alligatorweed USDA PLANTS Symbol: ALPH
U.S. Nativity: Exotic
Habit: Aquatic
Alternanthera philoxeroides (Mart.) Griseb.
Taxonomic Rank: Magnoliopsida: Caryophyllales: Amaranthaceae
Synonym(s): alligator weed, pig weed
Native Range: So. Amer. (GRIN);

U.S. State(s) where reported invasive:

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U.S. National Parks where reported invasive:
Colonial National Historical Park (Virginia)