Species:
Cirsium arvense
Common Name:
Canada thistle
Systems Affected (standardized):
cropland/pastureland, rangeland
Regions(s) present (updated by AB):
PH
Impacts:
Crowds out native species; reduces crop and forage yields
Source? likely to be reintroduced:
C. arvense has the potential to spread to new areas via contaminated crop seed, irrigation channels, or living organisms. There is very little chance that C. arvense will be spread deliberately as it is widely regarded as a pest in most temperate regions and has no value as an ornamental plant
Info Blurb:
Crowds out native species. Reduces crop and forage yields. Has the potential to spread to new areas via contaminated seed, irrigation channels, or living organisms.
Native Regions in OK:
NONE
Current and past designations:
OWL, WFHC
Present in OK?
Yes
Present in Bordering States?
TX, NM, CO, KS, MO
Has Legal Status in BS?
AR NW, CO List B, KS NW, NM Class A, MO NW