Polygonum
WordNet
noun
(1) Diverse genus of herbs or woody subshrubs of north temperate regions
WiktionaryText
Etymology
New Latin, from Greek a kind of plant; many + the knee, a joint of a plant. So called in allusion to the numerous joints
Noun
polygonum
- : A genus of plants in the family Polygonaceae embracing a large number of species, including bistort, knotweed, smartweed, etc.