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

Brown University - Algae
Catalog #: ABRU00004308
N. L. Gardner s.n.
Rivularia atra var. hemisphaerica Bornet & Flahault
United States, California, White's Point, San Pedro, CA

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012568
N. L. Gardner #1561 00 December 1908
Rivularia atra var hemisphaerica
United States, California, Los Angeles, San Pedro

Michigan State University Algae
Catalog #: MSC0184480
N.L. Gardner #s.n. 00 December 1908
Rivularia atra f. hemisphaerica (Bornet & Flahault) Kossinskaja
United States, California, Los Angeles, White's Point, San Pedro

Miami University - Algae
Catalog #: 000189034
N.L. Gardner #s.n. 00 December 1908
Rivularia atra f. hemisphaerica (Bornet & Flahault) Kossinskaja
United States, California, Los Angeles, White's Point, San Pedro

Yale University Herbarium
Catalog #: YU.094615
Nathaniel Lyon Gardner s.n.
Rivularia atra var. hemisphaerica Bornet & Flahault
United States, California, White's Point, San Pedro, CA