cnidoscolus : Idioms & Phrases
cnidoscolus urens
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noun a stinging herb of tropical America
tread-softly; pica-pica; devil nettle; spurge nettle; Jatropha urens; Jatropha stimulosus.
WordNet
genus cnidoscolus
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noun a genus of perennial plant with bristles; belonging to the family Euphorbiaceae
Cnidoscolus.