conyza : Idioms & Phrases
conyza canadensis
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noun common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron
fleabane; horseweed; Erigeron canadensis; Canadian fleabane.
WordNet
genus conyza
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noun common American weed or wildflower
Conyza.