Annual herb, 30-100 (120) cm tall. The main root is short and thick, with many fibrous roots, and the rhizomes are pink and dense. Stem stout, erect, 0.7-1 cm in diameter, quadrangular, hollow, glabrous.

Even-pinnately compound leaves, with apical tendrils of the leaf rachis shortened to a mucro; stipules hastate or sub-triangular-ovate, 1-2.5 cm long, ca. 0.5 cm wide, slightly serrate, with dark purple densely glandular dots; leaflets usually in 1-3 pairs, alternate, distal leaflets up to 4-5 pairs, basal ones less frequent, leaflets elliptic, oblong or obovate, sparsely orbicular, 4-6 ( -10) cm, 1.5-4 cm wide, apex rounded, mucronate, base cuneate, entire, both surfaces glabrous.

Cultivation techniques

China's faba bean production area is divided into autumn sowing area and spring sowing area, southwest and Yangtze River Basin and other autumn sowing area of the faba bean in the autumn sowing, the next spring and summer harvest; northwest and other spring sowing area of the faba bean in the spring sowing, the year harvested in the fall. Fava bean as rice, wheat and corn crops such as a good stubble, in crop rotation or set crop occupies an important position, especially in the paddy field soil fertilization and pest control has an important role.