Densely hairy annual with erect, branched or simple stems, to c. 50 cm high. Basal lvs shortly petiolate, to 5 × 1 cm, oblong or nearly so; hairs slightly appressed, with pulvinate bases above; apex obtuse to acute; upper lvs sessile, smaller, linear or linear-oblong. Cymes short, < leafy bracts. Calyx divided ± to base; lobes linear or linear-lanceolate, to c. 1 cm long at fruiting, with spreading hairs. Corolla scarcely > calyx, c. 5-10 mm long; limb c. 3-4 mm diam., white or whitish, glabrous outside except near base. Stamens inserted below middle of corolla tube. Nutlets 3-3.5 × 2-2.5 mm, ovoid-trigonous, tuberculate, greyish brown.