polygonum
noun
po·lyg·o·num
| \ pə-ˈli-gə-nəm
\
\
Definition of polygonum
: any of a genus (Polygonum) of herbs of the buckwheat family with a prominent tubular sheath around the base of each petiole, thickened nodes, and flowers that are solitary and axillary or in spiked racemes
— called also knotweed
Keep scrolling for more