Common Burdock
Arctium minus

Family: Sunflower (Asteraceae)
AKA: Lesser Burrdock, Burweed
Photo taken on: July 28, 2004
Location: Morrow Point Trail, GV, CO
Life Zones: Plains to foothills
Habitat: Roadsides, waste places, ditches

 Grows bushy to 6 feet tall. Leaves on the stem are oval-shaped, dull green above, greyish green underneath. Flowers grow in clusters at the end of side branches. Flower heads are thistle-like and up to 1 inch across with narrow, hooked bracts.

Photo taken on: July 10, 2020
Location: Abiquiu, NM

In the first year only a rosette of large basal leaves is grown. Leaves are heart-shaped and can be 18 inches wide and 24 inches long with wavy edges. They have long hollow stalks and resemble rhubarb leaves. In the second year it grows a stout, ridged flower stalk with smaller leaves. A European escapee.

Flora of North America reference.

NOXIOUS