Weeds: Canada thistle – Cirsium arvense
Weeds: Canada thistle – Cirsium arvense Categories: Broadleaf C-E Weeds Last review date: 2026-06-07 03:30 Scientific name: Cirsium arvense Family: Asteraceae (Compositae) Cycle: Perennial Plant type: Broadleaf Canada thistle leaves and flower Photo by: T.W. Miller Biology Canada thistle is an aggressive, spreading weed. The aboveground portions of the plants die back in the winter, […]