black knapweed black kite • black knot · · · Info · Definitions · Synonyms · Characters · · black knapweed · · Text Common · · Latin · · Scripts 14 · · Length 2 · · Syllables Definitions · · · (noun) a weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized. Synonyms: lesser knapweed, black knapweed, hardheads, Centaurea nigra. · · Noun Definition 1 Synonyms · · · lesser knapweed · · Synonym 1 hardheads · · Synonym 2 centaurea nigra · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 k latin small letter k U+006B l latin small letter l U+006C n latin small letter n U+006E p latin small letter p U+0070 w latin small letter w U+0077