knotgrass
/ˈnɒtgrɑːs/noun
mass noun
1- a common Eurasian plant of the dock family, with jointed creeping stems and small pink flowers. It is a serious weed in some areas.扁蓄, 两耳草。
1.1
- Genus Polygonum, family Polygonaceae: several species, in particular P. aviculare.蓼属, 蓼科：数种, 尤指萹蓄。
1.2
- any of a number of other plants, especially grasses, with jointed stems（尤指禾草）茎节膨大的植物。