衡阳市城郊植物区系初探

A Preliminary Study on Plant Flora in Outskirts of Hengyang City

通过标准地调查及多年零星观察记载,结果表明:衡阳城郊现有各类516种(含变种),隶属78科,195属,其中木本植物237种,草本植物279种;其区系的热带性与温带性均各占总属数的50.7%(99属)、41.0%(80属),具有明显的热带-温带过渡特征;东亚、中国特有种及外来物种是是衡阳城郊植物多样性重要成分;乡土树种的区系成分主要以华戛(中国)广布、中国-日本分布、东亚分布和华东-华中分布四种类型为主.

By the ways of criterion- land research and the day- to- day observation,the survey showes that there are 516 plants （including variety） in all greenland at the outskirts of Hengyang city, of which belong to 78 families and 195 genera, among them 237 are woody plants and 279 are herb plants;genera of tropical and temperate clements of their flora have 50. 7% （99 genera）and 41.0% （80 genera） respectively, so their flora of the subtropical area there are of characteristics with transition of tropical and temperate zone;their many clement of Eastern- Asia and Endemic in China and the plant alien species are the great ingredients of plant diversity; and flora components of their indigenous tree species are mainly made of 4 kinds of distribution with China, China - Japan, Eastern - Asia, East of China and central China.