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Alligatorweed
(Alternanthera philoxeroides)
Found an invasive species? Register for a free login account, or submit a public report.
Parrot feather water-milfoil
Myriophyllum aquaticum Photo credit: © Dr. Erica Bower/Flickr
Yellow floating heart
Nymphoides peltata Photo credit: 영철 이, Flickr Creative Commons
Hydrilla
Hydrilla verticillata Photo credit: Graves Lovell, Alabama DCNR, Bugwood.org
Water chestnut
Trapa natans Photo credit: © Fredy Wyss/Flickr
Aquatic Plants
Common: Species found in at least 1/3 of Pennsylvania counties. (This does not include cultivated occurrences.)
Uncommon: Species found in Pennsylvania, but not widespread (i.e., found in less than 1/3 of Pennsylvania counties.)
Not present: Species not yet found in Pennsylvania.
Note: Species list updated in September 2021.
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