Herbs perennial. Stems erect or slightly flexuous, 30-120 cm, branched toward apex, hispid, angles glandular puberulent. Petiole slender, 3-6.5 cm; stem leaf blades ovate-cordate, 8-12 × 5-9.5 cm, adaxially shiny, appressed villous-hispid, abaxially gray-green, yellowish glandular, villous-hispid along veins, base cordate, margin coarsely callose crenate-serrate, apex acuminate. Spikes 10-20 cm; verticillasters 6(-8)-flowered, widely spaced; lower floral leaves petiolate, 10-15 × 2-4 mm, margin dentate; upper floral leaves sessile, oblong-lanceolate, slightly longer than verticillasters, margin entire; bracteoles minute or absent. Pedicel ca. 1 mm. Calyx tubular-campanulate, ca. 7 mm, spreading hispid, glandular puberulent, 10-veined, accessory veins inconspicuous; teeth triangular-lanceolate, 2-3 mm, subequal, apex spinescent; fruiting calyx slightly saccate-dilated. Corolla red to purple, ca. 1.4 cm, sparsely puberulent; tube straight, ± saccate; upper lip straight, oblong, ca. 5 × 3 mm; lower lip spreading, ca. 7 × 6 mm; middle lobe subcircular, emarginate; lateral lobes ovate. Filaments villous below middle. Style nearly exserted. Nutlets dark brown, triquetrous, ovoid, glabrous. Fl. Jul-Aug, fr. Aug.
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Rhizomatous, strongly aromatic or foetid perennial herb, to 80-(100) cm tall, densely hirsute, with many glandular hairs, also with sessile, white, glandular scales. Petioles to 7 cm long in lower lvs, often much less in upper lvs. Lamina 5-10 × 3-6 cm, usually ovate, sometimes oblong-ovate, deeply crenate-serrate and teeth often mucronulate; base cordate; apex acute. Bracts remotely toothed or entire, very different from foliage lvs. Calyx 6-8 mm long; tube > teeth; teeth c. 3 mm long, narrow-triangular, acuminate, ± purple. Corolla 12-16 mm long, reddish purple with whitish markings on the downward curved, spathulate, lower lip; tube exserted from calyx; upper lip hooded, with dense simple and glandular hairs outside; lower lip c. 9 mm long × 8 mm across lateral lobes, > upper lip. Nutlets c. 1.5-2 mm diam., broad-obovoid or suborbicular, trigonous, smooth, almost black.
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