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Black Knapweed (Centaurea nigra)
Image ID: stv19Tap/mouseover and drag to zoom/pan.
Family: Asteraceae (Sunflower)
Height: 1 to 3 ft.
Blooms: July to September
Leaf Type: smooth
Bloom Size: 1 in. (typical)
Flower Description: Individual flowers, Parts indistinct
Location: Stavich Bicycle Trail
Notes: Dark, fringed bracts.
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We started out as wildflowers from the bicycle trails of western Pennsylvania, but we've grown!