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(Plants) any plant of the large taxonomically complicated American genus Oenothera, typically having yellow flowers that open in the evening: family Onagraceae. See evening primrose
[C20: from Greek oinothēras, ?from onothēras a plant whose roots smell of wine]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Noun1.oenothera - chiefly North American herbs with usually nocturnal flowersOenothera - chiefly North American herbs with usually nocturnal flowers
dicot genus, magnoliopsid genus - genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination
evening-primrose family, family Onagraceae, Onagraceae - a large and widely distributed family of plants of the order Myrtales
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