. . . . . . . . . "Bombus centralis" . . "Cirsium" . . "Leslie Flint. 2015. Bombus centralis associated species with names lookup Cirsium. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1808431> 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." .