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

Brown University - Algae
Catalog #: ABRU00003713
N. L. Gardner s.n.
Spirogyra spreeiana Rabenhorst
United States, Washington, Penn's Cove, Whidbey Island, WA

University of Michigan
Catalog #: 736736
N.L. Gardner #s.n. 00 July 1901
Spirogyra spreeiana Rabenhorst
United States, Washington, Island, Penn's Cove, Whidbey Island

University of Michigan
Catalog #: 736737
N.L. Gardner #s.n. 00 July 1901
Spirogyra spreeiana Rabenhorst
United States, Washington, Island, Penn's Cove, Whidbey Island

Michigan State University Algae
Catalog #: MSC0184809
N.L. Gardner #s.n. 00 July 1901
Spirogyra spreeiana Rabenhorst
United States, Washington, Island, Small pond near Penn's Cove, Whidbey Island

Miami University - Algae
Catalog #: 000187996
N.L. Gardner #s.n. 00 July 1901
Spirogyra spreeiana Rabenhorst
United States, Washington, Island, Penn's Cove, Whidbey Island

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00147852
9f964170-7e05-42a5-936d-e338a79b2aaa
N.L. Gardner #s.n. 00 July 1901
Spirogyra spreeiana Rabenhorst
United States, Washington, Island, near Penn's Cove, Whidbey Island

Yale University Herbarium
Catalog #: YU.092102
Nathaniel Lyon Gardner s.n.
Spirogyra spreeiana Rabenhorst
United States, Washington, Island, Penn's Cove, Whidbey Island, WA