Definitions

1. noun

A perennial weed with a square stem and a square or four-sided leafy crown, that has a notch or groove in the leaf; a plant of the genus Polygonum, especially P. arenastrum or P. persicaria.

“Notchweed is an invasive species that can be difficult to eradicate from gardens.”

2. noun

A plant of the genus Polygonum that grows in wet places and has four-angled stems and leaves.

“The notchweed is a common sight in the wetlands near the river.”