Analysis on the Components of Seed Plants Flora in Xiaozhaizigou Natural Reserve

Based on investigation and statistical analyses,the flora of seed plants of Xiaozhaizigou Natural Reserve has studied in the present paper.There are 1 558 species seed plants belonging to 621 genera in 137 families in the natural reserve.Based on the statistics,the results are as follow:(1)It is richer in number of seed plants with 26 species(belonging to 14 genera in 7 families)of gymnosperms;1 532 species(belonging to 607 genera in 130 families)of dicotyledon.(2)There are 15 areal types of genera of seed plants.It has 64.74% of various temperate distribution types and 31.02% of tropical elements.(3)There are larger proportion of archaic,relic and primitive plants in the natural reserve.