The method of distinguishing red beans from red beans: red beans are flat and red beans are round; Compared with red beans, adzuki beans are relatively slender, and the particles of adzuki beans are smaller than red beans; Adzuki beans are usually dark red, sometimes brown, black or grass yellow, while red beans are mainly dark red.

Red beans:

Red beans, acacia plants in Leguminosae, are widely distributed in tropical areas. Red beans like light, deep roots, tough wood, strong wind resistance, developed roots and nodules, which can fix free nitrogen in the atmosphere. Red bean is a vine, with slender stems, many branches, pinnately compound leaves, 8~ 13 pairs of leaflets, membranous, opposite and nearly oblong. Racemes are axillary, with short inflorescence axes, small flowers and dense heads; Calyx bell-shaped, corolla purple, flag stalk triangular. The pods are oblong, the petals are leathery, they crack at maturity, and the seeds are oval.

Adzuki bean:

Adzuki bean is an annual semi-twining herb of cowpea in Leguminosae. It is native to tropical Asia, and also cultivated in Korea, Japan, the Philippines and other Southeast Asian countries. Its stem is slender, pinnate compound leaves have 3 leaflets, the leaflets are papery, ovate or lanceolate, the base is broadly wedge-shaped or obtuse, the whole or slightly 3-lobed, the raceme is axillary, with 2-3 flowers and the bracts are lanceolate; The pedicel is short, with yellow flowers, about1.8cm long and1.2cm wide. The pod is linear and cylindrical, with 6~ 10 seeds, long oval, usually dark red, and the hilum is sunken. The flowering period is May to August.