rattle-snake weed

rattlesnake weed

noun
1.
a hawkweed, Hieracium venosum, of eastern North America, whose leaves and root are thought to possess medicinal properties.
2.
a carrotlike weed, Daucus pusillus, of southern and western North America.
3.
any of certain other plants, as an umbelliferous plant, Eryngium aquaticum.

Origin:
1750–60, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
rattlesnake weed

noun
a hawkweed with a rosette of purple-veined basal leaves; Canada to northern Georgia and Kentucky 
WordNet® 3.0, © 2006 by Princeton University.
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