Aromatic annual or perennial, somewhat succulent herb, up to 60 cm high, growing from a fibrour root system. Stems erect, ascending or decumbent, 4-angled, sparsely branched, covered with spreading glandular and eglandular hairs and red sessile glands, often becoming sticky towards the inflorescence. leaves opposite, spreading, somewhat fleshy, obovate ot elliptic, 15-80 mm long, pubescent and with red sessile glands; margin serrate to crenate, slightly rolled under; petiole mostly 5-25 mm long. Inflorescences fairly lax with 6-flowered verticels c. 10 mm apart; bracts pale green, often marked purplish ovate with an aoical point, together forming a distinct terminal cone on the inflorescence. Calyx 3-5 mm long, pubescent and with red and pale sessile glands. Corolla blue to purple, 11-20 mm long with scattered hairs and red sessile glands on the lobes; lower lip, horizontal, boat-shaped, 5-11 mm long, partially enclosing the stamens.