Biennial or perennial herb, with fibrous roots. Basal leaves forming a conspicuous rosette. Rosulate leaves sessile, often cartilaginous. Flowering stems 5-60 cm high, simple, fleshy, erect. Leaves alternate, sessile, fleshy. Inflorescence terminal paniculate-thyrsoid-raceme. Bract similar to cauline leaf. Flowers pedicellate or subsessile, bisexual, 5-6 merous. Calyx lobes basally connate, fleshy, green. Petals basally connate or free, white, pinkish, red, yellowish or greenish. Stamens 5-6 or 10-12, in one or two whorls, anthers basifixed. Nectar scales oblong, yellowish. Carpels basally stipitate – attenuate, apocarpous, style slender, ovules many. Follicles many seeded.