They are deciduous shrub that grow in bushes of mountain areas. As the shape of their leaves are similar to the ones of cucurbit. Then they are named. Cortex is tinged with gray color with many lenticels and young leaf is tinged with green color bearing short hairs. Their leaves are 10 to 20 cm long and grow alternative on the branch. Their edges are divided into 3 to 5 shallow with the sharp top. Their characteristics of leaves are thin, bearing sparse trichome on the surface as well as dense trichome at the back of it. Their blossom seasons are about May to June. They grow inflorescence (Kajo : stalk blooming flowers) from the root of the leaf to dangle white some flowers. The flower is about 3 to 3.5 cm long with 6 flower petals rolled backward strongly They have 12 male stamens and an anther which produces a female stamen is thin and long, and tinged with yellow, about cm long. The seeds are elliptically spherical shape, when matured they turn into indigo blue. The leaves turn into yellow in autumn.
●Height About 3 to 4 m
●Place Trail 2 and 3,Trail 5 and 6, Mt.Inari