[1] The undersides are a bright green with a thin white line, often reduced to a faint row of dots or even missing altogether.

— polaris Moschl [C. r. borealis Krulikovsky, 1890], from the most northern districts of the area of distribution , is a small form, with the underside duller green.

[now species Callophrys suaveola (Staudinger, 1881)(72 f), from Central Asia, is as large as the largest European specimens, the upperside darker, the underside deeper green.

— There occur, moreover, a number of individual varieties; for instance, specimens with the underside brown instead of green, females with a reddish yellow discal spot on the forewing above (Blachier), etc.

Pupa short, much rounded; resembling a small bean, immovable, but nevertheless producing a feeble noise, which Kleemann calls creaking,Schilde twittering or chirping.

They are very plentiful in most places and always rest with closed wings on shrubs and green twigs of Genista; they are not shy, the spring-specimens being particularly fond of the flowers of Potentilla.

Early butterfly collectors thought that the only food plant was bramble (blackberry) Rubus fruticosus but as its habits became better understood the list grew and will probably continue to do so.

Depending on the habitat it will use common rock rose Helianthemum nummularium, bird's-foot trefoil Lotus corniculatus, gorse Ulex europaeus, broom Cytisus scoparius, Dyer's greenweed Genista tinctoria, bilberry Vaccinium myrtillus, dogwood Cornus sanguinea, buckthorn Rhamnus cathartica, cross-leaved heath Erica tetralix and bramble.

[3][6] Callophrys rubi is found in most of Europe,[7] North Africa, Russia, Asia Minor, Siberia, Amurland, Baluchistan and Chitral.