. . . . . . . . . "Chelostoma philadelphi" . . "Erigeron" . . "John Beetham. 2017. Chelostoma philadelphi nectar plant Erigeron. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6189141> 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." .