Polylectic, pollen sources include Fabaceae, Asteraceae (Asteroideae, Carduoideae, Cichorioideae), Cistaceae, Brassicaceae, Caryophyllaceae, Boraginaceae (e.g. Echium), Resedaceae, Papaver (Papaveraceae), Antirrhineae and monocots (A. Müller, unpublished, based on 37 pollen samples from 16 different localities).