Collins, Holden & Setchell, Phycoth. Bor.-Amer.
Collins, F.S.; Holden, I.; Setchell, W.A. [1-2300]

University of Michigan
Catalog #: 638530
F.S. Collins #s.n. 08 July 1908
Ralfsia verrucosa (Areschoug) ??Areschoug
United States, Maine, Stover's Point, Harpswell

University of Michigan
Catalog #: 638537
F.S. Collins #s.n. 08 July 1908
Ralfsia verrucosa (Areschoug) ??Areschoug
United States, Maine, Stover's Point, Harpswell

Field Museum of Natural History
Catalog #: C0519855F
F.S. Collins #s.n. 08 July 1908
Ralfsia verrucosa (Areschoug) ??Areschoug
United States, Maine, Cumberland, Stover's Point, Harpswell

Michigan State University Algae
Catalog #: MSC0184424
F.S. Collins #s.n. 08 July 1908
Ralfsia verrucosa (Areschoug) ??Areschoug
United States, Maine, Cumberland, Stover's Point, Harpswell