<em>Porella wataugensis</em> (Sull.) Howe (Hepaticae), described from northwest North Carolina in 1856 is represented by very few collections. Because of its rarity and confusion with <em>Porella pinnata</em> L., doubts about its specific distinction have been perpetuated. Recent collections compare favorably with the type material and confirm the plant as an autonomous species. Its range is established as endemic to a small area in the southern Appalachian Mountains.