[700-?]

North Carolina State University Vascular Plant Herbarium
Catalog #: NCSC00075459
Frye, Wilbert M. #s.n. 30 July 1947
Oenothera argillicola Mack.
United States, West Virginia, Hampshire, at E end of bridge crossing South Branch River, 4 mi E of Springfield

Western Carolina University Herbarium
Catalog #: WCUH0017018
Frye, Wilbert M. #s.n. 30 July 1947
Oenothera argillicola Mack.
United States, West Virginia, Hampshire, at E end of bridge crossing South Branch River, 4 mi E of Springfield

Duke University Vascular Plant Collection
Catalog #: DUKE10082170
Frye, Wilbert M. #s.n. 30 July 1947
Oenothera argillicola Mack.
United States, West Virginia, Hampshire, at E end of bridge crossing South Branch River, 4 mi E of Springfield

Duke University Vascular Plant Collection
Catalog #: DUKE10082171
Frye, Wilbert M. #s.n. 30 July 1947
Oenothera argillicola Mack.
United States, West Virginia, Hampshire, at E end of bridge crossing South Branch River, 4 mi E of Springfield

University of North Carolina at Chapel Hill Herbarium: Vascular Plants
Catalog #: NCU00056716
Frye, Wilbert M. #s.n. 30 July 1947
Oenothera argillicola Mack.
United States, West Virginia, Hampshire, at E end of bridge crossing South Branch River, 4 mi E of Springfield