By applying flowering phenology indicators,observation,statistics and analysis of flowering phenology of Rhododendron polylepis distributed in West China Subalpine Botanical Garden were conducted in 2014 and 2015,respectively. The flowering period of R. polylepis is in the first ten days in April to early May,and flowering duration period of species,individual,single flower level is 24-25 d,22 d,13- 15 d and 7- 9 d,respectively. Single flowering processes,according to their flowering shape and pollinating c...