The wingspan of this butterfly is 24–26 mm.
Pyrgus malvoides is distributed from Portugal and Spain via southern and central France, southern Switzerland (south of the main Alpine ridge) and Austria (Vorarlberg, Tyrol) to Italy and Istria.
According to previous knowledge, Pyrgus malvoides colonizes various fresh and above all moist habitats in the Alps if these have structures that are favorable to the microclimate, such as open ground on gravel, rocks, obstructions from cattle kicking or erosion, etc. A syntopic occurrence with Pyrgus malvae could not be determined so far. Because of the identification problems in the field, no sucking plants were noted. It is assumed that there are no essential differences to Pyrgus malvae here.
The known altitudinal distribution extends from 800 m to about 2000 m in Bavaria. It is found up to heights of 2500 m in the central Alps.
Adults are on wing from April to September. In Bavaria Pyrgus malvoides flies in one generation from around mid-May to mid-July. A second or even third generation per year, as described e.g. in Italy, was not observed in Bavaria.
The larvae feed on Potentilla, Agrimonia and Fragaria species, but primarily Potentilla erecta. It is reported from Switzerland that the caterpillars have been found on various cinquefoil species (Potentilla neumanniana [= tabernaemontani], Potentilla pusilla, Potentilla erecta) and have eaten Fragaria vesca during breeding.
