. . . . . . . . . "Bombus vosnesenskii" . . "Rudbeckia californica" . . "Danilo Hegg. 2015. Bombus vosnesenskii interaction->visited flower of Rudbeckia californica. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/2472344> 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." .