Hairy annual; stems much-branched, decumbent, to c. 15 cm long, densely covered with crisped hairs, not rooting at nodes. Petioles to 5 mm long. Lamina 3-8 × 3-8 mm, ovate, often broadly so, or suborbicular, coarsely crenate-serrate, often glabrate above, rather densely covered with crisped hairs below; base truncate or nearly so; apex obtuse. Fls axillary, solitary, in axils of lvs similar to vegetative lvs; pedicels c. 5 mm long, to 8 mm at fruiting, mostly > subtending lvs. Calyx 2-3 mm long, hairy or glabrous; lobes broadly ovate, prominently ciliate, obtuse or rounded. Corolla c. 6 mm diam., ± uniformly blue. Capsule c. 4 mm wide, not deeply lobed; nerves usually inconspicuous; lobes obtuse, ± erect, rounded on outer margin, densely hairy with straight glandular and short curly eglandular hairs. Seed broadly elliptic, concave on 1 face, irregularly transversely ridged on convex side.