Oenothera
noun
Oe·no·thera
ˌēnəˈthirə,
ēˈnäthərə
: 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
Word History
Etymology
New Latin, from Latin oenothera, onothera, a plant of the genus Epilobium, from Greek oinothēras, onothēras