| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alexander Somerville | 10/7/1890 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 10/7/1890 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alfred Fryer | 13/7/1890 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Royal Botanic Gardens, Kew | 13/7/1890 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 8/8/1891 | E |
| Potamogeton lucens | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alexander Somerville | 28/9/1891 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alexander Somerville | 17/8/1892 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 17/8/1892 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alexander Somerville Alfred Fryer | 7/10/1894 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Sutton | Alfred Fryer | | 11/10/1887 | E |
| Potamogeton coloratus | GB, VC29 Cambridgeshire, Sutton | Alfred Fryer | | 7/5/1888 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Sutton | Alfred Fryer | | 3/7/1888 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Sutton Gault | Alfred Fryer | Alfred Fryer | 8/7/1888 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Arthur Bennett | 8/1883 | E |
| Potamogeton lucens x gramineus = P. x zizii | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Arthur Bennett | 8/1883 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Alfred Fryer | 1/7/1885 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Alfred Fryer | 4/8/1886 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Alexander Somerville | 27/7/1887 | E |
| Potamogeton coloratus | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | | 23/1/1888 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Witcham Meadlands | Alfred Fryer | | 19/8/1887 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Witcham Meadlands | Alfred Fryer | Alexander Somerville | 20/8/1887 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Witcham Meadlands | Alfred Fryer | Alexander Somerville | 25/8/1888 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Witcham Meadlands | Alfred Fryer G Fryer | Alexander Somerville | 27/8/1888 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Witcham Meadlands | Alfred Fryer | | 13/8/1892 | E |
| Potamogeton gramineus | GB, VC29 Cambridgeshire, Witcham Meadlands | Alfred Fryer | Alexander Somerville | 10/9/1892 | E |
| Potamogeton coloratus | GB, VC29 Cambridgeshire, Witchford | Alfred Fryer | Alexander Somerville | 1/10/1892 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Pidley Fen | Alfred Fryer | | 4/10/1891 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Pidley Fen | Alfred Fryer | | 11/10/1891 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Pidley Fen, Cross Drove | Alfred Fryer | | 21/6/1888 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Alfred Fryer | 23/7/1887 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 30/8/1887 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Ramsey Cultivated | Alfred Fryer | Royal Botanic Gardens, Kew | 7/7/1888 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 21/7/1888 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Alfred Fryer | 21/7/1888 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Ramsey Cultivated | Alfred Fryer | Alexander Somerville | 23/7/1888 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Ramsey Cultivated | Alfred Fryer | Royal Botanic Gardens, Kew | 29/7/1888 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Ramsey Cultivated | Alfred Fryer | Alfred Fryer | 30/7/1888 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Alfred Fryer | 13/6/1889 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 11/8/1889 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Alexander Somerville | 31/8/1894 | E |