polygonum
/pəˈlɪgənəm/noun
1- a plant of a genus that includes knotgrass and knotweed, some of which are weeds and some are garden ornamentals蓼属植物。
1.1
- Genus Polygonum, family Polygonaceae.蓼属, 蓼科。
词源
modern Latin, from Greek polu- 'many' + gonu 'knee, joint' (because of the swollen joints sheathed by stipules).