spanish-needles

Spanish needles

noun
1.
a composite plant, Bidens bipinnata, having achenes with downwardly barbed awns.
2.
the achenes themselves.

Origin:
1735–45, Americanism; in allusion to its tropical American origin

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
spanish needles

noun
1. the seed of bur marigolds 
2. common bur marigold of the eastern United States 
WordNet® 3.0, © 2006 by Princeton University.
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