Starry stonewort
Starry stonewort

Nitellopsis obtusa Photo credit: Jim Grazio, Pennsylvania Department of Environmental Protection (2015)

press to zoom
Golden alga
Golden alga

Prymnesium parvum Photo credit: FWC Fish and Wildlife Research Institute

press to zoom
Starry stonewort
Starry stonewort

Nitellopsis obtusa Photo credit: Kristian Peters-Fabelfroh 12:41, October 2006-Wikimedia Commons

press to zoom

Algae

Common: Species found in at least 1/3 of Pennsylvania counties.

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.