Floristic analysis of seed plants in Wenzhou Area, southeastern Zhejiang, China
XIONG Xianhua1,2, CHEN Xianxing3, HU Renyong3, ZHU Shengchao4, TAO Zhengming5, ZHOU Zhuang5, DING Bingyang3,6
1. Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. College of Life and Environmental Sciences, Wenzhou University, Wenzhou 325035, Zhejiang Province, China;
4. Wenzhou Vocational College of Science and Technology, Wenzhou 325006, Zhejiang Province, China;
5. Zhejiang Institute of Subtropical Crops, Wenzhou 325005, Zhejiang Province, China;
6. Zhejiang Forestry Academy, Hangzhou 310023, China
Abstract:Wenzhou area is situated in the south-east part of Zhejiang Province ranging from 27°03'N to 28°36'N in latitude and 119°37'E to 121°18'E in longitude. Owing to its unique geographical location as well as the special ecological environments, a variety of plant species are grown in Wenzhou area. In order to understand the spermatophyte diversity in Wenzhou, we have carried out botanical investigation, including fieldwork and specimen examination. Based on the investigation and research, a book named "Checklist of wild vascular plants in Wenzhou" was published. As a result, a total of 2 460 species (not including infraspecific taxa), which belong to 958 genera in 166 families, are naturally distributed in this area. And of them 2 435 species are considered to be angiosperm plants from 938 genera in 158 families and 25 species are known as gymnosperm plants from 20 genera and 8 families. The families containing 2-10 species and the genera including one species own the highest percentage accounting for 48.2% and 53.9% of total number of families and genera, respectively. The areal-type of genus can be divided into 14 types and 24 sub-types, while the tropic components are slightly more than the temperate ones (50.1% vs. 47.4%). At genus level, the pan-tropic type is the most and occupies 19.8%, followed by the north temperate type and the east Asia type respectively accounting for 17.0% and 13.2%. The major characteristics of spermatophyte flora in Wenzhou can be summed up in the following points:It is considerable rich in wild seed plants and the geographical components are multiform; Numerous relict, rare or endangered species in this district reveal the ancientry of its origin; Wenzhou is situated in the subtropical region where the compositions of eastern and southern Chinese flora converge; And, appropriate measures should be taken to control the invasive alien plants.
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