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黄顶菊是近年来新发现的一种外来植物,为一年生草本,原产于南美洲。是我国禁止进境检疫性有害生物,2001年首次在河北衡水湖发现,目前呈现以河北省中南部为中心向周边其他省市扩散趋势。黄顶菊给其入侵地生态系统造成了严重危害,被称为“生态杀手”。一、形态特征一年生草本,株高25—200厘米,直立,开黄花。叶交互对生,亮绿色,披针状椭圆形,有锯齿或刺状锯齿;花序头状密集成蝎尾状伞形花序,总
Flaveria bidentis is a newly discovered exotic plant in recent years, an annual herb, native to South America. Is China’s ban on the entry of quarantine pests, found for the first time in 2001 in Hengshui Lake, Hebei Province, currently presents the central and southern Hebei Province as the center to other neighboring provinces and cities to spread the trend. Flaveria dahurica has caused serious damage to its invaded ecosystems, known as “ecological killer ”. First, the morphological characteristics of annual herbs, plant height 25-200 cm, upright, open yellow flower. Leaves alternate, greenish, lanceolate-elliptic, serrate or thorn-shaped serrate; inflorescences head densely into a crescent-shaped umbel, total