SG Heritage Dictionary

Polygonum [\N] Webster's Dictionary 1828

1. POLYG'ONUM

2. POL'YGON, noun [Gr. many, and knee or knot.] Knotgrass, a genus of plants so names from the numerous joints in the stem.

Polygonum [Noun] Webster's Dictionary 1913

A genus of plants embracing a large number of species, including bistort, knotweed, smartweed, etc.