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Many of the photographs in this tool were produced by Shaun Winterton. Original drawings were created by Heather Hartzog (USDA APHIS PPQ S&T), Shaun Winterton, and Julia Scher. All other photographs, drawings, and other digital images in this tool are credited to others. The photographers, organizations and/or businesses who gave permission to use their digital images are credited in some but not all image captions, directly on some images themselves, and in the acknowledgements.
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Winterton, S., Scher, J., and Redford, A.J. 2015. Aquarium and Pond Plants
of the World, Edition 2.1. USDA APHIS PPQ Identification Technology Program, North Carolina State University,
and California Department of Food and Agriculture.
[date you accessed site] <http://idtools.org/id/appw/>
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