[2800-?]

University of North Carolina at Chapel Hill Herbarium: Vascular Plants
Catalog #: NCU00348468
Roberts, Marvin L. #4086 10 August 1973
Azolla caroliniana Willd.
United States, Ohio, Stark, Abundant on canal for about 3 miles... along State Route 236 (old Route 21) near T552, Section 30, Ohio-Erie Canal at Crystal Springs, Jackson Township

West Virginia University Herbarium
Catalog #: WVA-V-0095373
9c674b20-d138-4711-87ac-3325558be0e8
Roberts, Marvin L. #4086 10 August 1973
Azolla caroliniana Willd.
United States, Ohio, Stark, along State Route 236 (old Route 21) near T552, Section 30, Ohio - Erie Canal at Crystal Springs, Jackson TOwnship