Reference citation:
Steury, B.W., Droege, S.W. & Oberg, E.T. (2009). Bees (Hymenoptera: Anthophila) of a Riverside Outcrop Prairie in Fairfax County, Virginia. Banisteria, 34, 17?24

Source citation:
National Database Plant Pollinators. Center for Plant Conservation at San Diego Zoo Global. Accessed via https://saveplants.org/national-collection/pollinator-search/ on 2020-06-05.

Source archive URL:
https://github.com/globalbioticinteractions/cpc-pollinators/archive/c0ea6f2fd5d7bc9d2db5cb0f27248b84637e20ef.zip

Reference citation:
lydiasweeney. 2020. Bombus impatiens interaction->visited flower of Cephalanthus occidentalis. iNaturalist.org. Accessed at on 23 Jan 2021.

Source citation:
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.

Source archive URL:
https://github.com/globalbioticinteractions/inaturalist/archive/8d3e240982f0f68b3da2767abe9b27e5bbfeed41.zip

Reference citation:
molanic. 2020. Bombus impatiens nectar plant Cephalanthus occidentalis. iNaturalist.org. Accessed at on 23 Jan 2021.

Source citation:
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.

Source archive URL:
https://github.com/globalbioticinteractions/inaturalist/archive/8d3e240982f0f68b3da2767abe9b27e5bbfeed41.zip

Reference citation:
craghorne. 2019. Bombus impatiens interaction->visited flower of Cephalanthus occidentalis. iNaturalist.org. Accessed at on 23 Jan 2021.

Source citation:
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.

Source archive URL:
https://github.com/globalbioticinteractions/inaturalist/archive/8d3e240982f0f68b3da2767abe9b27e5bbfeed41.zip