Analysis on causes of decrease of Hemsleya zhejiangensis population.

Hemsleya zhejiangensis (Cucurbitaceae) is an endemic climbing species in Zhejiang Province. Investigations on population of H. zhejiangensis in Wuyanling National Nature Reserve of Zhejiang showed that H. zhejiangensis is a dioecious plant with small flowers and short stamens, making difficult for insect and wind pollination. The result also demonstrated that the first place of finding H. zhejiangensis was in a bamboo grove with limited sunshine and humus, rhizomes and root of bamboos made grid of soil. The factors above-mentioned would be the causes of decrease of H. zhejiangensis population.