Salicicola Gallery

Centaurea nigra L.

2 of 3

black knapweed

July 24, Arnold Arboretum, Jamaica Plain, Boston

Apical appendage of involucral bracts taller than 2 mm; involucre about as wide as tall; outer flowers in the head not enlarged.

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IndID PHID=20150724samsu3999 GPS = 42.29898-71.11916
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