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Species of this Genus


Perennial, erect herbs, rootstock horizontal, tuberous, glabrous or often with multicellular hairs. Leaves simple, spirally arranged, ligulate with broad, tubular sheath. Inflorescence on dense, globose or ovoid heads or spikes, bracts spirally arranged, overlapping, each subtending 1 or 2 flowers. Flowers bisexual, bilaterally symmetrical. Calyx 3-toothed, tubular or infundibuliform. Corolla 3-lobed, somewhat fleshy, united below. Labellum showy. Stamens 3, one fertile,  lateral staminodes minute or absent. Ovary trilocular, ovules many. Fruit a globose or ovoid capsule, irregularly dehiscent. Seeds obovoid, aril short.