TYPIFICATION OF LINNAEAN SPECIES OF POTAMOGETON (POTAMOGETONACEAE)

Abstract

SummaryTwelve species of Potamogeton were named by Linnaeus in Species Plantarum. Only one of these, P. pusillus, has previously been lectotypified, although Dandy noted his choice of types on sheets in the Clifford Herbarium at BM and in notes at LINN. Eight lectotypes and three neotypes are chosen for the eleven taxa for which lectotypes have not been published. Dandy's choice of the type for P. natans is rejected because it contradicts the distributional portion of the protologue. The remainder of his choices are accepted, including that of P. pusillus, this latter choice having caused considerable discussions in the literature.