Definition of Kneiffia
in some classifications
: a genus of North American day-blooming herbs (family Onagraceae) having stamens of unequal length and a 4-angled ovary and often included in Oenothera — compare sundrops
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Origin and Etymology of kneiffia
New Latin, from F. G. Kneiff †1832 German physician and botanist + New Latin -ia
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