The identifying characteristics of eight weed seeds of Bidens L. in compositae were described in this paper. These genera are B. pilosa, B. bipinnata, B. parviflora, B. biternata, B. frondosa, B. cernua, B. maximowicziana and B. tripartite.

• 杂草种子的识别特征进行了描述。 这 8种鬼针草为 :三叶鬼针草 (B .；pilosa)、鬼针草 (B