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Perianth double, the outer hyaline, lobes chaffy, rigid, imbricate, inner tubular, hyaline, lobes ovate, spreading, broadly imbricate
Ovary superior, perfectly or imperfectly 3-locular; style simple
Fruit a capsule, opening by 3 valves septate in the middle
Inflorescence scapose, capitate or unilaterally spicate
Leaves radical, narrow, with parallel lateral nerves
Ovules few to solitary, basal or axile
Perennial herbs with a thick rhizome
Flowers hermaphrodite, actinomorphic
Seeds with copious mealy endosperm
