Underwood & Cook, Hepat. Amer.
Underwood, L.M.; Cook, O.F. [1 - 200]

University of Michigan Herbarium
Catalog #: 698553
M. A. Howe #s. n. 00 March 1892
Porella cordaeana (Huebener) Moore
USA, California, Marin, Mill Valley

Field Museum of Natural History
Catalog #: C0069614F
1a1260c5-7073-48d5-a61f-efa49dbe7f19
M. A. Howe #s.n. 00 March 1892
Porella cordaeana (Huebener) Moore
United States, California, Marin, Mill Valley

Academy of Natural Sciences of Drexel University
Catalog #: PH00144815
M. A. Howe #s.n. 00 March 1892
Porella platyphylla (L.) Pfeiff.
USA, California, Marin, Mill Valley

University of Colorado, Museum of Natural History
Catalog #: COLO-B-0044245
Marshall A Howe #s.n. 00 March 1892
Porella roellii Stephani
United States, California, Marin, Mill Valley

Michigan State University
Catalog #: MSC-B-0013120
Marshall A. Howe #s.n. 00 March 1892
Porella roellii Stephani
United States, California, Marin, Mill Valley

Michigan State University
Catalog #: MSC-B-0013119
Marshall A. Howe #s.n. 00 March 1892
Porella roellii Stephani
United States, California, Marin, Mill Valley

University of Colorado, Museum of Natural History
Catalog #: COLO-B-0044960
Marshall A. Howe #s.n. 00 March 1892
Porella cordaeana (Huebener) Moore
United States, California, Marin, Mill Valley

University of Wisconsin - Madison
Catalog #: WIS-B-0028214
Marshall A. Howe #s.n. 00 March 1892
Porella roellii Stephani
United States, California, Marin, Mill Valley

Yale University Herbarium, Peabody Museum of Natural History
Catalog #: YU.212155
urn:uuid:32dd66fe-9981-4234-af06-6015604d650b
Marshall Avery Howe s.n. 00 March 1892
Porella cordaeana (Huebener) Moore
United States of America, California, Marin, Mill Valley