Herbs perennial, 40-80 cm tall. Stem erect, pilose at first, later glabrescent. Leaves paripinnate; stipules semihastate, 10-15 × 3-5 mm, margin toothed, apex long acuminate; leaflets 2-6-paired, linear to narrowly lanceolate, those on upper part of stem often broader (sometimes to lanceolate) than those on lower part, 40-65(-90) × 3-13(-25) mm, abaxially slightly hairy, apex acuminate or long caudate, mucronate; tendril absent, replaced by a mucro. Raceme 2-or 3-branched, 3-7 cm, subequaling or longer than leaf, 4-9-flowered. Calyx campanulate. Corolla red, purple-red or blue; standard obovate-oblong, ca. 13 mm, longer than wings and keel, apex retuse. Ovary glabrous; ovules 5 or 6. Legume oblong, flat, 25-33 mm, both ends acuminate. Seeds 3-6. Fl. Jun-Sep, fr. Jul-Sep. 2n = 12, 24.
More
A herb. It keeps growing from year to year. The stems are erect and it grows 40-80 cm tall. The leaves have leaflets in pairs along the stalk. There are 2-6 pairs of leaflets. These are narrowly sword shaped and 40-65 mm long by 3-13 mm wide. There are 4-9 flowers in a group. They are red, purple or blue. The pod is oblong and flat and 25-33 mm long. There are 3-6 seeds.
Woods, C. and S. Japan. Mixed forests, grasslands on hill slopes, meadows; at elevations from 600-1,800 metres. Forests and forest edges.
More
It is a temperate plant. In north China it grows between 600-1,800 m above sea level.
Can be grown by seedlings. Seeds needs soaking.
Home