The Hollow Oncidium [refers to the deep pit at the base of the underside of the lip]

Flower Size 1 1/2" [3.75 cm]

This is a large sized, cool to cold growing, terrestrial species on steep embankments from Ecuador and Peru in moist montane forests at elevations of 2400 to 2800 meters with numerous, clustered, ovoid or oblong-ovoid, slightly compressed pseudobulbs enveloped basally by a few leaf-bearing sheaths and carrying 1 or 2 apical, linear to narrowly oblong, long attenuate towards the apex, subpetiolate below leaves that blooms in spring and early summer with a stout, axillary, 2 to 4' 8" [60 to 150 cm] long, erect or arcuate, laxly many flowered panicle with 8 to 12, ascending, 10 to 20 flowered branches that arises on a newly forming pseudobulb and carrying successively opening flowers.

Synonyms Oncidium aurosum Rchb.f 1854; Oncidium boissieri Kraenzl. 1922; Oncidium excavatum var. dawsonii B.S. Williams 1885; Oncidium rupestre Lindl. 1844; Oncidium skinneri Lindl. 1855; Vitekorchis excavata (Lindl.) Romowicz & Szlach. 2006