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

University of Michigan Herbarium
Catalog #: 698537
M. A. Howe #s. n. 25 July 1894
Porella cordaeana (Huebener) Moore
USA, California, Sisson

University of Michigan Herbarium
Catalog #: 698538
M. A. Howe #s. n. 00 April 1894
Porella cordaeana (Huebener) Moore
USA, California, Berkeley

University of Michigan Herbarium
Catalog #: 698988
M. A. Howe #s. n. 25 July 1894
Porella rivularis (Nees) Pfeiff.
USA, California, Sisson, Berkeley

Southern Illinois University Herbarium
Catalog #: C0324773F
M. A. Howe #s.n.
Porella cordaeana (Huebener) Moore
United States, California, Siskiyou, A=Sisson; B=Berkeley in Alameda County

Michigan State University
Catalog #: MSC-B-0013057
Marshall A. Howe #s.n. 00 April 1894
Porella cordaeana (Huebener) Moore
United States, California, Alameda, Berkeley

University of Wisconsin - Madison
Catalog #: WIS-B-0029503
Marshall A. Howe #s.n. 00 April 1894
Porella cordaeana (Huebener) Moore
United States, California, B. Berkeley

Butler University, Friesner Herbarium
Catalog #: BUT-B-0700740
Marshall A. Howe #s.n. 25 July 1894
Porella cordaeana (Huebener) Moore
United States, California, Siskiyou, A. Sisson

Yale University Herbarium, Peabody Museum of Natural History
Catalog #: YU.212156
urn:uuid:ec63b63f-8913-488f-bb4a-cfcf32961fe9
Marshall Avery Howe s.n. 25 July 1894
Porella cordaeana (Huebener) Moore
United States of America, California, Siskiyou, Sisson; Sisson

Yale University Herbarium, Peabody Museum of Natural History
Catalog #: YU.212168
urn:uuid:8310e053-967b-47ec-b2c6-874d94d478e2
Marshall Avery Howe s.n. 25 July 1894
Porella cordaeana (Huebener) Moore
United States of America, California, Siskiyou, Sisson; Sisson

Yale University Herbarium, Peabody Museum of Natural History
Catalog #: YU.212169
urn:uuid:36e14ae5-84f7-4fb2-9f39-aa3b816eb76e
Marshall Avery Howe s.n. 00 April 1894
Porella cordaeana (Huebener) Moore
United States of America, California, Berkeley;

Yale University Herbarium, Peabody Museum of Natural History
Catalog #: YU.212157
urn:uuid:4018dbf2-92fe-4315-b5bb-6b279f510562
Marshall Avery Howe #B. 00 April 1894
Porella cordaeana (Huebener) Moore
United States of America, California, Berkeley;