An annual, with an erect branching stem, about 1 ft. in height. Branches ascending, slender, clothed with stellate hairs. Leaves subsessile, elliptic-oblong, acute, 1–1 1/2 in. long, serrate, with simple hairs above, stellate ones on the lower surface. Stipules persistent, falcate, lanceolate, pilose, twice the length of the petioles. Peduncles axillary, solitary, 1-flowered, spreading, generally longer than the leaves, slender, pilose near the top. Filaments petaloid, obovate; anthers 2-fid. Capsule obovoid, somewhat 5-lobed, 5-valved; valves with two horns at the upper angles. Seeds reniform, transversely furrowed.