Fissidens fontanus, (B. Pyl.) Steud.

Fissidens fontanus is an aquatic moss that can be found throughout the gorge under flowing water. It is often found in small dense clumps. The leaves are lanceolate with a noticeable costa and small pocket-like structure on one side of the costa.

According to the NYSDEC, New York Rare Moss Status list 2008 this moss is  ranked as an S2.