Lindsey Milbrath, lrm32@cornell.edu and Jeromy Biazzo, jb262@cornell.edu. USDA-ARS, U.S. Plant, Soil and Nutrition Laboratory, Tower Road, Ithaca, NY
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Species 1: Gentianales Apocynaceae
Vincetoxicum rossicum (pale swallow-wort, dog-strangling vine)
Species 2: Gentianales Apocynaceae
Vincetoxicum nigrum (black swallow-wort, black dog-strangling vine)