Flower-Visiting Insects
of Gumweed

Grindelia squarrosa (Gumweed) introduced
(Bees flies suck nectar, otherwise insect activity is unspecified; observations are from Reed, Graenicher, Krombein et al., Discover Life, and Williams as indicated below; Gumweed is native to the central & western plains)

Bees (long-tongued)
Anthophoridae (Ceratinini): Ceratina sp. (Re); Megachilidae (Megachilini): Megachile latimanus (Re)

Bees (short-tongued)
Halictidae (Halictinae): Lasioglossum lineatulus (Re), Lasioglossum pilosus (Re); Halictidae (Nomiinae): Nomia nortoni nortoni (Kr), Nomia triangulifera (Kr); Andrenidae (Andreninae): Andrena accepta (Kr), Andrena canadensis (DL), Andrena hirticincta (DL); Andrenidae (Panurginae): Calliopsis coloradensis (Kr)

Bombyliidae: Sparnopolius confusus (Gr), Systoechus sp. (Re); Syrphidae: Eristalis stipator (Re)

Chauliognathus pennsylvanicus (Wms)