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

Brown University - Algae
Catalog #: ABRU00003935
W. J. V. Osterhout s.n.
Hormotila mucigena Borzì
United States, California, Hayward's, near Oakland, CA

University Herbarium, University of California, Berkeley
Catalog #: UC1827353
W. J. V. Osterhout #s.n. 00 January 1904
Hormotila mucigena Borzì
United States, California, Alameda, Haywardʻs, near Oakland.

University of Michigan
Catalog #: 729875
W.J.V. Osterhout #s.n. 00 January 1904
Hormotila mucigena Borzì
United States, California, Alameda, Hayward's, near Oakland

University of Michigan
Catalog #: 729876
W.J.V. Osterhout #s.n. 00 January 1904
Hormotila mucigena Borzì
United States, California, Alameda, Hayward's, near Oakland

Michigan State University Algae
Catalog #: MSC0183043
W.J.V. Osterhout #s.n. 00 January 1904
Hormotila mucigena Borzì
United States, California, Alameda, Hayward's, near Oakland

Miami University - Algae
Catalog #: 000188214
W.J.V. Osterhout #s.n. 00 January 1904
Hormotila mucigena Borzì
United States, California, Alameda, Hayward's, near Oakland

Yale University Herbarium
Catalog #: YU.094174
Winthrop John Vanleuven Osterhout s.n.
Hormotila mucigena Borzì
United States, California, Hayward's, near Oakland, CA