In September 1984 and in August and September 1985 the supposed hybrid between Potamogeton acutifolius Link and P. berchtoldii Fieber (P. X sudermanicus Hagström) was found in a ditch near Meppel in the Dutch province of Overijssel. This hybrid was not yet known from the Netherlands.

Gorteria Dutch Botanical Archives

CC BY 3.0 NL ("Naamsvermelding")

Naturalis Biodiversity Center

D.T.E. van der Ploeg. (1987). Potamogeton x sudermanicus Hagström, de vermoedelijke bastaard van P. acutifolius Link en P. berchtoldii Fieber, in Nederland gevonden. Gorteria Dutch Botanical Archives, 13(7), 173–176.