Herbs erect. Rhizomes woody. Stem erect, 60-90 cm, solitary, angles retrorse puberulent, nodes densely pilose. Petiole of stem leaves 1-1.2 cm; leaf blade subcircular, ca. 5 cm in diam., palmately 5-partite, pilose, abaxially glandular, base cordate; lobes oblong, ca. 1 cm wide, margin irregularly serrate, apex caudate-acuminate. Verticillasters to 1.5 cm in diam., many flowered, in spikes 5-20 cm; floral leaves with petioles 1-1.5 cm, blade narrowly rhombic, 3-partite, base cuneate, lobes linear-lanceolate; bracts spiny-aristate, 3-5 mm, pilose. Flowers sessile. Calyx obconical, densely puberulent, pilose, conspicuously veined, tube ca. 4 mm; teeth triangular, anterior teeth narrow, ca. 2.5 mm; posterior teeth 2 mm, spinescent, reflexed in fruit. Corolla ca. 8 mm; tube ca. 4 mm, pilose, obliquely pilose annulate inside, conspicuously dilated beyond annulus; upper lip straight, slightly concave, oblong-ovate, pilose; lower lip horizontally spreading, middle lobe largest, lateral lobes ovate. Immature nutlets brown, triquetrous, oblong, base cuneate, apex truncate. Fl. Jul, fr. Aug-Sep.
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