Tilden, Amer. Algae
Tilden, J.E. [1-650]

Michigan State University Algae
Catalog #: MSC0182838
A.P. Anderson #s.n. 17 August 1892
Gomphonema olivaceum (Hornemann) Kützing
United States, Upper Mississippi river

Miami University - Algae
Catalog #: 000179198
A.P. Anderson #s.n. 17 August 1892
Gomphonema olivaceum (Hornemann) Kützing
United States, Upper Mississippi river

Michigan State University Algae
Catalog #: MSC0182837
Conway MacMillan #s.n. 00 April 1895
Gomphonema olivaceum (Hornemann) Kützing
United States, Minnesota, Hennepin, Mississippi river, Minneapolis