东北山黧豆 dong bei shan li dou

Herbs perennial, 40-70 cm tall. Stem erect, glabrous, wingless. Leaves aristate at apex; stipules semisagittate, sub­ulate, occasionally linear, falcate with a short (ca. 2 mm) basal spur, 5-15 × 1-3 mm; leaflets glaucous-gray abaxially, dark green adaxially, (2 or)3- or 4(-6)-paired, lanceolate or narrowly lanceolate on lower stem leaves, narrowly ovate, rarely oblong on upper stem leaves, 40-60 × 15-25 mm, glabrous, with retic­ulate veins, apex shortly mucronate. Raceme 4-8-flowered. Ca­lyx campanulate, ca. 11 mm, glabrous; longest tooth ca. 4 mm. Corolla purple-red, 1.8-2.5 cm; standard ca. 21 mm, with claw; wings equaling standard, ovate. Ovary linear, glabrous. Fl. May-Jun.

Forested slopes. Heilongjiang, Jilin [Korea].