| 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, Pirbright | William Hadden Beeby | Alfred Fryer Charles Bailey | 12/8/1888 | MANCH |
| 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,Blackbush Drain | Alfred Fryer | Alfred Fryer Charles Bailey | 16/8/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea,Blackbush Drain | Alfred Fryer | Alfred Fryer Charles Bailey | 22/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea,Blackbush Drain | Alfred Fryer | Alfred Fryer Charles Bailey | 25/6/1895 | MANCH |
+ | Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea,Blackbush Drain | Alfred Fryer | Botanical Exchange Club of The British Isles Charles Bailey | 25/6/1895 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC32 Northamptonshire, Peterborough, Borough Fen | George Claridge Druce | Druce Herbarium, Oxford Charles Bailey | 1/7/1910 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC54 North Lincolnshire, Belton | George Taylor | The British Museum | 2/8/1941 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC56 Nottinghamshire, Misson | J Brown | The British Museum | 7/5/1949 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC58 Cheshire, Hale Moss | | Charles Bailey | 7/1859 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC69 Westmorland, Eamont Bridge | Catherine Muriel Rob | | 18/9/1949 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC69 Westmorland, Low Wood | William Harold Pearsall | Botanical Exchange Club of The British Isles William Harold Pearsall | 16/8/1913 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC69 Westmorland, Ullswater | William Harold Pearsall | | 12/8/1919 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC81 Berwickshire, Coldingham | John Thomas Irvine Boswell-Syme | Botanical Society of Edinburgh Fletcher | 8/1848 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC88 Mid Perthshire, Perth | John Thomas Irvine Boswell-Syme | Charles Bailey | 9/1869 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC88 Mid Perthshire, River Tay | John Sim | Charles Bailey | 7/1865 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC88 Mid Perthshire, River Tay | John Sim | William Wilson | 7/1865 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC89 East Perthshire, Blairgowrie | John Lowell | | 17/8/1997 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC89 East Perthshire, Blairgowrie | John Lowell | | 17/8/1997 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC89 East Perthshire, Loch Clunie [Cluny] | Francis Druce | Charles Bailey Eyre de Crespigny | | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC89 East Perthshire, Loch Clunie [Cluny] | Abram Sturrock George Claridge Druce | | 7/1883 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC89 East Perthshire, Lunan Burn | Abram Sturrock | Arthur Bennett Charles Bailey | 18/8/1882 | MANCH |