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Alligatorweed
(Alternanthera philoxeroides)
Found an invasive species? Register for a free login account, or submit a public report.
Gold-moss
Sedum acre Photo credit: © Stephen Buchan/Flickr
Oriental bittersweet
Celastrus orbiculatus Photo credit: Flickr user "Slow Turning"
Japanese barberry
Berberis thunbergii Photo credit: © Dan Nydick
Norway maple
Acer platanoides Photo credit: Pixabay.com
Terrestrial 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.