There are 1064 species of seed plants in Longwantan National Forest Park, Zhejiang province, belonging to 528 genera of 129 families, among them, 12 species of gymnospermae, belonging to 10 genera of 5 families, 1052 species of angiosperm, belonging to 124 families and 518 genera. There are many families with 2-9 species, and the next one is the single-species family. Pantropic type occupies 22.2% and northern temperate type 17.7%. It is almost equivalent between tropic elements and temperate ones (49.3%/49.2%). The investigation demonstrated that Longwantan National Park is rich in plant species with diverse geographical components and an obviously transitional feature.%采用实地调查与文献资料相结合的方式，统计分析了浙江龙湾潭国家森林公园的种子植物区系。结果表明：该区共有种子植物129科，528属，1064种（包含种下分类群），其中裸子植物5科，10属，12种，被子植物124科，518属，1052种；从科级水平看，以2~9种的较小科最多，单种科次之，从种级水平看，10~19种的中等科最多，50种以上的大科次之；20种以上的大属仅有1属为悬钩子属21种，10~19种的有6属，在属级水平上，单种属最多，占61.4%，其次为2~5种的较小属；在种级水平上，较小属最多，占45.8%，其次为单种属；属的分布区类型以泛热带分布最多（22.2%），其次为北温带分布（17.7%），热带地理成分与温带地理成分相当。龙湾潭国家森林公园植物种类丰富，地理成分多样性高，过渡性质明显，区系性质不明显。
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