Herbs. Taproot robust, short. Stems 12-32 cm, slender, often violet, glabrous toward base. Basal and lower stem leaves simple to 2-pinnate; petiole 1-7 cm; terminal leaflet narrowly ovate to lanceolate, 2.5-7.5 × 1-3.2 cm, adaxially puberulent or glabrous, abaxially purple, glabrous, base cuneate to rounded, margin remotely obtuse serrate, apex obtuse to rounded; lateral leaflets 1-3-paired; upper stem leaves simple or ternate. Inflorescences slightly puberulent; verticillasters 2-6-flowered, widely spaced, in terminal racemes or panicles; bracts purplish, lanceolate, ca. 2 mm, subglabrous. Pedicel ca. 2 mm. Calyx tubular, ca. 4.5 mm, glabrous, 2-lipped to ca. 1/4 its length, apically fine strigose inside; upper lip entire, apex acute; lower lip longer than upper. Corolla blue-purple to purple-red or white, ca. 8 mm, puberulent; tube pilose annulate inside, ca. 5.5 mm, gradually dilated from base, ca. 2 mm wide at throat; lips subequal, lower to ca. 4 mm wide. Filaments ca. 2 mm; connectives ca. 4.5 mm, upper arms ca. 3 mm, lower arms ca. 0.5 mm. Nutlets black, narrowly ellipsoid, ca. 0.8 mm. Fl. Jul-Sep.
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