- any plant of the large taxonomically complicated American genus Oenothera, typically having yellow flowers that open in the evening: family OnagraceaeSee evening primrose
C20: from Greek oinothēras, ?from onothēras a plant whose roots smell of wine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for oenothera
The European types of Oenothera biennis and O. muricata are in the same condition.
MacDougal also obtained a more or less distinct mutant of Oenothera biennis.
Oenothera biennis has been seen bearing flowers of three different colours.