长青自然保护区珍稀濒危保护植物研究

Ivestigation of the Rare and Endangered Plants in the Changqing Nature Reserve

长青自然保护区有珍稀濒危植物30种，占全省该类植物45种的66．7％，仅次于化龙山．其中，二级保护植物11种，三级的有19种．白辛树为秦岭分布新记录．相似性系数和区系特征显示出保护区内植物具有强烈的南北过渡特征和该区的特殊性．此外，保护区内还有省级保护植物16种，占该类植物的32％．

There are 30 rare and endangered plant species in the chancing NatureReserve,which account for 66.7% of the 45 species of the same hkinds listed by theauthorities of Shaanxi Province.11 species of them grade the second-class protection,and the rest the thild-class. The number of the species rank the second compared with thosein the Hualong reserve. The spotes, Pterostyrax Psillophylla,is found to be a new recordin Qinling mountain.The characteristics of the areal-type and the similarity coefficient betWeen different reserves indicate there is a special feature in the Changqing Reserve where both the northern and the outhem plant types grow together. In addtion, 16 speciesexcept the 30 are provincially protected plants. accounting for 32% of the total.