Abstract: In Beijing mountainous area, there are 1166 species of vascular bundle plants, belonging to 122 families and 503 genera, among which, there are 62 species of fern plants, belonging to 17 families and 26 genera, 7 species of gymnosperm, belonging to 3 families and 7 genera, 863 species of dicotyledon, belonging to 88 families and 371 genera, and 234 species of monocotyledon, belonging to 14 families and 99 genera. The statistics of dominant families and genera showed that the species fastened on several cosmopolitan families, such as composite and rose, and on the other hand, distributed to single-species or few-species family. There are 1 single-species family and 6 single-genus families in Beijing mountainous area, and 72 single-species and few-species genera are found in the area, including 31 single-species genera. In all 477 genera, there are 264 genera of seed plants belonging to temperate distribution, accounting for 55.34%. The second is pan-tropic distribution type, including 60 genera and accounting for 12.43%, and endemic China distribution type only has 11 genera, occupying 2.31% of the total.

Key words: Forest soil seed bank, Natural regeneration, Temporal and spatial pattern