Boloria is a brush-footed butterfly (Nymphalidae) genus. Clossiana is usually included with it nowadays, though some authors still consider it distinct and it seems to warrant recognition as a subgenus at least.
Boloria
Pearl-bordered fritillary
The pearl-bordered fritillary is a butterfly of the family Nymphalidae found in Europe and through Russia across the Palearctic to the north of Kazakhstan.
Image: Pearl bordered fritillary
Image: Pearl bordered fritillary (Boloria euphrosyne) underside Geiranger
Dorsal side
Ventral side