Investigation of Nature Resources of the Genus Rhododendron in the Qionglai Mountains

The genus Rhododendron resources were rich in the Qionglai mountains. investigations were made of species, habitats and concrete distribution of rhododendrons by conducting surveys, collecting samples and photos. A total of 63 species belonging to 3 subgenus, 4 sections and 11 subsections were observed and the altitudes ranged from 1 230 m to 4 179 m. Most rhododendron species grew together in their typical habitats whereas a few species occurred fragmentally. In this study, plenty of specimens, and photos which could show characters of rhododendrons were collected to provide basic materials for further researches.