Scientific Name: Cirsium arvense L.
Growth Habit: Perennial, erect, up to 4 feet tall.
Leaves: Varies from light to dark green, oblong or lance shaped, deeply cut, spiny toothed margins (some may be smooth); slightly hairy below. Tremendous leaf variability.
Stem: Smooth to slightly hairy, branched at top.
Flower: Small bristly clusters, 3/8 to 5/8 inch in diameter, light lavender to deep rose purple. Plants are male or female.
Roots: Extensive, fleshy, creeping rootstocks.
Seeds: Smooth, light to dark brown, tipped by a cupped conical point, approx. 1/8 inch long.
Other: Reproduces by seed and creeping rootstocks.
Fremont County Weed Control Department
615 Macon Ave.
Room LL5
Cañon City, CO 81212
jr.phillips@fremontco.com
(719) 276-7317