Sexton Mountain mariposa lily – State Wildlife Action Plan

Photo Credit: Oregon Department of Agriculture

Sexton Mountain mariposa lily is a bulbous perennial with a stout stem and a single basal leaf 2-2.5 dm long. The 2-2.5 cm bulb is ovoid, with a thick, dark coat. Flowers are bright lavender, with hairs in only a small area at the base of the petals above the gland. The two to four flowers are arranged in one or two loose umbels. Sepals are broadly lance-shaped, slightly shorter than the petals, and lack distinctive coloring. The 1.5-2 cm seed capsule is nodding at maturity.

Overview

Species Common Name Sexton Mountain mariposa lily
Species Scientific Name Calochortus indecorus
State Listing Status Endangered

Ecoregions

Klamath Mountains

The Klamath Mountains ecoregion covers much of southwestern Oregon, including the Klamath Mountains, Siskiyou Mountains, the interior valleys and foothills between these and the Cascade Range, and the Rogue and Umpqua river valleys. Several popular and scenic rivers run through the ecoregion, including the Umpqua, Rogue, Illinois, and Applegate rivers. Historically, this ecoregion is known …

Special needs

The Sexton Mountain mariposa lily was previously recorded growing in moist, rocky serpentine soils. The species may now be extinct.

Limiting factors

Over-collection, grazing, road construction, and agricultural development may have impacted this species.

Data gaps

Conduct surveys to determine whether or not this species has been extirpated. Perform a taxonomic review of this species.

Conservation actions

If populations are located, determine conservation actions needed to maintain them.