. . . . . . . . . "Bombus griseocollis" . . "Veronicastrum virginicum" . . "moore. 2017. Bombus griseocollis nectar / pollen delivering plant Veronicastrum virginicum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6871507> 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." .