. . . . . . . . . "Bombus rufocinctus" . . "Ratibida pinnata" . . "aarongunnar. 2016. Bombus rufocinctus nectar plant Ratibida pinnata. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/3740327> 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." .