Scotch Thistle

Scotch Thistle (Onopordum acanthium L.)

Scotchthistle is a member of the Aster family, Thistle tribe. It is abiennial that was introduced from Europe or eastern Asia and can reach aheight of eight feet. Large, coarsely lobed, hairy leaves have avelvety-gray appearance. The rosette forms the first year and can haveleaves up to two feet long and a foot wide.

The spiny-edged, alternate leaves form leaf wings that extend downonto the stem. This branching plant has reddish-purple to violet flowersand a large, fleshy taproot. Seeds are about 3/16 inch long and tippedwith slender bristles.

It is found primarily along roadsides and railroads, but can becomean impassible obstacle to livestock on rangeland and pastures. It isincreasing in densities throughout Colorado.

In the Pueblo area a different species of Scotch thistle, Onopordumtauricum, is found. This species is bright green color and has no hairon the plant like the O.ancanthium species. Scotch thistle has been soldin Arizona as a native xeric species.

Scotch thistle Info/Fact Sheet (PDF) Click Here



Scotch for sale
Scotch farm

Scotch mechanical control

Dig up the Scotch rosettes before they get bigger and more widespread!

Big scotch rosettes