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

Yale University Herbarium
Catalog #: YU.091597
Miss S. P. Monks s.n. 00 August 1898
Enteromorpha acanthophora Kützing
United States, California, Santa Paula Mountains, CA

Brown University - Algae
Catalog #: ABRU00003136
S. P. Monks s.n.
Enteromorpha acanthophora Kützing
United States, California, Santa Paula Mountains, CA

University of Michigan
Catalog #: 733162
S.P. Monks #s.n. 00 August 1898
Ulva acanthophora (Kützing) Hayden, Blomster, Maggs, P.C.Silva, Stanhope & J.R.Waaland
United States, California, Ventura, Santa Paula Mountains

University of Michigan
Catalog #: 733158
S.P. Monks #s.n. 00 August 1898
Ulva acanthophora (Kützing) Hayden, Blomster, Maggs, P.C.Silva, Stanhope & J.R.Waaland
United States, California, Ventura, Santa Paula Mountains

Michigan State University Algae
Catalog #: MSC0185142
S.P. Monks #s.n. 00 August 1898
Ulva acanthophora (Kützing) Hayden, Blomster, Maggs, P.C.Silva, Stanhope & J.R.Waaland
United States, California, Ventura, Santa Paula Mountains

Miami University - Algae
Catalog #: 000186922
S.P. Monks #s.n. 00 August 1898
Enteromorpha acanthophora Kützing
United States, California, Ventura, Santa Paula Mountains