Erect simple or usually much-branched herb, 12–32(–37) cm high; branches ± erect, 4-angled, glandular-pubescent, viscid with a foetid scent. Leaves narrowly elliptic or lanceolate, 0.5–5 cm long, 3–15 mm wide, narrowed to base or amplexicaul, acute at apex, margins serrate from the middle to the apex, finely glandular-pubescent. Flowers solitary in axils forming a leafy spike-like raceme; pedicels 1–3 mm long; bracteoles 2 at the base of the calyx, narrowly linear, ± 3 mm long, ciliate. Calyx ± 5 mm long in fruit, shorter in flower, lobes subulate-linear, acuminate, finely glandular-pubescent. Corolla white, ± 6 mm long, upper lip emarginate, lower lip broadly and shortly 3-lobed. Capsule 5–6 mm, narrow, acuminate, almost as long as the calyx, glabrous. Fig 14, p. 37.
