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

Brown University - Algae
Catalog #: ABRU00004687
F. S. Collins s.n. 04 May 1912
Dudresnaya crassa M.A.Howe
Bermuda, Shelly Bay, Bermuda

Yale University Herbarium
Catalog #: YU.095155
Frank Shipley Collins s.n. 04 May 1912
Dudresnaya crassa M.A.Howe
Bermuda, Shelly Bay, Bermuda