Annual herb with lax, hairy, spreading to erect stems to c. 50 cm long, often < 7 cm long in dry situations. Petioles to c. 6 cm long, slender. Lamina 2-4.5 × 1.5-3.2 cm (infl. lvs sometimes smaller), ovate to suborbicular, hairy, especially above, crenate; base truncate to cordate. Bracts similar to lvs but often larger and with short petioles. Calyx 4-9 mm long, accrescent, hairy; teeth ± = tube, subulate, often purple. Corolla 10-14 mm long, purple or deep pink; tube with prominent ring of hairs inside near base; upper lip 3-4 mm long, tomentose outside; lower lip spotted dark purple, deeply emarginate, the lateral lobes very small and toothed. Nutlets 2.2-5 mm long, sharply angled, often patterned white.
A herb which completes its lifecycle over one or two years. It grows 30 cm tall. The stems lie along the ground. The leaves are furry. The upper leaves are on short stalks and clasp the stem. The look a little like stinging nettles but they do not sting. The flowers are pinkish-purple and 14-20 mm long.