Polylectic with strong preference for Fabaceae. Flower records are summarised by Monsevicius (2004), and list the following forage species: Jasione montana (Campanulaceae); Sedum acre (Crassulaceae); Melilotus albus (Fabaceae); and Brassicaceae.
Müller & Kuhlmann (2008) list the following pollen sources: Fabaceae and Crassulaceae. based on 4 pollen samples from 3 different localities.