Size: 2.0 - 2.5 inches wingspan
Key ID features: White/gray/translucent wings with red spots on the HW, and often with additional red patches bordered with black on FW. Antennae are boldly black/white striped. Similar pattern below, with medial red spots having pink centers.
Similar species: Clodius Parnassian (Parnassius clodius), which is larger, usually has solid black antennae
Host plant: Stonecrops including Sedum obtusatum, S. lanceolatum
Habitat: Primarily rocky outcroppings above 2500' elevation.
Range: Siskiyou Mtns, Aldrich, Blue and Wallowa Mtns
Season: Late June to late August.
Abundance: Locally common
Conservation Status: Secure