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

Brown University - Algae
Catalog #: ABRU00004508
F. S. Collins s.n. 08 July 1908
Ralfsia verrucosa (Areschoug) ??Areschoug
United States, Maine, Cumberland, Harpswell; Stover's Point, Harpswell, ME

Miami University - Algae
Catalog #: 000210589
F.S. Collins #s.n.
Ralfsia verrucosa (Areschoug) ??Areschoug
United States, Maine, Cumberland, Stover's Point, Harpswell

Yale University Herbarium
Catalog #: YU.094979
Frank Shipley Collins s.n. 08 July 1908
Ralfsia verrucosa (Areschoug) ??Areschoug
United States, Maine, Cumberland, Harpswell; Stover's Point, Harpswell, ME