Erect, annual herb, 8-15 cm tall. Cauline leaves 5-6 x 2.5-3 mm, ovate-elliptic, 3-lobed, with truncate base; lobes acute-acuminate, longer than broad, upper antrorse, lower patent. Floral leaves 4-6.5 x 3-5.5 mm, ovate-broadly ovate, 4-5 lobed, with truncate base; terminal lobe acuminate, lateral lobes acuminate-slightly aristulate, longer than broad, upper antrorse, lower patent. Racemes dense. Flowers c. 8 mm long; pedicel c. 1 mm long. Calyx 4-5 mm long; lobes 2-2.5 x 0.5-1.5 mm, equal; tube 2-2.5 mm long. Corolla white tinged purple, dorsally 6-7 mm long; tube 3-4 mm, externally slightly pubescent especially on the upper lip. Upper lip 3-4 mm long, lower lip 3-5 mm long; lobes oblong-obovate, obcordate, arose-deeply notched, middle lobe largest 2-3 x 1-2 mm, left lobe 2-3 x 1-1.5 mm, right lobe 2-2.5 x 1-1.5 mm, left and right lobes unequal. Two anthers with unequal and two with subequal awns; hairs short. Capsule 4-6 x 2-3 mm, oblong, retuse, equalling the calyces, ciliate at the upper part; cilia soft. Seeds 14 per capsule, 1.1-1.7 x 0.25-0.80 mm, oblong, acute.