. . . . . . . . . "Bombus bimaculatus" . . "Penstemon digitalis" . . "Renee Buck. 2017. Bombus bimaculatus nectar / pollen delivering plant Penstemon digitalis. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6669075> on 05 Apr 2018." . . . . "http://iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world." .