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

Brown University - Algae
Catalog #: ABRU00004051
N. L. Gardner s.n. 01 May 1906
Microspora willeana Lagerheim
United States, California, North Berkeley, CA

University of Michigan
Catalog #: 730137
N.L. Gardner #s.n. 01 May 1906
Microspora willeana Lagerheim
United States, California, Alameda, North Berkeley

University of Michigan
Catalog #: 730138
N.L. Gardner #s.n. 01 May 1906
Microspora willeana Lagerheim
United States, California, Alameda, North Berkeley

Michigan State University Algae
Catalog #: MSC0183526
N.L. Gardner #s.n.
Microspora willeana Lagerheim
United States, California, Alameda, North Berkeley

Miami University - Algae
Catalog #: 000188328
N.L. Gardner #s.n.
Microspora willeana Lagerheim
United States, California, Alameda, North Berkeley

Yale University Herbarium
Catalog #: YU.094359
Nathaniel Lyon Gardner s.n. 01 May 1906
Microspora willeana Lagerheim
United States, California, Alameda, North Berkeley, CA; North Berkeley, CA