Abstract: Epiphytic bryophytes, sensitive to the environment change, are a good biological indicator of environmental pollution, climate change and forest health. Studying the diversity and host specificity of epiphytic bryophyte has fundamental significance. Field investigations were carried out on 213 individual trees belonging to 37 species from 21 sites in Hangzhou. There were 48 species of epiphytic bryophytes, and Cinnamomum camphora, Pterocarya stenoptera, and Liquidambar formosana were the most common host trees. DCA ordination showed that the correlation between epiphytic bryophytes and tree species was not significant, and the diversity of epiphytic bryophytes affiliated with each tree was significantly different. Only one moss, Sematophyllum phoeniceum showed significant association with the host, C. camphora. There were certain correlations between Schwetschkea courtoisii and P. stenoptera, and between Entodon challengeri and Diospyros kaki. Other epiphytic bryophytes and tree species are randomly distributed, showing low host specificity.

Key words: Bacillus, microflora.,  , plant growth promoting