Müller (1996) states that this is probably an oligolectic species.Pollen analysis from a limited sample, showed the species specialising in Cardueae (Asteraceae) pollen.
Cross (2019, https://www.flickr.com/photos/153642180@N07/47944111476/in/album-72157708786976801/) reports visitation to Helichrysum stoechas (Asteraceae) in Iberia, so Helichrysum is a potential pollen host.