stem herbaceous, robust, ascending; branches glandular-villous; leaves petiolate or the uppermost sessile, oblong, oblong-lanceolate or sometimes ovate, acute or rounded, cuneate to cordate at the base, irregularly crenate, erose-dentate or shortly lobed, often distinctly rugose, pubescent, up to 8 in. long and 2 1/2 in. broad, often about 2 1/2 in. long and 1/2– 3/4 in. broad; petiole up to 3 in. long; whorls 6–10-flowered, finally distant, in simple or much-branched racemes 6–12 in. long or more; bracts broadly cordate, abruptly acuminate, shorter than the calyx; calyx campanulate, 4–5 1/2 lin. long, 13-nerved, covered with gland-tipped villous hairs; upper lip broadly obovate, 3-toothed, recurved; teeth small, often pungent, connivent; lower lip bifid; teeth ovate-triangular, 1 1/2–2 lin. long, acuminate-pungent; corolla white or purple and white, 8–10 lin. long; tube 4–5 lin. long, ventricose at the throat; upper lip falcate, 4–6 lin. long, shortly 2-lobed; lower lip 3 lin. long, 3 1/2 lin. broad; median lobe broadly obovate-cuneate, 2 lin. long, 3 1/2–4 lin. broad; lateral lobes ovate or oblong, erect, 1 1/4–2 lin. long, 3/4–1 1/4 lin. broad. null
