The American bumble bee (Bombus pensylvanicus), is so named because it occurs throughout North America, from Quebec south to Florida and into Mexico. The American bumble bee is a generalist feeder that forages on plants in the milkweed (Asclepiadaceae), composite (Asteraceae), forget-me-not (Boraginaceae), honey-suckle (Caprifoliaceae), morning-glory (Convolvulaceae), legume (Fabaceae), mint (Lamiaceae), blazing star (Primulaceae), rose (Rosaceae), snapdragon (Scrophulariaceae), and nightshade (Solanaceae) families.
- 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
- Element Stewardship Abstract for Platanthera integra, Alfred E. Schuyler, State of New Jersey, Department of Environmental Protection and Energy
- 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
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