Grimmia pennsylvanica Schwägr. ex Sull. & Lesq.
Grimmia pennsylvanica is the name of a species, part of the genus Grimmia.
This species has been described by Schwägr. ex Sull. & Lesq. under the rules of the International Code of Nomenclature for algae, fungi, and plants (ICN / commonly called the botany code).