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.
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An annual plant. It grows 40-60 cm high. The leaves have 1-3 leaflets along the stalk. The leaf blade is sword shaped and 10 cm long by 3.5 cm wide. There are teeth along the edge. The flowers can be red, purple, blue or white. The nutlets are brown.
Can be grown by cuttings or seedlings. Seeds needs stratification.
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