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

Brown University - Algae
Catalog #: ABRU00005057
N. L. Gardner s.n.
Nitophyllum violaceum J.Agardh
United States, California, Los Angeles, Venice, CA

Michigan State University Algae
Catalog #: MSC0182268
N.L. Gardner #s.n. 00 April 1911
Cryptopleura violacea (J.Agardh) Kylin
United States, California, Los Angeles, Venice

Miami University - Algae
Catalog #: 000210277
N.L. Gardner #s.n. 00 April 1911
Cryptopleura violacea (J.Agardh) Kylin
United States, California, Los Angeles, Venice

Yale University Herbarium
Catalog #: YU.095523
Nathaniel Lyon Gardner s.n.
Nitophyllum violaceum J.Agardh
United States, California, Los Angeles, Venice, CA