White Rock Larkspur

Photo Credit: Oregon Department of Agriculture


  • Species Common Name White Rock Larkspur
  • Species Scientific Name Delphinium leucophaeum
  • Federal Listing Status Species of Concern
  • State Listing Status Endangered


Special needs

White rock larkspur occurs in well-drained areas within open lowland prairies, in dry roadside ditches, along river banks and bluffs, and in open areas atop basaltic shelves. This species prefers loose, shallow soils with high organic matter content.

Limiting factors

A key threat to white rock larkspur is habitat loss due to urban and agricultural development. Fire suppression and invasive vegetation encroachment in the understory can degrade remaining habitat. Herbicide use and other roadside maintenance activities can also harm this species. White rock larkspur persists in low numbers in small populations.

Conservation actions

Restore habitat using site-appropriate methods: control encroaching trees and shrubs and control key invasive plants.

Key reference or plan

Oregon Department of Agriculture Plant Conservation