Characteristics of mung bean

Erect annual herb, 20-60 cm tall. Stem is brown long stiff hair. Pinnately compound leaves with 3 leaflets; Stipule peltate, ovate, 0.8-1.2 cm long, marginal seta; Stipule conspicuous, lanceolate; Leaflet ovate, 5-16 cm long, 3-12 cm wide, lateral more or less oblique, entire margin, apex acuminate, base broadly cuneate or rounded, both sides more or less sparsely hairy, base triveined conspicuously; Petiole 5-21 cm long; Leaf axis length 1.5-4 cm; Petiole length 3-6 mm. Racemes axillary, with 4 to a few flowers, up to 25; Total peduncle length 2.5-9.5 cm; Pedicels 2-3 mm long; Bracteoles linear-lanceolate or oblong, 4-7 mm long, linear, subpersistent; Calyx tube glabrous, 3-4 mm long, lobes narrowly triangular, 1.5-4 mm long, marginal hairy, upper pair forming an apex 2-lobed lobe; Flag petals nearly square, 1.2 cm long, 1.6 cm wide, yellowish-green outside, sometimes pink inside, tip slightly concave, curved, glabrous; Wing flap ovate, yellow; The keel flap is sickle-shaped, green and pink, with a prominent sac on the right side. Pod linear cylindrical, spreading, 4-9 cm long, 5-6 mm wide, covered with pale brown, scattered long stiff hairs, more or less constricted between seeds; Seeds 8-14, pale green or yellowish-brown, short cylindrical, 2.5-4 mm long and 2.5-3 mm wide, umbilical white and not sunken. Flowering in early summer, fruit in June to August.