Plants perennial. Tuberous roots 2 or 3, scarlet outside. Stems erect, ca. 30 cm, densely spreading white villous. Leaves mostly basal; petiole 2.5-10 cm, villous; blade simple, trifid, or pinnate; stem leaves 1-or 2-paired, short petiolate; blade of simple leaves oblong-elliptic, 2-8 × 1.5-3.5 cm, papery, abaxially purplish, densely or sparsely villous, rarely glabrescent, finely corrugate, base cordate to rounded, margin crenate, apex obtuse to rounded; terminal lobes of compound leaves largest, ovate to elliptic. Inflorescences villous, glandular puberulent; verticillasters 4-6-flowered, widely spaced, in terminal racemes or panicles 7-13 cm; bracts shorter than pedicels, pubescent. Pedicel ca. 3 mm. Calyx campanulate, 7-9 mm, abaxially tinged purple, glandular, villous on veins; upper lip broadly triangular, ca. 2.5 × 6.5 mm, apex mucronate; lower lip ca. 3 × 5 mm. Corolla blue-purple, 2.5-3 cm, pubescent; tube sparsely puberulent below middle inside, 1.3-1.5 cm, funnelform, ca. 2.5 mm wide at base, to 6 mm wide at throat; upper lip falcate, 9-11 × ca. 4.5 mm; middle lobe of lower lip with undulate margin; lateral lobes ovate, ca. 2.5 mm wide. Filaments ca. 3 mm; connectives 6-10 mm, upper arms ca. 2 × as long as upper. Nutlets black, ellipsoid. Fl. Apr-Aug.
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