Annual or perennial herbs. Leaves
usually ± circular-reniform in outline. Flowers
usually fasciculate, axillary, pink, mauve, purple or
sometimes white. Epicalyx of 3, ± free, linear or
ovate bracts. Calyx cup-shaped, 5-lobed; lobes triangular.
Petals usually emarginate at apex. Ovary of 9-15 free carpels.
Fruit a discoid schizocarp, separating into 9-15,
indehiscent, awnless mericarps.
Worldwide: 40 species, occurring in Europe, the Mediterranean region, temperate Asia and on tropical African mountains
Zimbabwe: 4 taxa.