Polylectic: with pollen from at leat 10 plant families recorded: Apiaceae, Asteraceae, Brassicaceae, Campanulaceae, Caryophyllaceae, Chenopodiaceae, Fabaceae, Gentianaceae, Lamiaceae and Rosaceae, although plants in the family Apiaceae are generally preferred.
Müller & Kuhlmann (2008) list as pollen sources: Apiaceae, Cistaceae, Crassulaceae, Resedaceae, Campanulaceae, Brassicaceae and Carduoideae (Asteraceae) based on 15 pollen loads from 13 different localities.
Specific pollen records are of Daucus carota, Heracleum sphondylium, Eryngium maritimum, Pastinaca sativa (Apiaceae) Centaurea nigra, Hypochoeris radicata, Senecio jacobaea (Asteraceae), Jasione montana (Campanulaceae), Thymus polytrichus (Lamiaceae) and Rubus caesius (Rosaceae) (Westrich, 2001)
Finnish flower records are of Heracleum, Aegopodium (Apiaceae) and Geranium (Geraniaceae) (Söderman & Leinonen, 2003).
Müller & Kuhlmann, (unpublished) state that the species is clearly a polylectic species collecting pollen on Fabaceae, Apiaceae, Odontites (Orobanchaceae), Brassicaceae, Resedaceae and others.
Fiedler (unpublished) reported that on the Scottish island of Islay, males were found nectaring at Rosa pimpinellifolia (Rosaceae); Thymus sp. (Lamiaceae); Cirsium arvense, Cirsium vulgare (Asteraceae) and females were nectaring at Cirsium arvense, Cirsium vulgare (Asteraceae); Galium verum (Rubiaceae). Fiedler further reports pollen from the following species as present in the scopae of females: Thymus (Lamiaceae)(34% of pollen); Trifolium repens (Fabaceae)(23% of pollen); Erodium cicutarium (Geraniaceae); Ranunculus sp. (Ranunculaceae); Galium verum (Rubiaceae); Cirsium sp., Sonchus sp., Achillea millefolium (Asteraceae); Cardamine pratensis (Brassicaceae); Euphrasia (Scrophulariaceae); Rosa pimpinellifolia (Rosaceae); Plantago sp. (Plantaginaceae); Centaurium littorale (Gentianaceae); Sagina nodosa (Caryophyllaceae)(16% of pollen).
Jukes (2010) reported: Analysis of the pollen loads from ten bees at this site this bee shows that it appears to collect pollen regularly from an Oenanthe species which here obviously must be hemlock water dropwort, Oenanthe crocata (Apiaceae), Rubus fruticosus, Rosa (Rosaceae)(considering the time of year) and Asteraceae which could be Crepis capillaris. Occasionally it takes pollen of Jasione montana (Campanulaceae) another Apiaceae type and some species of Brassicaceae.