Rosa praelucens Byhouwer is a critically risked plant endemic to Shangrila County of Yunnan. It is also a famous alpine flower. The distribution and population status of R. praelucens was comprehensively and systematically investigated. The current natural distribution was then mapped. The age structure,life table and survival curve based on the height and crown of every plant was analysed. The results were as the follows: Except for the 69 individuals introduced and grown by local nurseries and companies,R...