Knotgrass
Polygonum aviculare
Polygonum aviculare
Importance
Found in spring cereals and well spaced vegetable crops.
1. The cotyledons are narrow and long, borne on a short reddish stem.
2. This is an annual and the older plant has long leaves and a prostrate wiry growth habit.
3. The first true leaf is broad at the base, long and lance-shaped.