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Herb 0.5-1 m. Stem and branches densely villose. Leaves chartaceous, ovate to broadly ovate, 7-10 by 4.5-7.5 cm (sometimes much smaller), serrate or crenate-serrate; adpressedly pubescent on both surfaces; acute, base rounded or subcordate, often abruptly cuneate; petiole slender, 1-7 cm. Paniculate thyrse, 10-35 cm. Bracts narrowly lanceolate, 2-5 mm. Calyx turbinate, 3-4 mm long, in fruit 6-7 mm, hirsute and glandular; teeth triangular, subequal. Corolla yellow or reddish, 12-16 mm, pubescent; upper lip reddish brown, hooded; lower lip shallowly 3-fid, the central lobe narrowly elliptic, laterally spreading. Nutlets ovoid, flattened, 1.5 by 1 mm, finely granular.
