| Potamogeton gramineus | GB, VC31 Huntingdonshire, Pidley Fen, Cross Drove | Alfred Fryer | | 21/6/1888 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Alexander Somerville | 31/8/1894 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Arthur Bennett | 31/8/1894 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer Edward Walter Hunnybun | Botanical Exchange Club of The British Isles Francis Chalmers Crawford Spencer Henry Bickham | 7/8/1907 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 30/8/1887 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 21/7/1888 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Alfred Fryer | 23/7/1887 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 11/8/1889 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Alfred Fryer | 13/6/1889 | E |
| Potamogeton gramineus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Alfred Fryer | 21/7/1888 | E |
| Potamogeton gramineus | IE, VCH22 Meath, Navan | Reginald Wiliam Scully | Reginald Wiliam Scully Alfred Fryer | 30/8/1893 | E |
| Potamogeton lucens | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alexander Somerville | 28/6/1888 | E |
| Potamogeton lucens | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alexander Somerville | 28/9/1891 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Benwick | Alfred Fryer | Alexander Somerville | 3/9/1892 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Block Fen, Chatteris | Alfred Fryer | Alexander Somerville | 29/7/1887 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Block Fen, Chatteris | Alfred Fryer | Alfred Fryer | 5/8/1887 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Block Fen, Chatteris | Alfred Fryer | Alfred Fryer | 18/7/1887 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Alexander Somerville Reginald Wiliam Scully | 22/8/1890 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Chatteris, Block Fen | Alfred Fryer | Alfred Fryer | 10/7/1887 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Doddington | Alfred Fryer | Alfred Fryer | 22/8/1886 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Fortrey's Hall | Alfred Fryer | Alexander Somerville Alfred Fryer | 27/7/1890 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Sutton | Alfred Fryer | | 11/10/1887 | 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 | Arthur Bennett | 8/1883 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Alexander Somerville | 27/7/1887 | 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, 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 lucens x gramineus = P. x zizii | GB, VC29 Cambridgeshire, Doddington | Alfred Fryer | Alfred Fryer | 19/7/1887 | E |
| Potamogeton lucens x gramineus = P. x zizii | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Arthur Bennett | 8/1883 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Alfred Fryer | 25/9/1892 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Arthur Bennett | 25/9/1892 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alfred Fryer | 7/7/1890 | E |
| 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 | 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 | | 10/7/1890 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 7/7/1890 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 8/8/1891 | E |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Ramsey Cultivated | Alfred Fryer | Alexander Somerville | 23/7/1888 | E |