The bean has straight and upright, with stems strong and angular up to 1.6 meters high. It shows alternating, paripinnate and composite leaves, with broad leaflets of oval-rounded form, dark green color, without tendrils; The terminal leaflet does not exist or becomes a rudimentary tendril.

The flowers appear in clusters of 2 to 8, axillaries which are fragrant and large, reaching 4 cm, with white petals stained with violet, purple or black. They are hermaphrodites, and the plant is capable of self-pollinating. It should be noted that natural cross-fertilization is scarce, except in the presence of bees.