plant micromolecular systematics 基本例句 植物形态学 According to the distribution of alkaloids of 6 types and plant morphology, the relationships among sections in the genus Stephania were discussed in the paper.根据千金藤属植物中所含各种化学结构类型生物碱的分布，结合植物形态学，探讨了属内各类群之间的异同和亲缘关系。