Flowers 5-merous. Hypanthium obconic, glabrous, 3-angled. Calyx-lobes short, obtuse. Petals obovate, ephemeral. Stamens nearly isomorphic, somewhat unequal in size; anthers linear or narrowly oblong, obtuse; connective prolonged below the thecae, minutely tuberculate dorsally at base, extended below the summit of the filament into a single ventral spur. Capsule trigonous, expanded laterally into a triangular summit depressed at the center; seeds obpyramidal. Rhizomatous herbs, often epiphytic, the leaves apparently all basal, one member of each pair minute and rarely persistent at anthesis; flowers few, pink or white, sessile in a secund spike on an elongate scape.
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