evening primrose(redirected from night willow herb)
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Any of various plants of the family Onagraceae and especially the genus Oenothera of the Americas, having four-petaled usually yellow flowers that open in the evening and whose seeds yield an oil used in herbal medicine.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Plants) any onagraceous plant of the genus Oenothera, native to North America but widely cultivated and naturalized, typically having yellow flowers that open in the evening
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a plant, Oenothera biennis, having yellow flowers that open at nightfall.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||evening primrose - any of several plants of the family Onagraceae|
herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
evening-primrose family, family Onagraceae, Onagraceae - a large and widely distributed family of plants of the order Myrtales
enchanter's nightshade - any of several erect perennial rhizomatous herbs of the genus Circaea having white flowers that open at dawn; northern hemisphere
common evening primrose, German rampion, Oenothera biennis - a coarse biennial of eastern North America with yellow flowers that open in the evening; naturalized in Europe
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