Plant Parasites of Europe

leafminers, galls and fungi

Phengaris alcon

Phengaris alcon (Denis & Schiffermüller, 1775)

alcon blue

on Gentiana, Swertia


Larvae initially feed on the flower and fruits; older larvae are social parasites in ants nest (Myrmica species).

host plants

Gentianaceae, oligophagous

Gentiana asclepiadea, cruciata, pneumonanthe; Swertia perennis.

distribution within Europe

PESI (2021).

ei, larva, pupa

see Lepiforum.


Maculinea alcon.


Bálint (1993b), Duffey (1993c), Dupont, Luquet, Demerges & Drouet (2013a), Lepiforum (2021), Sanetra, Güsten & Trusch (2015a|).

Last modified 23.vii.2021