Canada Thistle

Distinguishing features:
(information taken from "Weeds of the West," Revised, 1992)

Colony forming periennial with deep and extensive horizontal roots.
Stems are ridged and 1 to 4 feet tall.
Leaves are alternate, oblong shaped, dividing into spiny-tipped irregular lobes.
Flowers purple to pink (ocassionally white) with heads 1/2 to 3/4 inch in diameter and have spineless bracts. Flowers appear in late summer.
Seeds are 1/8 inch long, flat and brown with tuft of hairs at the top.

Handbook HOME	Hoary Cress	Leafy Spurge	Musk Thistle	Puncturevine	Russian Knapweed
Saltcedar	Scotch Thistle	Sp. Knapweed	Tall Whitetop	Y. Starthistle	HOME


	Canada Thistle Alias: Cirsium arvense Distinguishing features: (information taken from "Weeds of the West," Revised, 1992) Colony forming periennial with deep and extensive horizontal roots. Stems are ridged and 1 to 4 feet tall. Leaves are alternate, oblong shaped, dividing into spiny-tipped irregular lobes. Flowers purple to pink (ocassionally white) with heads 1/2 to 3/4 inch in diameter and have spineless bracts. Flowers appear in late summer. Seeds are 1/8 inch long, flat and brown with tuft of hairs at the top.
	see also: Control Methods for Canada Thistle go to *University of Nevada Cooperative Extension Web Site* *Natural Resources: Weed Wanted Posters,* click *Canada Thistle*