Umpqua Mariposa Lily

Photo Credit: Oregon Department of Agriculture


  • Species Common Name Umpqua Mariposa Lily
  • Species Scientific Name Calochortus umpquaensis
  • Federal Listing Status Species of Concern
  • State Listing Status Endangered


Special needs

The Umpqua mariposa lily occurs in grassland-forest ecotones on serpentine soils. This species can be found in a broad range of habitat types, from closed-canopy coniferous forests to open grass-forb meadows.

Limiting factors

The Umpqua mariposa lily is threatened by grazing, logging, nickel mining, road construction, herbicide drift from applications on adjoining private land, and invasive plants. Fire suppression leading to encroachment of woody vegetation adversely affects this species. Bulb digging by collectors poses an additional threat.

Conservation actions

Continue to implement the interagency Conservation Agreement. Manage grazing and logging in sensitive areas. Establish long-term monitoring. Collect/store seed from all populations. Survey for new populations.

Key reference or plan

Oregon Department of Agriculture Plant Conservation