Land Plants - invasive

Spotted Knapweed (Centauria stoebe ssp. micranthos) on Aug 10, 2020

Submitter does not have a specimen
EDRR Status: Local expert notified

Description of specimen

Pretty sure this is spotted knapweed. ~ 5 plants in 1 clump on upper part of gravel bar. Observed on July 21. Sorry for the late post!
knapweed flower Extent of infestation plant