Abstract
The type specimens ofP. malaianus Miquel collected byTeijsman are not identical withP. wrightii Morong, a species calledP. “malaianus” in Japan and elsewhere; they belong toP. nodosus. As a possible candidate for the correct name,P. sumatranus Miquel was studied: its exact identity, however, cannot be proved beyond doubt, even though the name refers at least partly toP. wrightii. That is whyPotamogeton wrightii Morong is proposed as the valid name of the species. A thorough description is provided including data on anatomy, morphology, life history, variability and ecology. A complete list of specimens, of synonyms and of misidentifications is given as well. The species shows a fuzzy structure with several special forms, intergrading hybrids; it is closely related with other taxa likeP. sumatranus. Still a great number of specimens cannot be assigned with certainty to any taxon.
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Wiegleb, G. A redescription ofPotamogeton wrightii (Potamogetonaceae). Pl Syst Evol 170, 53–70 (1990). https://doi.org/10.1007/BF00937849
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DOI: https://doi.org/10.1007/BF00937849