新疆种子植物属的区系地理成分分析

对新疆种子植物区系７３３属的地理成分进行了分析。结果表明，新疆种子植物区系地理成分多样，以温带成分和古地中海成分占优势，前者占总属数的５７％，３后者占３２．６％，３热带成分只占６．７％，华夏成分占３．８％，这表明新疆种子植物区系特征与本地区所处的气候带，地理位置及其地史变迁是一致的。在古地中海遗迹上发生的本土成分的植物区系组成的起重要作用，本植物区系是安加拉区系的一部分。

FLORISTIC ANALYSIS OF SEED PLANT GENERA IN XINJIANG

An analysis of the seed plant genera shows that the flora had a diverse geographical element, with an overwhelming number of temperate element accounting for 57%, it is indicats seed flora of Xinjiang is an integral part of Angala Flora. Local elements oringined from traces of Tethys occupy an important position accounting for 32.6%, Tropics element accounts for 6.7% and Cathaysian element accounts for 3.8%. This phenomenon is the result of the broad latitueles, diversified habitats and change of geological history.