Erect, branched herb, 50-75 cm. Stem and branches puberulent, scattered, with long white hairs. Leaves ovate to broadly ovate, thin-membranaceous, 5-10 by 3.5-7 cm, obtuse or shortly acuminate, base rounded or cordate; margin coarsely and irregularly crenate, ciliate on both surfaces; petiole 3-6 cm. Pseudo-raceme terminal, solitary, 6-15 cm long including the peduncle; verticillasters 3-8-flowered, internodes 1-2 cm, more or less evenly apart. Bracts filiform, 2 mm, puberulent, ciliate. Calyx tubular, 4.5-6 mm long, puberulent and very sparingly pilose, narrowed at both ends; teeth oblong-lanceolate, ciliate. Corolla lilac.