lesser knapweed, black knapweed, hardheads, Centaurea nigra(noun)
a weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized
The numerical value of black knapweed in Chaldean Numerology is: 2
The numerical value of black knapweed in Pythagorean Numerology is: 9
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"black knapweed." Definitions.net. STANDS4 LLC, 2017. Web. 24 Jun 2017. <http://www.definitions.net/definition/black knapweed>.