Erect epiphytic herbs. Plants typical of the genus. Staminate and pistillate flowers identical except for the column. Staminate flowers those most frequently seen: sepals and petals membranaceous, green aging greenish yellow, strongly re-flexed. Lip white, with an elongate basal claw, ovate, acute, the fleshy mid-section strongly ventricose, usually without thinner lateral margins, the apex membra-naceous. Basal callus broadly rounded, not projecting, the surrounding lunate, dark green blotch not depressed.
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