Description from Flora of China
Plants annual. Stems erect, 40-60 cm, sparsely villous along angles or subglabrous. Leaves 1-3-pinnate; petiole 7-9 cm; leaf blade 6-13 × 5-9 cm; upper stem leaves 1-pinnate, short petiolate; terminal leaflet lanceolate or rhombic, to 10 × 3.5 cm, pilose or glabrous, base long cuneate, margin obtusely serrate; lateral leaflets subsessile, ovate-lanceolate, 1.5-5 × 0.8-2.5 cm, base obliquely rounded. Verticillasters 2-6-flowered, in terminal racemes or panicles; rachis densely glandular pilose or pilose; bracts and bracteoles lanceolate, 2-5 × 0.5-1 mm, glabrous, margin entire. Pedicel 1-1.5 mm, pubescent. Calyx tubular, 4-6 mm, sparsely glandular pilose, white hirsute annulate on throat inside, 2-lipped to ca. 1/3 its length; upper lip triangular or nearly semicircular, ca. 2 × 3 mm; teeth narrowly triangular, apex long acuminate. Corolla reddish, purplish, bluish, to white, ca. 1.2 cm, densely villous; tube obliquely pilose annulate inside, ca. 9 mm, exserted, ca. 2 mm wide at base, to 3.5 mm wide at throat; upper lip elliptic to ovate, ca. 2.5 × 2 mm; lower lip ca. 3 × 4 mm, margin crenulate. Stamens exserted; filaments ca. 1 mm; connectives ca. 6 mm, straight or slightly curved. Nutlets brown, ellipsoid, ca. 1.7 × 0.5 mm. Fl. Jun-Sep.
* Hillsides, grasslands, wet areas, riverbanks, thickets, forests; 200-1200 m. Anhui, Fujian, Guangdong, Guangxi, Hubei, Jiangsu, Jiangxi, Sichuan, Taiwan, Zhejiang