Identifying features
Wingspan 23–29 mm. The male has dark blue-violet wing uppersides; the female has dark blue-violet wing uppersides with a broad dark band inside the wing margin. The wing undersides are grey with dark spots in white rings; the hindwing underside has only a few, 2–3 yellow-orange spots. At the wing base is a small, indistinct blue-green patch.
Similar species
No confused species are described in the examined sources.
Distribution
Throughout the eastern Norway region, also in Finnmark where it exists in the mountains below the tree line. Missing along the entire coast (Vest-Norway) from Kristiansand and northwards, and in the southeast Norway region also along the coast. In Northern Europe generally with a fairly stable occurrence; further south in Europe in decline.
Biology
The egg is white and green, round and flat. The larva is greenish with lighter longitudinal stripes.