Robert W. Freckmann Herbarium

Onagraceae: Evening-primrose

Flowers that usually bloom before noon. Usually 4 petals, 4 sepals, and 4 or 8 stamens (except Circaea with parts in 2's). The center of the flower, the stigma, often forms a characteristic cross. Leaves simple.
Sort by: Traits or Genus
Flower Formula:  Sepals 2 or 4; Petals 2 or 4 Glossary

Genus 
(Click for Taxon List)
WI Taxa
(map link)
Photo Genus Traits Google Searches
Calylophus
1 Photo of Calylophus Yellow to whitish flowers. Sepal falling after blooming. Seeds with no hairs. Stigma shield-shaped. Images   Information
Circaea
enchanter's-nightshade
3 Photo of Circaea White, tiny, 2 petaled flowers. Leaves opposite. Images   Information
Epilobium
fireweed, willow-herb
11 Photo of Epilobium White, pink, or purple flowers with 4 petals. Seeds with tufts of hairs Images   Information
Gaura
bee-blossom
4 Photo of Gaura White to pink flowers with all 4 petals coming from 1 side of blossom. Images   Information
Ludwigia
false-loosestrife, seed-box
3 Photo of Ludwigia Yellow, grren or no petals. Sepals staying on seed. Images   Information
Oenothera
evening-primrose, sundrops
13 Photo of Oenothera Yellow to whitish flowers with 4 petals. Sepal falling after blooming. Seeds with no hairs. Stigma with 4 cuts. Leaves alternate Images   Information


         
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