Thistle, Canada

Regulated Act: Alberta Weed Control Act

Provincial Designation: Noxious

Colour: Purple

Latin Name: Cirsium arvense

Fact Sheet1: Click Here to View/Download PDF

A plant that is growing in the grass.

Canada Thistle

A field of grass with yellow flowers growing.

Canada Thistle

A field of purple flowers with brown stems.

Canada Thistle: Photo credit Nicole Kimmel

A close up of the leaves on a tree

Canada Thistle: Photo credit Nicole Kimmel

A small plant is growing in the dirt.

Canada thistle: Photo credit Nicole Kimmel

A purple flower with green leaves in the background.

Canada thistle: Photo credit Nicole Kimmel

A plant growing in the middle of a concrete path.

Canada thistle: Photo credit Nicole Kimmel

A white flower is in the middle of some grass

Canada thistle: Photo credit Nicole Kimmel

A close up of the flowers and buds on a plant.

Canada thistle: Photo credit Nicole Kimmel

A close up of some purple flowers on a plant

Canada thistle: Photo credit Qiting Chen City of Edmonton

A field of purple flowers with the name thistle, canada.