落叶松——杜鹃林是大兴安岭林区分布最普遍的林型,其立木以落叶松为主,常混有少量白桦,在北坡的西里尼西河以北的林分中,也常混有樟子松。其下木以兴安杜鹃为主,其次为东北赤杨,在大兴安岭北坡,后者的成份往往增大。地被甚发育,盖度90%左右,少有低于50%者,以耐荫草本为主,如越桔、红花鹿 Larch - Rhododendron forest is the most widely distributed in Daxinganling forest type of forest, its standing mainly larch, often mixed with a small amount of birch, in the northern slopes of the forest along the west of the Silignhe West also often mixed camphor Loose pine. The following wood to Xing An azalea, followed by Northeast Alder, the northern slopes of Daxinganling, the latter tends to increase the composition. The ground is very developed, coverage of about 90%, less than 50% less, with shade-based herbs, such as bilberry, saffron