Oligolectic: Brassicaceae. Westrich (1989) lists the following plants as pollen sources: Brassica napus, Brassica rapa, Raphanus raphanistrum, Capsella bursa-pastoris, Barbarea vulgaris and Cardaria draba. Scheuchl (in prep.) confirms this lectic status.
Tomozei (2014) citing Dylewska (1987) lists: Cardaria draba, Barbarea vulgaris, Capsella bursa-pastoris, Brassica, Crambe tatarica (Brassicaceae); Crepis, Leontodon, Taraxacum (Asteraceae) and Melilotus (Fabaceae).