Plants perennial. Rhizome prostrate. Stems erect, 30-40(-100) cm, pubescent, becoming subglabrous, purplish. Leaves pinnate, 10-20 cm, 5-7-foliolate; petiole 4.5-11 cm; terminal leaflet broadly ovate to ovate-elliptic, 3-6.5 × 1.8-3.5 cm, abaxially glabrous, pubescent on veins, base rounded to shallowly cordate, margin serrate, apex long acuminate; lateral leaflets smaller, base oblique. Inflorescences glandular pilose; verticillasters (2-)4-8-flowered, widely spaced, in terminal racemes or panicles 15-35 cm. Pedicel ca. 4 mm. Calyx tubular, ca. 9 mm, pilose, puberulent mainly toward base, white hirsute on throat, 2-lipped to 1/4 its length; upper lip broadly triangular, ca. 3 × 5 mm; lower lip larger, triangular, ca. 4 × 5 mm, teeth narrowly triangular. Corolla yellow or purple, to 2.5 cm, pilose; tube much exserted, to 1.5 cm, ca. 2 mm wide at base, to 6 mm wide at throat, not hairy annulate inside; upper lip folded-falcate, ca. 12 × 4 mm, nearly at a right angle to lower lip; lower lip spreading, oblong, ca. 8 × 6 mm; middle lobe obcordate, ca. 4 × 5 mm. Filaments ca. 4 mm; anthers ca. 5 mm, connectives ca. 1.4 cm, upper arms ca. 1 cm, lower arms ca. 4 mm. Nutlets brownish, ellipsoid, ca. 2.5 mm, apex slightly pubescent. Fl. May-Jun, fr. Jul.
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