Bulbous perennial herbs. Roots fleshy-fibrous. Leaves annual, numerous, linear, distichous. Inflorescences several per plant, scapose, usually single-flowered with 2 subtending spathe-bracts; flowers bisexual; perianth segments fused in lower half, spreading above; stamens 6, inserted at 2 levels on the tube, filaments filiform, anthers dorsifixed, dehiscing introrsely; ovary superior, subglobose; style filiform, stigma shortly 3-lobed. Fruit a loculicidal capsule; seeds numerous.
About 10 species, from South America; 1 naturalised in Australia.