重庆市种子植物区系特征分析

对重庆市种子植物区系进行了研究,其区系特征如下:(1)植物种类和区系组成丰富,共分布有野生种子植物208科1 127属4 764种,其科包含12种分布型和13个变型,属包含15种分布型和23个变型;(2)科的区系组成以热带成分占主要,总共包含83科,达到重庆地区种子植物总科数的39.90%,这说明重庆种子植物区系带有一定的热带亲缘关系.属的区系组成以热带成分最多,达到454属,占重庆市种子植物总属数的40.28%,表明重庆地区种子植物区系的热带亲缘关系较强;(3)特有现象明显,虽然本地区分布的特有科属相对较少,但特有种丰富.

Characteristics of Seed Plant Flora in Chongqing, China

The features of seed plant flora in Chongqing City, China, are as follows: (1) wild plants are diverse in species (208 families, 1127 genera and 4764 species), and the floristic elements are copious, including 12 distribution types and 13 varieties in the families and 15 distribution types and 23 varieties in the genera. (2) The tropical taxa are predominant with 83 tropical families (39.90%) and 454 tropical genera (40.28%), indicating that Chongqing flora is relative to tropical one. (3) Although the endemic families and genera are scarce in Chongqing, the endemic species are rich.