Common name: Common Knapweed
Scientific name: Centaurea nigra 黑矢車菊
Genus: Centaurea 矢車菊屬
Family: Asteraceae or Compositae 菊科, aster , daisy, composite or sunflower family
Origin: native
Date: 18th July
Date: 18th July
still in flower buds?
involucral bracts without strong spines; apical portion of involucral bracts (black spider-like structures above) separted from basal portion (pale green part below the black spider-like structure) by distinct constriction (become narrower in the middle of the bract); apical portion of involucral bracts blackish, deeply and regularly toothed.
flowers purple
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