After this time, it will turn black and fall off, because after this time, the rainy season in Huangshan is coming. Bitter bamboo flowers are black when they are picked in rainy days, and they fall off after a long rain.
The tender leaves, seedlings and roots of this plant can be used as medicine, and they can be picked in summer and autumn, fresh or dried.
Origin: Jiangsu, Anhui, Zhejiang, Fujian, Hunan, Hubei, Sichuan, Guizhou and Yunnan. Rhizome (bitter bamboo root), seedling (bitter bamboo shoot), stem bark (bitter bamboo shavings), juice after stem baking (bitter bamboo juice) and dead young bamboo stems (fairy sticks) are also used as medicine.