polygonum(n = noun.plant) genus polygonum - diverse genus of herbs or woody subshrubs of north temperate regions;
is a kind of dicot genus, magnoliopsid genus
is a member of buckwheat family, family polygonaceae, polygonaceae
A genus of plants embracing a large number of species, including bistort, knotweed, smartweed, etc. [1913 Webster]
polygonum, n. any plant of the genus Polygonum, with small bell-shaped flowers. Also called KNOTGRASS, KNOTWEED.
Etymology:
mod.L f. Gk polugonon
genus polygonum, polygonum aubertii, polygonum fagopyrum, polygonum orientale