Perennial herb with a woody rootstock; stems erect, 10-30 cm, often branched above, eglandular-pilose below, usually thickly glandular-pilose above. Leaves mostly basal, variable, entire to pinnatifid, narrow oblong to ovate, 2-7 x 1.5-7 cm, eglandu1ar-pubescent with sessile glands, crenate to erose; petiole 1.2-8 cm. Verticillasters 4-6-flowered, distant or condensed above. Bracts ovate-acuminate, c. 6 x 6 mm; bracteoles present. Pedicel c. 2 mm. Calyx ± campanulate, 5-7 mm to 8-10 mm in fruit, and broadening, with villous glandular and eglandular hairs; upper lip shortly tridentate, broadly bisulcate. Corolla lilac to purple, 12-16 mm; tube ventricose, not squamulate, 6-7 mm; upper lip ± straight to subfalcate. Stamens B. Nutlets rounded trigonous, oblong, c. 2 x 1.5 mm. Fl. 3-5. Banks, in Quercus macchie, deciduous woodland, road- and fieldsides, s.l.-900 m.
S. & W. Europe, N.W. & N. Africa, Crimea, Cyprus, Palestine, Azerbaijan, Caucasus. Naturalised in other parts of the world . Medit. element. Very variable in indumentum, leaf shape and degree of lobing. Gynodioecism is frequent.