Please click on the pictures to view them as a larger size.
Spotted knapweed is a biennial or short-lived perennial forb of the composite family.
It commonly grows to 3-4 feet in height. The alternate, pale leaves grow from 1-3 inches in length. Stem height varies from two feet on upland sites to four feet on wetter sites. The majority of stem growth occurs in June. The slender, hairy stems grow in an erect and branched arrangement.