Canada Thistle (Cirsium arvense)

ct01.jpg

Division - Magnoliaphyta
Class - Magnoliopsida
Subclass - Asteridae
Order - Asterales
Family - Asteraceae
Genus - Cirsium


ct02.jpg

Canada thistle can be differentiated from musk and bull thistle by the fact that it has no spiny bracts or spines on the stems. In appearance, it falls between bull thistle and a centaurea. Its spineless bracted flower-head resembles that of a centaurea.

ct03.jpg

ct04.jpg

ct05.jpg

ct06.jpg

ct07.jpg

ct08.jpg

ct09.jpg

ct10.jpg

ct11.jpg





Weeds
Taxonomic List
List by Scientific Name
List by Common Name