万州区遭受入侵植物危害的种子植物区系特征分析

在对万州区入侵植物危害对象（种子植物）详细调查的基础上,对种子植物的生长型组成、科及属的分布区类型进行统计分析。结果表明,区内种子植物较丰富,共47科,184属,279种;生长型相对单一,以草本占优势;优势科、属明显;种子植物地理成分较复杂,吴征镒划分的中国种子植物属的15大分布类型分布有7种;区系特征具明显的温、热带混杂现象,温带分布科11科,占总科数的37.93%,温带分布属81属,占总属数的52.60%。

Analysis on Flora of Seed Plan Suffering Harm for Invasive Plants in Wanzhou

The growth-types and area-types of families,genera and species in the present flora of Wanzhou in Chongqing were analyzed.The results showed that the taxa of seed plants were abundant.It was now known that there were 279 species(including varieties and form) of seed plants,which belonged to 184 genera and 47 families.The growth-type was single.Herb was dominant.The dominant families and genera were prominent in Wanzhou.The geographical components were complex.The same as the distribution of seed plants genera compartmentalized by Wu Zhengyi in China.Its flora showed an obvious temperate zone character,involving 11 species accounting for 37.93% of the total and 81 genera accounting for 52.60% of the total.