Oenothera triloba

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Oenothera triloba
Oenothera triloba.jpg
Scientific classification edit
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Onagraceae
Genus: Oenothera
O. triloba
Binomial name
Oenothera triloba

Oenothera triloba, with common names stemless evening primrose and sessile evening primrose[1] is a flowering plant in the primrose family. It is native to North America, where it is primarily found in northern Mexico and in the south-central United States.[2] It is found in dry, open areas such as glades, prairies, and sometimes even lawns. It appears to respond positively to soil disturbance.[3][4]

It is a winter annual that produces large yellow flowers in the spring. The flowers open near sunset.[3]


Among the Zuni people, the plant is used as an ingredient of "schumaakwe cakes" and used externally for rheumatism and swelling.[5] They also grind the roots and use them as food.[6]


  1. ^ USDA GRIN Taxonomy, retrieved 15 June 2016
  2. ^ "Oenothera triloba". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 17 January 2017.
  3. ^ a b Shinners and Mahler's Illustrated Flora of North Central Texas Online
  4. ^ "Flora of the Southern and Mid-Atlantic States".
  5. ^ Matilda Coxe Stevenson (1915). Ethnobotany of the Zuni Indians. SI-BAE Annual Report #30. p. 55.
  6. ^ Albert B. Reagan (1929). "Plants used by the White Mountain Apache Indians of Arizona". Wisconsin Archeologist. 8: 143–161.