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Sad mason bee

(c) Smithsonian Institution, National Museum of Natural History, Department of Entomology, some rights reserved (CC BY-NC-SA)

Sad mason bee

Osmia tristella

insectView on iNaturalist

Plants that support Sad mason bee

2 plants

Bald-hip Rose

Rosa gymnocarpa

moderate

shrub

Spring active forager on available pollen

Bay Area nativeKeystone species

Fool's-onion

Triteleia hyacinthina

moderate

geophyte

Spring pollen for offspring provisions

Bay Area native