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Plains Yellow Primrose

Oenothera serrulata

Also called Serrate Leaved Evening Primrose, Tooth Leaved Primrose, Toothed Primrose, Toothed Evening Primrose, Half Shrub Calylophus, Half Shrub Sundrop, Shrubby Evening Primrose

Plains Yellow Primrose
Photo: NPS Photo by Jim Pisarowicz, Public domain
Family
Onagraceae (Evening-primrose family)
Grows as
Perennial
Native range
C. Canada to W. & C. U.S.A. and Mexico (Chihuahua)
Climate
temperate

About

Oenothera serrulata is a species of flowering plant in the Onagraceae known by the common name yellow sundrops. Other common names include halfshrub sundrop, serrate-leaved evening primrose, shrubby evening primrose, plains yellow primrose, and halfleaf sundrop. It is native to central North America, including central Canada and the central United States.

This plant is a subshrub that branches and forms a bushy clump up to 46 centimetres (18 inches) tall. The toothed leaves are up to 8.9 centimetres (3.5 inches) long. The yellow flowers bloom between March and November and have four petals. They open in the morning and close in the afternoon. They fade orange or pink with age. The fruit is a cylindrical capsule. It grows in dry, open plains and prairies.

Other Oenothera plants

Whitest evening primrose · California Evening Primrose · Evening Primrose · Common evening primrose · Tufted Evening Primrose · Woolly Beeblossom · Cleland's evening primrose · Crownleaf evening primrose · Velvetweed · Antioch Dunes evening primrose · Birdcage evening primrose · Oenothera dodgeniana

Text excerpted from the Wikipedia article Oenothera serrulata by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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