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

Brown University - Algae
Catalog #: ABRU00003715
W. A. Setchell s.n.
Ulothrix tenuissima Kützing
United States, Alaska, Unalaska, AK

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00212325
cca3cef7-84b7-4a49-a849-4d475ae1473e
W. A. Setchell; A. A. Lawson #s.n. 00 July 1899
Ulothrix tenuissima K
United States, Alaska, Unalaska

University of Michigan
Catalog #: 733013
W.A. Setchell #s.n. 00 July 1899
Ulothrix tenuissima Kützing
United States, Alaska, Unalaska

University of Michigan
Catalog #: 733014
W.A. Setchell #s.n. 00 July 1899
Ulothrix tenuissima Kützing
United States, Alaska, Unalaska

Michigan State University Algae
Catalog #: MSC0185112
W.A. Setchell #s.n. 00 July 1899
Ulothrix tenuissima Kützing
United States, Alaska, Unalaska

Miami University - Algae
Catalog #: 000187998
W.A. Setchell #s.n. 00 July 1899
Ulothrix tenuissima Kützing
United States, Alaska, Unalaska

Yale University Herbarium
Catalog #: YU.092104
William Albert Setchell s.n. 00 July 1899
Ulothrix tenuissima Kützing
United States, Alaska, Unalaska, AK