Erect, annual herb, 5-10 cm tall. Cauline leaves c. 3.5 x 2 mm, elliptic, 2-lobed, with truncate base; lobes acuminate, as long as broad, all antrorse. Floral leaves similar to cauline leaves, but ovate, and lobes longer than broad, c. 4 x 3 mm. Flowering begin at node 2. Raceme dense. Flowers c. 7 mm long; pedicels c. 1 mm long. Calyx c. 4 mm long hairy, hairs of the same type as on leave; lobes c. 2 x 0.5 mm, equal; tube c. 2 mm long. Corolla white, dorsally c. 6 mm long; tube 3 mm long, externally slightly pubescent especially on the upper lip. Upper lip 3 mm long, lower lip 3 mm long; lobes obovate-oblong, obcordate, erose-slightly notched, middle lobe largest 3 x 2 mm, left and right lobe equal, 2 x 1.5 mm long. Two antehrs with unequal and two with equal awns, densely hairy; hairs short, equalling the longer awn. Capsule c. 4.5 x 1.5 mm, oblong, retuse, longer than the calyces, ciliate at the upper part; cilia soft. Seeds 5-9 per capsule, 1.2-1.5 x 0.3-0.6 mm, oblong, acute.