Acknowledgments
Maps are provided courtesy of USDA PLANTS, when available. Users should note that these maps provide only general guidance regarding the distribution of respective taxa. Maps used in this work were generated between 2010 and 2013. Updates are available at USDA PLANTS.
The thumbnail viewer was developed by Highslide Software (Torstein Hønsi, proprietor). Code for expanding/collapsing content was modified from the public domain code developed by Leo Charre and Jesse Fergusson (internetconnection.net).
This work was supported in part by NC Extension, the North Carolina Agricultural Research Service, and the National Institute of Food and Agriculture, U.S. Department of Agriculture, acc. nos. 62303 and 1002682.