Tufted, shortly rhizomatous perennial herbs. Aerial stems branched; leaves few or reduced to scales, basal or along stems. Inflorescence a terminal umbel. Flowers bisexual, pedicels articulate above midway, sepals and petals subequal, free, twisting spirally after anthesis; stamens 6, attached to perianth bases, filaments hairy below the anthers, anthers dorsifixed; ovary superior, 3-lobed, 3-locular, ovules few per locule; style filiform, stigma minute, capitate. Fruit a schizocarp with 1–3 mericarps, each with a single oblong, angular, black seed.
7 species in Australia, of which 1 extends to New Guinea; 2 in Victoria.