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

Brown University - Algae
Catalog #: ABRU00003989
A. W. Evans s.n.
Protosiphon botryoides (Kützing) Klebs
United States, Connecticut, New Haven, CT

University of Michigan
Catalog #: 731365
A.W. Evans #s.n. 00 October 1905
Protosiphon botryoides (Kützing) Klebs
United States, Connecticut, New Haven, New Haven

University of Michigan
Catalog #: 731368
A.W. Evans #s.n. 00 October 1905
Protosiphon botryoides (Kützing) Klebs
United States, Connecticut, New Haven, New Haven

Michigan State University Algae
Catalog #: MSC0184203
A.W. Evans #s.n. 00 October 1905
Protosiphon botryoides (Kützing) Klebs
United States, Connecticut, New Haven, New Haven

Miami University - Algae
Catalog #: 000188264
A.W. Evans #s.n. 00 October 1905
Protosiphon botryoides (Kützing) Klebs
United States, Connecticut, New Haven, New Haven

Yale University Herbarium
Catalog #: YU.094294
Alexander William Evans s.n. 00 October 1905
Protosiphon botryoides (Kützing) Klebs
United States, Connecticut, New Haven, New Haven; New Haven, CT