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

University of North Carolina at Chapel Hill Herbarium; Max & Fran Hommersand Algae Herbarium: Algae
Catalog #: NCU-A-0033325
Gardner, N. L. #s.n. 00 November 1915
Tetraedron minimum (A.Braun) Hansgirg
United States, California, Santa Clara, in Felt Lake, near Stanford University, California

Brown University - Algae
Catalog #: ABRU00005030
N. L. Gardner s.n.
Tetraedron minimum (A.Braun) Hansgirg
United States, California, near Felt Lake, near Stanford University, CA

University Herbarium, University of California, Berkeley
Catalog #: UC693146
N. L. Gardner #s.n. 00 November 1915
Tetraedron minimum (A.Braun) Hansgirg
United States, California, Santa Clara, On water weeds in Felt Lake Near Stanford University.

University Herbarium, University of California, Berkeley
Catalog #: UC1828073
N. L. Gardner #s.n. 00 November 1915
Tetraedron minimum (A.Braun) Hansgirg
United States, California, Santa Clara, On water weeds in Felt Lake, near Stanford University.

University of Michigan
Catalog #: 732270
N.L. Gardner #s.n. 00 November 1915
Tetraedron minimum (A.Braun) Hansgirg
United States, California, Santa Clara, Felt Lake, near Stanford University

Michigan State University Algae
Catalog #: MSC0184998
N.L. Gardner #s.n. 00 November 1915
Tetraedron minimum (A.Braun) Hansgirg
United States, California, Santa Clara, Felt Lake, near Stanford University

Miami University - Algae
Catalog #: 000210259
N.L. Gardner #s.n. 00 November 1915
Tetraedron minimum (A.Braun) Hansgirg
United States, California, Santa Clara, Felt Lake, near Stanford University

Yale University Herbarium
Catalog #: YU.095502
Nathaniel Lyon Gardner s.n.
Tetraedron minimum (A.Braun) Hansgirg
United States, California, near Felt Lake, near Stanford University, CA