狭叶山黧豆 xia ye shan li dou

Lathyrus laevigatus (Waldstein & Kitaibel) Grenier subsp. krylovii (Sergievskaya) Hendrych.

Herbs perennial, 60-80 cm tall. Stem erect, glabrous, wing­less. Leaves aristate at apex; stipules semisagittate, lanceolate or linear, 10-25 × 3-7 mm; leaflets 2-4-paired, linear to linear-lanceolate, 50-130 × 3-16 mm, glabrous, with pinnate veins. Raceme longer than leaf, 2-4-flowered. Calyx campanulate, ca. 8 mm, glabrous; longest tooth ca. 1.5 mm. Corolla yellow, 2-5 cm; standard orbicular, ca. 2.7 cm, with claw; wings narrowly obovate, auriculate at base. Ovary linear, glabrous. Legume brown, linear, 8-9 cm. Seeds elliptic, 3-4 mm. Fl. Jun-Jul, fr. Aug-Sep.

Hill forests; ca. 1800 m. Xinjiang [Russia].