Table 2.

Species of Anthidium of the Western Hemisphere recorded from rare, threaten or endangered plants.

Plant species	Bee species	# of records
Asteraceae
Erigeron rhizomatus Cronquist	Anthidium mormonum	3
	Anthidium duomarginatum	3
	Anthidium maculosum	1
Cactaceae
Sclerocactus mesae-verdae (Boissev. ex Hill & Salisb.) L.D. Benson	Anthidium emarginatum	1
Pediocactus sileri (Boissev. ex Hill & Salisb.) L.D. Benson	Anthidium emarginatum	1
Fabaceae
Astragalus humillimus A. Gray	Anthidium dammersi	2
Dalea formosa Torr.	Anthidium palmarum	7