| Sanming county is in the middle northwest of Fujian province, a famous garden county with abundant resources of urban plants. For the purpose of promoting the protection and sustainable utilization of urban plant diversity and applying national ecological garden county of Sanming county, the flora, ancient and famous trees, rare and endangered plants, resources of wild ornamental plant and resources of vertical greening plant were investigated and analyzed. Greenbelt types were classified and impact of extraneous plants on urban plant diversity was analyzed. The conservation planning of Sanming urban plant diversity was compiled. The scope of the research and planning was the built and surrounding area, 220 square kilometers.1,To know the species richness, dominant species, life type and geographical distribution in Sanming, the distribution and diversity of bryophytes, ferns and seed plants were surveyed. The results showed that a total of bryophytes in Sanming had 41 families, 60 genera, 73 species, ferns 29 families 44 genera, 64 species, and seed plants 136 families, 405 genera 762 species. Many species of them had important economic value and ecological value. Floristic composition analysis showed that: Panarctic component of bryophyte was dominant, but the dominant family was not obvious. Fern flora was affected heavily by the composition of tropical component with 30 genus, 68.18 percent of the total genus. The predominant component of seed plants flora belonged to the tropical distribution type, with 76 families, accounting for 55.88 percentage. The dominant families were Poaceae, Rosaceae, Asteraceae, Lauraceae, Fabaceae, Fagaceae, Euphorbiaceae, Theaceae, Moraceae, Rubiaceae, etc. Only 32 families of were temperate components, accounting for 23.59 percentage, meaning less affection in this area.2,The greenbelts in Sanming were classified into seven types: landscape forest, protection forest, parks greenbelt, courtyard greenbelt, residential greenbelt, street greenbelt, production greenbelt. K diversity index was introduced to analyze the species diversity of several greenbelts in Sanming. Results were as follows: The K value of production greenbelt was the highest, because of its intensive management, and it was followed by that of landscape forest. The K index of residential greenbelt, street greenbelt and courtyard greenbelt was lower, because a large number of exotic plants were introduced, with simple structure and poor uniformity of species distribution.3,There were 58 trunks of ancient and famous trees with age of over 100a, belonging to 10 families, 14 genera, 14 species in Sanming. 3 trunks of them were the 1st grade (Cinnamomum camphora, the oldest one about 800a in Chendunshuiwei), the other were the 2nd grade. Cinnamomum camphora were most with 25 trunks, and Ficus microcarpa took the second rank. The trees distributed manily on Chendun of Meilie subarea and Xinkou of Sanyuan subarea, accounting for 17% and 20 trunks of ancient and famous trees respectively. The second were Dayuan, Houyangshuiwei, Sanming restaurant.4,The number of exotic plant in Sanming was 125 species belonging to 55 families. The majority of them (115 species) were introduced as ornamental plants, some others as timber forest and economic plants. Some of the exotic plants had settled locally and fled to be the wild plants. The harming species were: Anredera cordifolia (which spread to the wild in Sanming, and even spread to landscape forest harmfully), Wedelia chinensis, Chenopodium ambrosioides, Alternanthera philoxeroides, Leucaena leucocephala, Lantana camara. Some of these exotic species were in long-term cultivation, and some were introduced recently. They settled in Sanming in the invasion progress, and some did a lot of harm to the local biodiversity.5,There were 12 species of national protecting rare and endangered wild plants in Sanming, belonging to 11 genera, 10 families. 1 species was ferns, 4 were species gymnosperms, and 7 species were angiosperms. 3 species were the 1st grade, 9 and species were the 2nd grade. In recent years, Hualing nursery and Xianrengu forest park which belonged to Garden Management Office of Sanming had transplanted some rare and endangered wild plants, and achieved tangible results.6,There were rich wild ornamental plants in Sanming, with the characteristics of abundant species, complex of the floristic composition and high ornamental value. 139 species were selected from the wild plants for their ornamental value, and were analyzed for their diversity characteristics, ornamental classification and application characteristics. The results could enrich the tourism resources and provide basic data of greening resources in Sanming.7,There were 93 vertical greening plant species belonging to 58 genera and 33 families in Sanming. The main climbing types of them were natural winding, clinging climbing and compound climbing. The vertical greening plants were classified into ornamental posture, ornamental leaves, ornamental flowers and ornamental fruits, mainly used in greening on house's walls, fence and balcony.8,Conservation planning of urban plant diversity in Sanming included a county center and four subarea, total area of 220 square kilometers. The planning accorded to "Law on Urban Planning of People's Republic of China", "Forestry Law", "Law on Environmental Protection of People's Republic of China " . The conservation way was protecting in the spot supplemented by transplanting conservation. The prior main conservation object were zonal vegetation, natural wetlands, rare and endangered wild plants, special scenic forest and ancient and famous trees. The planning aimed to build plant diversity monitoring system and near natural communities, to localize the greening plants. By improving of the existing nature reserve, establishing new protected areas and botanical gardens, a number of representative, typical ecosystems, rare and endangered plants, urban plant diversity and landscape with scientific value could be protected effectively and used continuously.
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