noun
- A common weed with small leaves and jointed stems, found in temperate regions.
Usage: Also called doorweed or prostrate knotweed; Scientific name: Polygonum aviculare
Examples
- The garden was overrun with knotgrass after the rainy season.
- Knotgrass spreads quickly across bare patches of soil.
- Farmers often struggle to remove knotgrass from their fields.
- The small pink flowers of knotgrass bloom in late summer.
- Knotgrass is considered a nuisance weed in many regions.