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

Brown University - Algae
Catalog #: ABRU00005054
H. H. Bartlett s.n.
Porphyridium cruentum (S.F.Gray) Nägeli
United States, District of Columbia, Washington, DC

Field Museum of Natural History
Catalog #: C0503890F
H. H. Bartlett #584
Porphyridium cruentum (S.F.Gray) Nägeli
United States, District of Columbia, [precise locality unknown]

University of Michigan
Catalog #: 669212
H.H. Bartlett #s.n.
Porphyridium cruentum (S.F.Gray) Nägeli
United States, District of Columbia, Washington

Michigan State University Algae
Catalog #: MSC0184134
H.H. Bartlett #s.n.
Porphyridium purpureum (Bory de Saint-Vincent) K.M.Drew & R.Ross
United States, District of Columbia, Washington

Miami University - Algae
Catalog #: 000210274
H.H. Bartlett #s.n. 22 August 2015
Porphyridium purpureum (Bory de Saint-Vincent) K.M.Drew & R.Ross
United States, District of Columbia, Washington

Yale University Herbarium
Catalog #: YU.095520
Harley Harris Bartlett s.n.
Porphyridium cruentum (S.F.Gray) Nägeli
United States, District of Columbia, Washington, DC