Please cite all the biological data, including the maps as: Kartesz, J.T., The Biota of North America Program (BONAP). 2011. North American Plant Atlas (http://www.bonap.org/MapSwitchboard.html). Chapel Hill, N.C. [maps  generated from Kartesz, J.T. 2010. Floristic Synthesis of North America, Version 1.0. Biota of North America Program (BONAP). (in press)].

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