Polylectic: visiting mainly Campanulaceae and Geranium (Geraniaceae)
Pesenko in Banaszak (1995) state that this is an oligolectic species, specialising in Campanulaceae.
Dylewska (1987) lists the following forage plants: Campanula sibirica (Campanulaceae), Geranium (Geraniaceae) and Veronica chamaedrys (Scrophulariaceae). The last species is certainly as a nectar source. Data from specimens and observations are as follows: Legousia pentagonia (Campanulaceae).