关键词: 杜鹃花属, 合江, 变色

Abstract: Rhododendron is one of the largest flowering plant genus. There aremore than 840 species in ths woold, its main centre of distribution is inChina, containing about 258 species in Subgenus Hymenanthus, 200 specisin Subgenus Rhododendron and 98 species in Subgenera Azleastrum, Tsut-susi, Peutanthera……etc. that totaled 540 species make up more than 65%of the genus. Many plants with beautiful flowering are native this coun-try. Recantly, scientists have discovered that some traditional chinesemedicines can be extracted from seversl of species, while some species tooare edible to the Tibetans. This paper also deals with Subsection Argyrophylla, Irrorata, includ-ing the key to the species, new Subspecies, Variety, several new combin-ation and changes of status are made, including R. insigne var. hejiangense, R simiarum var. versicolor, R. tanastylum var。lingzhiense………etc.

Key words: Rhododendron, hejiangense, versicolor