Undershrub, 0.5-0.8 m. Stem and branches sparsely puberulent. Leaves thin-membranaceous, ovate to deltoid, (4-)7-ll by (3-)6-8.5 cm, with long bristles (c. 1 mm), scattered all over both surfaces; apex acute or broadly caudate, base cuneate or truncate and shortly decurrent, entire; margin elsewhere shallowly and irregularly incised, serrate-crenate on the incisions; petiole (l-)4-6.5 cm, puberulent. Verticillasters densely congested in terminal, few-branched spikes, 3-6 cm long, 1.5 cm Ø; peduncle 0.5-3 cm long, woolly. Bracts obovate, acute, equalling or slightly longer than the calyx, villous. Calyx tubular-campanulate, 4.5-5 mm long, outside with scattered bristles; teeth broadly lanceolate, margin ciliate. Corolla 5-6 mm long, lilac, tube very slender. Filaments shortly exserted, villous.
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