black knapweed   (TTS Sound)

The black_knapweed has 1 Senses.

• centaurea nigra, lesser knapweed, black knapweed, hardheads
• a weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized
• 硬い針金状の軸と紫色の花を持つ雑草の多年草