| Common Name: | Canada thistle |
| Family: | Asteraceae |
| Genus: | Cirsium |
| Species: | arvense |
| Classification/Rank: | Very Invasive |
| Method of Transportation: | A single seedling can produce a large patch through vegetative propagation |
| Habitat/Range: | Mesic to dry roadsides, fields and disturbed areas in the lowland, steppe and montane zones |
• biennial herb that grows 0.3 to 2.0 m tall • stems are erect, branched, and hairy •leaves are irregularly toothed, alternate, lance shaped on the lower stem becoming broader upwards, spiny toothed, smooth and green above, densely white hairy below • flowers are pink-purple
The NWIPC is seeking a quaified individual to assume the responsibilities of the NWIPC Field Operarions Coordinator. Click "Field...
Land owners and managers have long recognized the need to control invasive plants to limit their impacts. In May 2018, a new smartphone app...
