A list of additions to GREMMEN & KREMERS, The flora of the Netherlands, German and Danish Wadden islands (1971) is given. The names of the species, new for the Netherlands Wadden islands, are in bold type.

Gorteria Dutch Botanical Archives

CC BY 3.0 NL ("Naamsvermelding")

Naturalis Biodiversity Center

J. Mennema, & S.J. van Ooststroom. (1975). Aanvullende gegevens op Gremmen en Kremers, De flora van de Nederlandse, Duitse en Deense Waddeneilanden. Gorteria Dutch Botanical Archives, 7(9/10), 133–148.