Polylectic. Westrich (1989) lists the following plant species as pollen sources in Germany: Jasione montana (Campanulaceae); Helianthemun nummularium (Cistaceae); Sedum reflexum, Sempervivum arachnoideum (Crassulaceae); Lotus corniculatus, Medicago sativa, Trifolium repens (Fabaceae); Potentilla reptans (Rosaceae). Lotus is clearly favoured. Westrich additionally lists Echium vulgare (Boraginaceae) on his website (http://paul-westrich.de/index.php)
Mavromoustakis (1960) lists the following forage sources on Rhodos: Rubus ulmifolius anatolicus (Rosaceae); Vitex agnus-castus (Verbenaceae); Centaurea (Asteraceae). The same author (Mavromoustakis, 1948; 1951; 1952) lists Satureja incana (Lamiaceae); Rubus ulmifolius anatolicus (Rosaceae); Carlina lanata (Asteraceae); Ononis sp., Medicago sp., Lotus sp., Alhagi maurorum (Fabaceae); Kickxia (=Linaria) elatine (Plantaginaceae); Eryngium creticum (Apiaceae); Heliotropium europeum (Boraginaceae); Linum maritimum (Linaceae) as forage sources in Cyprus.
Pesenko in Banaszak (1995) and Ivanov et al (2005) state that this is an oligolectic species, specialising in Fabaceae. Stanisavljević (2000), copying Banaszak & Romasenko (1998) lists the following species as pollen sources: Vicia, Coronilla, Trifolium, Amorpha, Medicago and Lotus corniculatus (Fabaceae).
Mueller (1996) states that this is a polylectic species, with a strong preference for Papilionoideae (Fabaceae) pollen citing Lotus corniculatus (Fabaceae) and Linaria vulgaris (Scrophulariaceae) as pollen sources in Switzerland.
Pollen analysis (Muller, 1996) revealed the following pollen sources: Fabaceae and with smaller quantities of Brassicaceae, Resedaceae, Crassulaceae, Rosaceae, Cistaceae, Lythraceae, Apiaceae, Primulaceae, Rubiaceae, Boraginaceae, Lamiaceae, Scrophulariaceae, Campanulaceae and Asteraceae.