Herbs annual or biennial. Taproots with dense, fibrous rootlets. Stems erect, 30-120 cm, retrorse strigose, nodes and angles densely strigose. Petiole of stem leaves 0.5-3 cm, narrowly winged at apex; lower stem leaf blades ovate, base broadly cuneate, 3-palmatipartite; lobes oblong-rhombic to ovate, 2.5-6 × 1.5-4 cm, pinnately divided, adaxially strigose, abaxially pilose, glandular; mid stem leaf blade rhombic, palmatipartite, lobes oblong-linear, base narrow cuneate. Verticillasters 8-15-flowered, 2-2.5 cm in diam.; floral leaves subsessile, linear to linear-lanceolate, 3-12 × 2-8 mm, entire or dentate; bracteoles spiny, shorter than calyx, ca. 5 mm, appressed puberulent. Flowers sessile. Calyx tubular-campanulate, 6-8 mm, appressed puberulent; teeth broadly triangular, 2-3 mm, apex spinescent. Corolla white or reddish to purplish red, 1-1.2 cm, villous; tube ca. 6 mm, inconspicuously scaly annulate inside; upper lip straight, concave, oblong, ca. 7 × 4 mm, margin entire, ciliate; lower lip slightly shorter, base sparsely scaly; middle lobe obcordate, base constricted, margin membranous, apex emarginate; lateral lobes ovate. Filaments sparsely scaly. Nutlets brownish, oblong, triquetrous, ca. 2.5 mm, base cuneate, apex truncate, smooth. Fl. Jun-Sep, fr. Sep-Oct.
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A herb. It can last for one or two years. It grows 30-120 cm tall.
Waste places, hillsides, roadsides and gardens. Sunny areas; at elevations up to 3,400 metres all over China.
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Waste places, hillsides, roadsides and gardens. Sunny areas to elevations of 3,400 metres all over China.
It is a subtropical plant.
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