Annual herbs, with milky juice. Stems erect,
mostly bristly. Leaves mostly on stems, sometimes in a rosette at base, mostly
pinnatifid or pinnatipartite, entire or mostly incised; segments variously
incised; lower leaves petioled, upper sessile. Flowers solitary, terminal and
axillary on leafless scapes, sometimes paniculate; flower buds subglobose. Sepals
2 (-3), free, caducous, ovate-orbicular. Petals 4 (-6), in 2 whorls,
obovate-orbicular, yellow or white. Stamens many; filaments filiform or
dilated; anthers orbicular to linear. Ovary mostly ovoid, rarely
cylindrical-oblong; ovules many on parietal placentae; stigmas sessile, 4 - 20.
Capsules oblong, glabular, obovate or subcylindrical, dehiscing by subapical
pores. Seeds very small, kidney-shaped, brown, black, dark-grey or white.