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

Brown University - Algae
Catalog #: ABRU00004100
N. L. Gardner s.n. 19 May 1906
Characium strictum A.Braun
United States, California, Botanical Laboratory of the University of California, Berkeley, CA

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00148188
b2004c7d-4eb4-4113-82e6-833d4b3ab03a
N. L. Gardner #s.n. 19 May 1906
Characium sessile Hermann
United States, California, Botanical Laboratory of the University of California, Berkeley, CA

University of Michigan
Catalog #: 683735
N.L. Gardner #s.n. 19 May 1906
Characium strictum A.Braun
United States, California, Alameda, Botanical Laboratory, University of California, Berkeley

University of Michigan
Catalog #: 683736
N.L. Gardner #s.n. 19 May 1906
Characium strictum A.Braun
United States, California, Alameda, Botanical Laboratory, University of California, Berkeley

Michigan State University Algae
Catalog #: MSC0181776
N.L. Gardner #s.n. 19 May 1906
Characium strictum A.Braun
United States, California, Alameda, Botanical Laboratory, University of California, Berkeley

Miami University - Algae
Catalog #: 000188440
N.L. Gardner #s.n.
Characium strictum A.Braun
United States, California, Alameda, Botanical Laboratory, University of California, Berkeley

Yale University Herbarium
Catalog #: YU.094408
Nathaniel Lyon Gardner s.n. 19 May 1906
Characium strictum A.Braun
United States, California, Berkeley; Botanical Laboratory, University of California, Berkeley, CA