Bulbous perennial herbs, the bulb with an extended neck sometimes protruding above ground-level. Leaves annual to perennial, subterete, flat or channelled. Inflorescence an umbel or single flower, terminating a stout, leafless scape, enclosed in bud by a pair of membranous, spathe-like bracts; flowers bisexual; perianth segments equal, fused in basal part into a long slender tube, spreading above; stamens 6, attached at throat of tube, filaments filiform, anthers attached medially, dehiscing introrsely; ovary inferior, 3-locular; ovules 1–12 per locule; style filiform, stigma slightly 3-lobed. Fruit globular, indehiscent; seeds 1–several, relatively large.
About 100 species, mostly in the tropics and subtropics world-wide; 5 currently recognized species in Australia, but several unnamed taxa exist in the far north of the country, 1 species in Victoria.