Delaware Wildflowers
Centaurea stoebe
L.
subsp.
micranthos
(Gmelin ex Gugler) Hayek, Repert
(
Centaurea maculosa
,
Centaurea biebersteinii
)
Spotted Knapweed
Asteraceae
— Aster family
Invasive non-native
September 2001
Delaware Wildflowers
