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Because the flowers usually bloom at night, Ragged Evening Primrose is a fairly low and inconspicuous plant. These flowers are very similar in appearance to those of Oenothera biennis (Common Evening Primrose) and other species in this genus. It is primarily the pinnatifid shape of the leaves that sets Ragged Evening Primrose apart; they have conspicuous lateral lobes. The leaf-margins of other Oenothera spp. in Illinois are usually less wavy. Another common name of Oenothera laciniata is Cutleaf Evening Primrose.

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© John Hilty

Source: Illinois Wildflowers

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