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

Brown University - Algae
Catalog #: ABRU00004203
F. S. Collins s.n.
Euastrum insulare (Wittrock) Roy
United States, Massachusetts, Medford, MA

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00142717
65106da3-fabb-4d3c-903b-bd6bee1f7ce0
F. S. Collins #s.n. 00 August 1907
Euastrum Ehrenberg ex Ralfs, 1848
United States, Massachusetts, Medford, MA

University of Michigan
Catalog #: 736264
F.S. Collins #s.n. 00 August 1907
Euastrum insulare (Wittrock) Roy
United States, Massachusetts, Middlesex, Medford

University of Michigan
Catalog #: 736265
F.S. Collins #s.n. 00 August 1907
Euastrum insulare (Wittrock) Roy
United States, Massachusetts, Middlesex, Medford

Michigan State University Algae
Catalog #: MSC0182614
F.S. Collins #s.n. 00 August 1907
Euastrum insulare (Wittrock) Roy
United States, Massachusetts, Middlesex, Medford

Miami University - Algae
Catalog #: 000188538
F.S. Collins #s.n. 00 August 1907
Euastrum insulare (Wittrock) Roy
United States, Massachusetts, Middlesex, Medford

Yale University Herbarium
Catalog #: YU.094510
Frank Shipley Collins s.n.
Euastrum insulare (Wittrock) Roy
United States, Massachusetts, Middlesex, Medford; Medford, MA