RijksHerbarium & Delta Institute for Hydrobiological Research [? - ?]

University of North Carolina at Chapel Hill Herbarium; Max & Fran Hommersand Algae Herbarium: Algae
Catalog #: NCU-A-0024390
R. H. [Rijksherbarium, Leiden] #18 15 January 1975
Polysiphonia nigrescens (Hudson) Greville ex Harvey
Netherlands, Zuid-Holland, Goeree-Overflakkee, Nederland, Zuid-Holland, Goeree-Overflakkee, Ouddorp

University of North Carolina Wilmington, David J. Sieren Herbarium
Catalog #: WNC-A-0005842
R. H. [Rijksherbarium, Leiden] #s.n. 15 January 1975
Polysiphonia nigrescens (Hudson) Greville ex Harvey
Netherlands, Zuid-Holland, Goeree-Overflakkee, Ouddorp; Goeree-Overflakkee, Ouddorp