Shrubs, or scapose perennial herbs. Leaves ovate to linear-acuminate, coriaceous, more or less succulent, spinose- dentate, usually aggregated into dense rosettes. Inflorescence of 1 or more axillary (often subterminal), bracteate racemes or panicles; flowers red, orange or yellow, pendent or deflexed at full anthesis. Perianth cylindrical; outer 3 segments free or variously connate; inner 3 free from each other but sometimes adnate to the outer. Stamens exserted or equalling perianth; anthers extrorse, basifixed. Fruit a loculicidal capsule; seeds numerous.