Oligolectic on Fabaceae, with Lotus corniculatus being the most important pollen source. Westrich (1989) lists the following additional pollen sources: Lotus uliginosus, Onobrychis viciifolia, Ononis repens, Ononis spinosa, Vicia cracca, Lathyrus heterophyllus, Lathyrus sylvestris, Lathyrus tuberosus, Lathyrus pratensis, Medicago sativa, Coronilla varia (Fabaceae).
Müller (1996) states that the species is oligolectic on Papilionoideae (Fabaceae). Muller reports the species visiting Lotus corniculatus (Fabaceae) as a pollen source in Switzerland
Pekkarinen (1998) lists the following genera as pollen sources in Finland: Lathyrus, Trifolium and Vicia (Fabaceae).
Pollen analysis (Müller, 1996) revealed the following pollen sources: Fabaceae, and with small traces of Rosaceae, Cistaceae and Asteraceae
De Vries, cited in Knuth (1906) reports visitation to Ranunculus flammula (Ranunculaceae).
Stanisavljević (2000) states that this is an oligolectic species, most often found on species of Fabaceae (Medicago, Trifolium, Lotus), preferring Lotus corniculatus.
Kasparek (2017), summarising known records from many authors lists the following forage sources:Medicago, Trifolium, Lotus corniculatus, Onobrychis viciifolia, Ononis spinosa, Ononis repens, Lathyrus heterophyllus, Lathyrus sylvestris, Lathyrus tuberosus, Lathyrus pratensis, Medicago sativa, Vicia sp., Vicia cracca, Coronilla varia, Genista (Fabaceae). (Fabaceae); Echium vulgare (Boraginaceae); Stachys recta, Stachys sp., Thymus serpyllum (Lamiaceae); Arctium lappa, Crepis paludosa, Erigeron cf. speciosus, Hieracium pilosella (Asteraceae); Anthriscus silvestris (Apiaceae); Calluna vulgaris (Ericaceae), Veronica spicata (Plantaginaceae)