a common weed with jointed stems (Polygonum aviculare)
; knotweed. [1913 Webster
" An infusion of Polygonum aviculare was once supposed to have the effect of stopping the growth of an animal, and hence it was called, as by Shakespeare, “hindering knotgrass.”"
"We want a boy extremely for this function,
Kept under for a year with milk and knotgrass."