Cane, J.H.; Dunne, R. 2014. Generalist bees pollinate red-flowered Penstemon eatonii: Duality in the hummingbird pollination syndrome. American Midland Naturalist. 171(2): 365-370.

Cane, J.H.; Dunne, R. 2014. Generalist bees pollinate red-flowered Penstemon eatonii: Duality in the hummingbird pollination syndrome. American Midland Naturalist. 171(2): 365-370.