Vigna angularis var. nipponensis("Yabutsuruazuki")
Japanese name: ヤブツルアズキ（薮蔓小豆） Scientific name:Vigna angularis var. nipponensis
[Overview]
A climbing annual found in sunny places such as grasslands.
The whole plant is covered with yellowish-brown hairs.
The vines grow to more than 3 m long.
Leaves are alternate and trifoliate; the leaflets are ovate, often shallowly 3-lobed, with pointed tips.
The terminal leaflet is about 3–10 cm long and 2–8 cm wide.
Stipules are present.
Short pseudoracemes in the leaf axils bear 2–10 yellow flowers.
The flowers have a characteristic shape, with a twisted keel petal overlapped by the wing petals.
The bracteoles are narrowly ovate and longer than the calyx.
The fruit is a hairless pod, linear, 4–9 cm long and about 0.4 cm wide, holding 6–14 seeds in a single row.
The seeds are elliptical and greenish brown to purplish brown.
