Plants perennial. Stems robust, ca. 1 m. Leaves 1-(or 2)-pinnate, 10-20 cm, 5(-7)-foliolate; petiole 4-6 cm, concave-convex, retrorse villous or densely spreading bristly; terminal leaflet ovate-lanceolate, 4-7.5 × 2-4.5 cm, herbaceous, glabrous, finely pilose on veins, margin crenate-serrate or serrate, apex acuminate to caudate-acuminate; lateral leaflets smaller. Inflorescences densely glandular villous; verticillasters 8-to many flowered, in terminal racemes or panicles 14-30 cm; bracts lanceolate, 3-4 × ca. 1 mm, margin entire, ciliate. Pedicel ca. 4 mm. Calyx tubular, 8-10 mm, glandular pilose, pubescent, white bristly at throat inside, 2-lipped to ca. 1/4 its length; upper lip broadly triangular, ca. 2 × 5 mm, apex ± 3-mucronate; lower lip triangular, ca. 1.5 × 4 mm, apex shallowly 2-toothed. Corolla purple to blue-purple, 1.9-2.4 cm, puberulent; tube obliquely hairy annulate, gradually dilated at apex, to 7 mm wide at throat; upper lip slightly falcate, 0.8-1.2 cm × ca. 5 mm; lower lip oblong, ca. 1.1 × 1.2 cm; middle lobe obcordate, ca. 3 × 6 mm. Filaments ca. 4 mm; connectives ca. 1.9 cm; upper arms to 1.5 cm, lower arms ca. 4 mm. Nutlets brown, ellipsoid, ca. 3 mm, apex hairy. Fl. Mar-Jul.
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