They are an annual plant that grows in the pool of the forests and at the grasslands in sunny mountain district. The stalk grows thickly downward paraphyllium and is thin and long to expand about 1 m to tangle in the other vegetation. We see them mostly in thicket, and then this is why they are named. The flower is about 2 cm long with the top being like a butterfly-shaped. The whitish edge of the flower petal is dark purple color and some are on inflorescence (Kajo: stalk blooming flowers) grown from the side of the leaf. Another characteristic is that except this flower, they have cleistogamous flower (Heisaka: the flower which does not blossom but pollinates itself) both on the ground and at the underground stem. The leaf consists of 3 as one and grows alternative. Lobules are wide egged-shaped about 3 to 6 cm long (Shoyo: each one that is leaf-shaped and leaf like one consisting of more than a few leaves) has paraphyllium to grow. When the flowers wither, they bear the hull-shaped seeds. When matured, the seeds are split half out to produce quail-egged shaped seedlings with black patterns.

●Season　　September to about October
●Height　　 – climbing plant
●Place　　Trail 1, Trail 4 to 6, Ura-Takao