Spanish-button

Spanish button

noun
Dictionary.com Unabridged

knapweed

[nap-weed]
noun
any composite plant of the genus Centaurea, especially the weedy C. nigra, having rose-purple flowers set on a dark-colored, knoblike bract.
Also called hardheads, Spanish button.


Origin:
1400–50; late Middle English knopwed. See knop, weed1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
knapweed (ˈnæpˌwiːd)
 
n
centaury See also hardheads any of several plants of the genus Centaurea, having purplish thistle-like flowers: family Asteraceae (composites)
 
[C15 knopwed; see knop, weed1]

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