Annual or perennial, small, erect herb or downy undershrub; stems, petioles and pedicels with minute stellate and simple hairs; leaves cordate, oblong, obtuse, crenate, tomentose; petiole as long as the leaf; stipules linear, half the length of petiole; flowers small, yellow, axillary, solitary or few together; pedicels jointed near the apex; lower usually distant, longer than petioles, upper crowded, very short; epicalyx absent, calyx campanulate, triangular, acute or acuminate; petals-5, yellow, free above, slightly connate below, adnate to base of staminal tube; stamens numerous, stamina column dividing at the summit into numerous anther bearing filaments, anthers monothecous; carpels-5 or more, smooth, furrowed at back, awns-10, long, erect, covered with stiff, reflexed bristles; mericarps 8-10, compressed, trigonous, with retrosely hairy awns at the apex; seeds reniform.