Herbs perennial. Stem erect, 60-100 cm, solitary, branched toward apex, densely appressed retrorse puberulent. Petiole of basal leaves 1-2 cm, ± narrowly winged; leaf blade ovate, 6-7 × 4-5 cm, subequally 3-lobed, ± leathery, adaxially densely strigose-hirtellous, scabrid, corrugate, abaxially appressed hirtellous, yellowish glandular, base broadly cuneate, margin coarsely serrate-dentate, apex acute; mid stem leaves simple, with petiole less than 1 cm, leaf blade oblong, margin serrate-dentate. Verticillasters many flowered; floral leaves sessile, linear-oblong, ca. 3 × 1 cm, entire or 1-or 2-serrate-dentate; bracteoles few, spiny, straight, 5-6 mm, hispid. Flowers sessile. Calyx tubular, 7-8 mm, hirtellous, hirsute on veins, yellowish glandular, base stramineus; anterior teeth ca. 5 mm, straight, subulate, apex spinescent; posterior teeth equal, ca. 3 mm, straight, triangular-subulate, apex spinescent. Corolla white or with purple spots, ca. 1.8 cm, pilose; tube ca. 8 mm, scaly annulate inside; upper lip oblong-ovate, to 1 cm, subrounded, straight, margin entire; lower lip ovate, ca. 8 × 5 mm; middle lobe obcordate, 2-lobulate; lateral lobes ovate. Nutlets black-brown, oblong, triquetrous. Fl. Aug-Sep, fr. Sep-Oct.
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