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

Brown University - Algae
Catalog #: ABRU00004413
F.S. Collins s.n. 04 July 1910
Xanthidium armatum Brébisson ex Ralfs
United States, Massachusetts, Eastham, MA

University of Michigan
Catalog #: 736569
F.S. Collins #s.n. 04 July 1910
Xanthidium armatum Brébisson ex Ralfs
United States, Massachusetts, Barnstable, Eastham

University of Michigan
Catalog #: 736570
F.S. Collins #s.n. 04 July 1910
Xanthidium armatum Brébisson ex Ralfs
United States, Massachusetts, Barnstable, Eastham

Michigan State University Algae
Catalog #: MSC0185285
F.S. Collins #s.n. 04 July 1910
Xanthidium armatum Brébisson ex Ralfs
United States, Massachusetts, Barnstable, Eastham

Miami University - Algae
Catalog #: 000189187
F.S. Collins #s.n.
Xanthidium armatum Brébisson ex Ralfs
United States, Massachusetts, Barnstable, Eastham

Yale University Herbarium
Catalog #: YU.094722
Frank Shipley Collins s.n. 04 July 1910
Xanthidium armatum Brébisson ex Ralfs
United States, Massachusetts, Barnstable, Eastham; Eastham, MA