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Oncidium diadema is an orchid species identified by Linden in 1866. Culture information and photos for this orchid are commonly detailed under the currently accepted name of Cyrtochilum serratum.
ORIGIN: Found in western Ecuador and Peru in montane cloud forests at elevations of 1300 to 3300 meters.
DESCRIPTION: Large sized, cold to cool growing epiphyte or terrestrial on steep cliff faces with oblong-ovoid, compressed pseudobulbs carrying 2, apical, narrowly linear-oblanceolate, acute leaves that blooms in the winter on an axillary, arcuate, 5 to 9' [150 to 270 cm] long, flexuous, racemose to paniculate, branches relatively short, fractiflex, 3 to 6 flowered each branch, many flowered inflorescence arising from the leaf sheath on a mature pseudobulb and has ovate-oblong, strongly concave, more or less blunt tipped floral bracts carrying wide-spreading flowers.
FLOWER SIZE: 3 inches [7.5 cm] long
-- information provided by Jay Pfahl, author of the
Internet Orchid Species Encyclopedia (IOSPE).
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