Peacock Larkspur – Oregon Conservation Strategy

Photo Credit: Oregon Department of Agriculture

Overview

Species Common Name Peacock Larkspur
Species Scientific Name Delphinium pavonaceum
Federal Listing Status Species of Concern
State Listing Status Endangered

Ecoregions

Willamette Valley

The Willamette Valley ecoregion is bounded on the west by the Coast Range and on the east by the Cascade Range. This long mostly level alluvial plain has some scattered areas of low basalt, and contrasts with productive farmland and large urban areas. It has the fastest-growing human population in the state resulting in challenges due to land-use changes.

Special needs

Peacock larkspur is found in slightly higher and drier microhabitats within wet prairies and shady edges of Oregon ash and Oregon oak woodlands.

Limiting factors

This species is endemic to the Willamette Valley. The primary threats to Peacock larkspur include habitat loss, habitat degradation due to fire suppression, and competition from invasive plants. Overspray of herbicides may also impact this species.

Data gaps

Conduct reproductive biology and pollinator studies. Investigate hybridization. Determine germination requirements. Develop propagation and transplanting protocols.

Conservation actions

Maintain or restore grass-dominated habitat. Maintain or restore hydrology. Control key invasive plants. Use mowing or prescribed fire to control brush and trees. Maintain populations in roadsides and ditches. Collect and store seeds.

Key reference or plan

Oregon Department of Agriculture Plant Conservation