Blue fleabane Erigeron acer grows up to 20in tall in lime-rich areas.

Erigeron acer is a widespread herbaceous plant.

The larvae feed on Erigeron species, including Erigeron acer.

In France, the species fly from July to August, where they also bred upon Erigeron acer angulosus.

In Austria they feed on Erigeron alpinus, while in Norway they can't resist the taste of Erigeron acer politus.

The larvae feed on Aster alpinus, Aster amellus, Aster bellidiastrum, Erigeron acer (including subspecies politus), Erigeron uniflorus and Homogyne alpina.