| Potamogeton gramineus x perfoliatus = P. x nitens | DE, Schleswig-Holstein, Holstein | Ernst Ferdinand Nolte | Allan Octavian Hume Frederick Townsend | | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC4 North Devon, Saint Giles | William Philip Hiern | Augustin Ley | 12/8/1905 | BIRM |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Aldershot | William Hadden Beeby | William Hadden Beeby | 31/7/1881 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Brookwood | Ernest Straker | Arthur Bennett William Hadden Beeby | 7/1883 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Cowshot | William Hadden Beeby | Croydon Natural History and Scientific Society | 10/6/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Cowshot | William Hadden Beeby | William Hadden Beeby | 10/6/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Cowshot | William Hadden Beeby | William Hadden Beeby | 12/8/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Cowshot | William Hadden Beeby | William Hadden Beeby | 10/6/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Frimley | Arthur Bennett | Botanical Exchange Club of The British Isles Charles Bailey Eyre Champion de Crespigny | 8/1888 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Frimley | Arthur Bennett | Botanical Exchange Club of The British Isles Charles Bailey | 8/1888 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Frimley | William Hadden Beeby | Alfred Fryer Charles Bailey | 12/8/1888 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Frimley | William Hadden Beeby | | 12/8/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Frimley | Arthur Bennett | Botanical Exchange Club of The British Isles Augustin Ley | 8/1888 | BIRM |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Mytchett Lake | William Hadden Beeby | | 12/8/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Pirbright | William Hadden Beeby | Alfred Fryer Charles Bailey | 12/8/1888 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Pirbright | William Hadden Beeby | William Hadden Beeby | 16/6/1889 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Pirbright | William Hadden Beeby | Augustin Ley | 16/6/1889 | BIRM |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Woking | William Hadden Beeby | William Hadden Beeby | 1/7/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Woking,Basingstoke Canal | William Hadden Beeby | William Hadden Beeby | 10/6/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC12,VC17, Frimley | Arthur Bennett | Croydon Natural History and Scientific Society | 8/1888 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC12,VC17, Frimley | Edward Charles Wallace | Watson Botanical Exchange Club Edward Charles Wallace Harold Stuart Thompson W H Pearsall | 13/9/1931 | BIRM |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Blackbush Drain | Alfred Fryer | Allan Octavian Hume Arthur Bennett | 18/9/1894 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Blackbush Drain, Pondersbridge, Wittlesey | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 15/9/1894 | BIRM |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 15/9/1894 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 25/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Botanical Exchange Club of The British Isles Charles Bailey | 15/9/1894 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Charles Bailey | 18/9/1894 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer | 16/8/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 11/9/1894 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Botanical Exchange Club of The British Isles Charles Bailey | 18/8/1894 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Botanical Exchange Club of The British Isles Charles Bailey | 18/9/1894 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 22/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 22/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 25/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 25/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 16/8/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 16/8/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 25/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Alfred Fryer Charles Bailey | 25/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea | Alfred Fryer | Harold Stuart Thompson | 15/9/1894 | BIRM |