| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer Edward Walter Hunnybun | Allan Octavian Hume | 7/8/1907 | SLBI |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 31/5/1887 | SLBI |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 7/10/1886 | SLBI |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer Edward Walter Hunnybun | Allan Octavian Hume | 7/8/1907 | SLBI |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 19/6/1888 | SLBI |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 23/7/1887 | SLBI |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer Henry Groves | Allan Octavian Hume Henry & James Groves | 12/7/1894 | SLBI |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Botanical Exchange Club of The British Isles | 13/6/1889 | SLBI |
| 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, Whittlesea,Blackbush Drain | Alfred Fryer | Botanical Exchange Club of The British Isles Allan Octavian Hume Frederick Townsend | 15/9/1894 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea,Blackbush Drain | Alfred Fryer | | 18/9/1894 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC29 Cambridgeshire, Whittlesea,Blackbush Drain | Alfred Fryer | | 18/9/1894 | SLBI |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer Edward Walter Hunnybun | Allan Octavian Hume | 7/8/1907 | SLBI |
| Potamogeton lucens | GB, VC31 Huntingdonshire, Earith | Alfred Fryer | William Hadden Beeby | 5/1884 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | VC29, Fortrey's Hall Farm | Alfred Fryer | | 24/9/1891 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | | Alfred Fryer | Alfred Fryer | 23/5/1880 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Block Fen, Chatteris | Alfred Fryer | Botanical Exchange Club of The British Isles William Hadden Beeby | 21/8/1886 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Blockmoor, Mepal | Alfred Fryer | Alfred Fryer | 25/7/1887 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Arthur Bennett | 8/1883 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | | 11/8/1886 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | William Hadden Beeby | 2/7/1884 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | William Hadden Beeby | 4/7/1884 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Alfred Fryer Nicholas Edward Brown | 8/1883 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris, Block Fen | Alfred Fryer | William Hadden Beeby | 11/8/1886 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris, West Moor | Alfred Fryer | William Hadden Beeby | 12/7/1887 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Doddington | Alfred Fryer | Alfred Fryer | 9/1885 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Doddington | Alfred Fryer | William Hadden Beeby | 9/1885 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alfred Fryer Arthur Bennett | 22/7/1890 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | William Hadden Beeby | 2/8/1887 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 22/7/1890 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | William Hadden Beeby | 5/8/1887 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Sutton | Alfred Fryer | | 29/5/1888 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Sutton | Alfred Fryer | | 29/5/1888 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Sutton | Alfred Fryer | | 11/8/1888 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | | 27/6/1884 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | | 7/1888 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | | 27/6/1884 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | | 23/8/1885 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | William Hadden Beeby | 27/7/1887 | SLBI |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | William Hadden Beeby | 27/6/1884 | SLBI |