Osmia (Helicosmia) labialis Pérez , 1879

Broadly oligolectic on Asteraceae (Amiet et al., 2004; Herrmann, 2010; A. Müller, unpublished, based on 1 pollen sample). Müller (2018) states that the species is broadly oligolectic on Carduoideae (Asteraceae).

Müller (2018) lists the following pollen sources in the Alps: Asteraceae (Carduoideae, Cichorioideae, Asteroideae); Helianthemum (Cistaceae).

Flower records: Carduus defloratus, Centaurea scabiosa (Herrmann, 2010).

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