Rhizomatous, lemon-scented herb with branched puberulent stems ascending to c. 60 cm. Lvs and bracts petiolate. Lamina 2-8.5 × 1-7 cm, elliptic to broad-ovate, hairy, sometimes only sparsely hairy above, prominently crenate-serrate; base ± truncate in larger lower lvs, cuneate in upper smaller lvs and bracts. Verticels generally 3-10-flowered. Calyx c. 8 mm long; nerves prominent, with long, white, pilose hairs; upper teeth broad-triangular, aristate; lower narrow-triangular, aristate. Corolla 12-15 mm long, white; lobes hairy outside. Nutlets 1.7-2 mm long, almost black.