The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

  • 2006. Manuscript, Checklist of Apoidea of North America.. - 12-Oct-2006
  • 2006. website, Bombus - bumblebees of the world
  • Bombus pennsylvanicus (Degeer), Bumble bee - Biodiversity of Great Smoky Mountains National Park (Discover Life in America, Great Smoky Mountains National Park All Taxa Biodiversity Inventory)
  • Bombus pennsylvanicus (Degeer), Bumble bee - Biodiversity of Great Smoky Mountains National Park (Discover Life in America, Great Smoky Mountains National Park All Taxa Biodiversity Inventory)
  • Close clustering of anthers and stigma in Ipomoea hederacea enhances prezygotic isolation from Ipomoea purpurea, R. A. Smith and M. D. Rausher, New Phytologist, 2006.)
  • Close clustering of anthers and stigma in Ipomoea hederacea enhances prezygotic isolation from Ipomoea purpurea, R. A. Smith and M. D. Rausher, New Phytologist, 2006.)
  • Conservation Impact of Climatic Variability on Pollination of the Federally Endangered Plant, Clematis socialis (Ranunculaceae), M. A. Wall, M. Timmerman-Erskine, and R. S. Boyd, Southeastern Naturalist, Vol. 2, Issue 1, March 2003, pp. 11-24
  • Conservation Impact of Climatic Variability on Pollination of the Federally Endangered Plant, Clematis socialis (Ranunculaceae), M. A. Wall, M. Timmerman-Erskine, and R. S. Boyd, Southeastern Naturalist, Vol. 2, Issue 1, March 2003, pp. 11-24
  • Discover Life - Apidae: Bombus pensylvanicus (DeGeer, 1773) (Discover Life)
  • Discover Life - Apidae: Bombus pensylvanicus (DeGeer, 1773) (Discover Life)
  • Element Stewardship Abstract for Platanthera integra, Alfred E. Schuyler, State of New Jersey, Department of Environmental Protection and Energy
  • Element Stewardship Abstract for Platanthera integra, Alfred E. Schuyler, State of New Jersey, Department of Environmental Protection and Energy
  • Ruggiero M. (project leader), Ascher J. et al. (2013). ITIS Bees: World Bee Checklist (version Sep 2009). In: Species 2000 & ITIS Catalogue of Life, 11th March 2013 (Roskov Y., Kunze T., Paglinawan L., Orrell T., Nicolson D., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Hernandez F., De Wever A., eds). Digital resource at www.catalogueoflife.org/col/. Species 2000: Reading, UK.
  • Social Behavior of Polistine Wasps, Joan E. Strassman, November 8, 2006
  • Variation and Evolution in Plants and Microorganisms: Toward a New Synthesis 50 Years after Stebbins, F. J. Ayala, W. M. Fitch, and M. T. Clegg, Editors, 2000, National Academy of Sciences
  • Variation and Evolution in Plants and Microorganisms: Toward a New Synthesis 50 Years after Stebbins, F. J. Ayala, W. M. Fitch, and M. T. Clegg, Editors, 2000, National Academy of Sciences
  • Williams, P. H. 1998. An annotated checklist of bumble bees with an analysis of patterns of description (Hymenoptera: Apidae, Bombini). Bulletin of the Natural History Museum (Entomology), vol. 67, no. 1
  • Williams, P. H. 1998. An annotated checklist of bumble bees with an analysis of patterns of description (Hymenoptera: Apidae, Bombini). Bulletin of the Natural History Museum (Entomology), vol. 67, no. 1. 79-152

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