Herbs, perennial, terrestrial. Roots tuberous, fascicled, fleshy. Stems with foliaceous sheaths. Leaves usually absent at anthesis, basal or cauline, base cuneate. Inflorescences terminally flowered spikes. Flowers resupinate; perianth parts distinct and/or free; sepals similar, basally connivent, forming inflated nectary; lip free, oblong-ovate, arcuate, base conduplicate, apex acute; column partially adnate to dorsal sepal, not inflated adaxially at base; anther ovate-cucullate, margins entire; viscidium rounded; rostellum longer than wide; stigma 2-lobed at apex. Fruits capsules.
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