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Home  /  Plants  /  Budburst Species  /  Centaurea diffusa
Phenology Observation Sheet for Wildflowers and Herbs

COMMON NAME

Diffuse knapweed

SCIENTIFIC NAME

Centaurea diffusa

Plant family

Aster (Asteraceae)

Plant group

Wildflowers and Herbs

Diffuse knapweed has an urn-shaped flowerhead that can be white, pink, or lavender. Unlike other knapweeds, diffuse knapweed has terminal spines on the floral bracts.
3 reports
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OBSERVERS
3+
OBSERVATIONS
!

Identification hints

Diffuse knapweed has an urn-shaped flowerhead that can be white, pink, or lavender. Unlike other knapweeds, diffuse knapweed has terminal spines on the floral bracts.

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Did you know?

Diffuse knapweed plants start with just a basal rosette of leaves. These leaves grow throughout the first year and if they reach a critical growth stage, the plant will bolt the second year sometime around May. This plant flowers between July and September. The fruits can begin developing as early as August. After the plant has died (often after fruiting), the stems often break off and behave in a tumbleweed fashion, spreading seeds as they go.

DISTRIBUTION IN TH U.S.
Arizona , California , Colorado , Connecticut , Iowa , Idaho , Illinois , Indiana , Kentucky , Massachusetts , Michigan , Missouri , Montana , Nebraska , New Jersey , New Mexico , Nevada , Ohio , Oregon , Tennessee , Utah , Washington , Wisconsin , Wyoming
HABITAT
There is no information available about this species.

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