Canada Thistle
Cirsium arvense Aster Family
(c) Al Schneider
(c) Al Schneider

Growth Form: Herb

Flower Color: Purple

Leaf Arrangement: Alternate

Leaf/Leaflet Shape: Deeply lobed

Habitat Type: Pastures; Waste places

Ecological Management Units Where Present (by number): George Robert White Environmental Conservation Center (1), Successional Field (5), South Side (6)

Total Number of EMUs: 3

Status in Massachusetts: Introduced

Credits: Morola Adjibodou, the Boston Nature Center and the EFG Project at UMass Boston