Oenothera perennis is a species of flowering plant in the family Onagraceae and is native to the eastern United States and Canada.[1][2] Its common names include little evening primrose,[3]small sundrops,[4] and small evening primrose. Its native habitats include shaly slopes, moist or dry fields, pastures and roadsides. Oenothera perennis is a perennial herb.[5] It has yellow flowers that open during the day and close at night. Each flower has four petals that are notched at the tip with veins radiating from the base.[6]
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