General: Perennial herb from a rhizome; stems erect, 40-80 cm tall, branched, 4-angled, densely felted with white, woolly hairs.
Leaves: Opposite, lanceolate to oblong, 5-10 cm long, narrowed at the base, the margins toothed, the teeth mostly hidden by the dense hairs.
Flowers: Inflorescence a dense, white-woolly spike; corollas tubular, purple, 12-14 mm long, woolly-hairy; calyces tubular, the teeth hidden by the dense hairs.