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DescriptionErect annual herb up to c. 14 cm high, branching from near the base. Leaves opposite, subsessile, broadly ovate to almost circular, 9-20 mm long, shortly hairy on margins and veins beneath; margin serrate-crenate. Flowers solitary in the upper leaf axils, Pedicels 3-14 mm long slender. Calyx 2.5-3.5 mm long; lobes 1-1.5 mm long unequal. Corolla blue to lilac with darker blue or violet tinge, c. 6 mm long; upper lip oblong, 2 mm long, entire; lower lip 3-lobed, 2.5 mm long. Capsule ovoid-cylindric, 4.5-6 mm long, shortly beaked.