Annual or perennial leaf succulent herbs, or subshrubs. Leaves alternate. Flowers bisexual or pistillate, in clusters of (1-)3(-9) in the axils of bracts, subtended by usually 3 scarious bracteoles; perianth 5-lobed, the lobes free or united to the middle, keeled, or rounded on the back, sometimes cucullate or horned; stamens 5, exserted. Pericarp free from the perianth, heterocarpy common; seeds horizontal or vertical. Zn = 18, 54. About 100 spp., worldwide. Iljin (l.c.) distinguished eight sections.
Iljin, Sov. Bot. 5: 39-49 (1936)
Intr: 333 (1777)
Hopkins and Blackwell, Sida 7: 147-173 (1973).