Oenothera
noun
Oe·no·thera
| \ ˌēnəˈthirə, ēˈnäthərə\
Definition of Oenothera
: a genus of mostly North American annual or biennial herbs (family Onagraceae) having usually nocturnal yellow flowers with erect buds and terete seeds in two rows in a capsule — see evening primrose, kneiffia
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