Rhaponticum repens   Russian knapweed, hardheads
           (Alt: Acroptilon repens, Centaurea repens )
Asteraceae (Alt: Compositae )
invasive                      herbaceous           
Distribution: Greenbelt

UW Burke Herbarium Link: Rhaponticum repens
USDA Plants Link: Rhaponticum repens   (ACRE3)