Status:  uncommon local resident

Flights:  1, May-late Aug

Distribution/known sites in Monterey County:  limited to coastal range uplands; Chew’s Ridge and Skinner Ridge

Habitats:  high mtn. meadows, slopes

Host plants: violets, incl. viola quercetorum

Adult foodCA buckeye, thistle

Conservation: ssp. atossa (Kern Co) extinct; other races very restricted range, S. a. clemencei only in coast ranges MCO and SLOCO


  1.   MCO race ‘clemence’s” fritillary S. a. clemencei lighter, approaching tawny

  2.   Santa Cruz CO race S. a. adiaste

  3.   fem. larger, paler; male with thickened black FW veins slightly more pronounced; MCO race: fem. pale-orange to buff above


Unsilvered fritillary Speyeria adiaste

Life history facts

egg: laid singly on fallen leaves and twigs near violets

larva: first stage hibernates unfed, feeds on violet leaves in spring