The leaves are oblong or ovoid, about 3 to 5 cm long, about 1 to 2 cm wide, entire.
The leaves of Holland bean have 4 to 6 leaflets, which are heart-shaped, the lower edge of the leaves has fine teeth, the leaflets are oval, 2 to 5 cm long, 1 to 2.5 cm wide, and the whole.
Sweet bean flowers are solitary or 1 to 3 arranged in a racemose axillary shape. The Corolla is white or purplish red.
Dutch bean flowers are white or purple red, solitary or 1 to 3 arranged in racemes.
The pods of sweet beans are long and oval, about 5 to 10 cm long. There is a paper liner inside the pods. The seeds are round, generally 2 to 10, green.
The pods of Holland bean are long oval or oblate. The seeds are round, cylindrical, oval or oblate. There are 2 to 10 seeds in each pod, most of them are green.
