Flora of Seed Plants in Nanchangshan Island

There are 482 species belonging to 80 families and 286 genera, and two varieties are newly found. The flora is complex in geographical elements, with 15 types of 286 genera and 14 types of 482 species. Based on analyzing the geographical elements of the flora, the species of plants were rich and the temperate elements were obviously dominant. The proportion of tropical elements was higher. The flora was diverse in distribution types and complex in geographical elements.The characters that the flora connects widely with others were advented. The flora had a certain old origin and a certain low in endemicity with a good number of monospecific genus. At the species level, the East Asia was dominant. The Endemic to china phenomenon was obvious. The relationship between Shandong Peninsula and Liaodong Peninsula, Nanchangshan island and Shandong peninsula was highly consistent. There were some differences with the Liaodong Peninsula. The life-form composition on species was that Ghanerophytes, Hemicrytophytes and Therophytes was doninant. Cryptophytes and Chamaephytes accounted for the less.