Herbs with short rhizomes and tuberous roots. Stem leafy at the base, scapose, sheathed with fibrous leaf bases. Leaves sessile, conduplicate, sheathing, linear. Flowers in racemes or thyrses; pericladium present; flowers several per node, subtended by several bracts; tepals free, white or yellow, marcescent. Anthers introrse, basifixed, filaments short, broad, united basally, smooth. Ovary small, ovoid; ovules 4-8 per locule. Capsule ovoid, 3-lobed, seeds angular.