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

Brown University - Algae
Catalog #: ABRU00004483
W. J. V. Osterhout s.n. 21 June 1906
Scytonema hofmannii C.Agardh ex Bornet & Flahault
United States, California, Marin, Marin County, CA

Michigan State University Algae
Catalog #: MSC0184652
W.J.V. Osterhout #s.n. 21 June 1906
Scytonema hofmannii C.Agardh ex Bornet & Flahault
United States, California, Marin, [No precise loc]

Miami University - Algae
Catalog #: 000210564
W.J.V. Osterhout #s.n.
Scytonema hofmannii C.Agardh ex Bornet & Flahault
United States, California, Marin, [No precise loc]

Yale University Herbarium
Catalog #: YU.094954
Winthrop John Vanleuven Osterhout s.n. 21 June 1906
Scytonema hofmannii C.Agardh ex Bornet & Flahault
United States, California, Marin, Marin County, CA