Wolf’s Evening Primrose

Wolfs-evening-primrose_ODA_460.jpg
Photo Credit: Oregon Department of Agriculture

Overview

  • Species Common Name Wolf's Evening Primrose
  • Species Scientific Name Oenothera wolfii
  • Federal Listing Status Species of Concern
  • State Listing Status Threatened

Ecoregions

Special needs

Wolf's evening primrose is found on patches of Cenozoic-era marine deposits that are well-drained but have adequate moisture. Habitat types include grasslands, coastal strand, roadsides, and coastal bluffs.

Limiting factors

Due to narrow habitat requirements, Wolf's evening primrose has a disjunct distribution. Hybridization with garden evening-primrose (Oenothera glazioviana), a closely-related non-native ornamental plant, poses a serious threat to the genetic integrity of Wolf's evening primrose. Habitat loss due to urban development, road construction, and herbicide use has also negatively impacted this species.

Conservation actions

Avoid herbicide application and roadside/park maintenance activities during the growing season. Conduct public outreach about the problems caused by garden evening-primrose in areas where hybridization occurs.

Key reference or plan

Oregon Department of Agriculture Plant Conservation