Habit : An annual herb with more or less hairy stems and branches.
Leaves : Elliptic or oblong-lanceolate, acute or obtuse, serrate (the lower serratures often destitute of filiform appendages), somewhat rough below, base rounded or cuneate; petiolate, petioles pilose, stipules lanceolate-subulate.
Inflorescence : Short cymes.
Buds ovoid or obovoidapiculate; bracts lanceolate-subulate; peduncles very short, leaf opposed, hairy; pedicels very short, pubescent.
Sepals long, linear-oblong, acuminate.
Petals oblong, slightly longer than the sepals.
Capsules with a short erect beak, hairy when young with stiff stellate hairs, scabrous when old, 3-4 angled, 3-4 valved; valves with transverse partitions between the seeds.