any composite plant of the genus Centaurea, especially the weedy C. nigra, having rose-purple flowers set on a dark-colored, knoblike bract.
Origin of knapweed
First recorded in 1400–50, knapweed
is from the late Middle English
Also called hardheads, Spanish button.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for knapweed
Historical Examples of knapweed
The seeds of brook-lime, flax, and knapweed the twite seems partial to, and this wild-weed field is to them a very paradise.
The moth is out in July and in August, and may often be seen resting on the flowers of knapweed (Centaurea) in the daytime.
The knapweed was stunted and the scabious blooms drooped towards the dusty pasture.
British Dictionary definitions for knapweed
any of several plants of the genus Centaurea, having purplish thistle-like flowers: family Asteraceae (composites)See also centaury (def. 2), hardheads
Word Origin for knapweed
C15 knopwed; see knop, weed 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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