They are perennial plant that grows in the sunny copse of mountain districts and hills (perennial plant takes several years to grow). As the number of mountain districts are decreasing, so are they, thus they are one of rare orchids that we can see at Mt. Takao. They bear brilliant yellow flowers and this is why they are named ‘Cephalanthera falcata’. The flower is 1 to 1.5 cm in diameter. 3 to 12 flowers bloom a bit upward at the top of stalk. Few of flowers are fully open while most of them are half-open. The flower petal and calyx are almost same in color. The bottommost flower petal is tubulous at the root and inside has 5 to 7 dark brown projections called ‘ridge’. The leaf looks like bamboo grass, is about 8 to 15 cm long and 2 to 4.5 cm wide, has longitudinal wrinkles, and grows alternate as if they are wrapping the stalk. The underground stem spreads deep inside of the ground.

●Season　　Late April to about Late May
●Height　　about 30 to 60 cm
●Place　　Ura-Takao,Oku-Takao