Centaurea diffusa, also known as diffuse knapweed, white knapweed or tumble knapweed, is a member of the genus Centaurea in the family Asteraceae. This species is common throughout western North …

Species Profile: Diffuse Knapweed. Reduces agricultural yields and forage values; crowds out native species (Winston et al. 2012)

Diffuse knapweed grows in a variety of habitats in Washington including river shores, rangeland and pastures. It also thrives in disturbed habitats such as gravel pits, roadsides, railroad tracks, vacant …

Diffuse knapweed can grow 1 to 3 feet tall and is diffusely branched above ground. This gives the plant a ball-shaped appearance and tumble-weed mobility when broken off.

Centaurea diffusa (diffuse knapweed) is usually a biennial plant (family Asteraceae) that forms dense infestations. Seeds disperse when stems break off and tumble in the wind.

Diffuse knapweed (Centaurea diffusa) is a short-lived perennial, a biennial, or occasionally an annual. It reproduces and spreads from seed. The plant develops a single shoot (stem), 1 to 2 feet tall or more, …

Diffuse knapweed is known as Centaurea diffusa and it is in the aster (daisy) family. Other common names include white knapweed, tumble knapweed and spreading knapweed. It is native to …

Diffuse knapweed is a biennial thistle that can mature and flower at a wide variety of heights - anywhere from a few inches to a few feet tall. First-year plants stay low to the ground with a “rosette” of deeply …

Short-lived perennial, annual, or monocarpic perennial knapweed with a long fibrous taproot and single upright stem covered in fine hairs. Plants form dense colonies and readily reproduce by seeds, which …

Diffuse knapweed is a pioneer species that can quickly invade disturbed and undisturbed grassland, shrubland, and riparian communities. Once established, diffuse knapweed outcompetes and reduces …