| Potamogeton pusillus | GB, VC27 East Norfolk, Norfolk Broads | Charles Edward Moss | Alfred Fryer Charles Bailey | 23/8/1909 | MANCH |
| Potamogeton pusillus | GB, VC33 East Gloucestershire, Stroud | Alfred Fryer | | 6/1900 | MANCH |
+ | Potamogeton praelongus | GB, VC28 West Norfolk, Welney | Alfred Fryer | Botanical Exchange Club of The British Isles Charles Bailey | 25/9/1884 | MANCH |
| Potamogeton praelongus | GB, VC28 West Norfolk, Welney | | Alfred Fryer | 25/9/1884 | SLBI |
| Potamogeton praelongus | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Augustin Ley | 5/4/1890 | BIRM |
+ | Potamogeton praelongus | GB, VC29 Cambridgeshire, Ely | Alfred Fryer | Alfred Fryer Charles Bailey | 11/9/1883 | MANCH |
| Potamogeton praelongus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 5/10/1884 | SLBI |
| Potamogeton praelongus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 28/6/1888 | ABS |
| Potamogeton praelongus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Augustin Ley | 28/6/1888 | BIRM |
+ | Potamogeton praelongus | GB, VC29 Cambridgeshire, Reach Lode | Alfred Fryer | Alfred Fryer Charles Bailey | 13/9/1894 | MANCH |
+ | Potamogeton praelongus | GB, VC29 Cambridgeshire, Reach Lode | Alfred Fryer | Alfred Fryer Charles Bailey | 13/9/1894 | MANCH |
+ | Potamogeton praelongus | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Alfred Fryer Charles Bailey | 30/5/1886 | MANCH |
+ | Potamogeton praelongus | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Charles Bailey | 6/9/1886 | MANCH |
| Potamogeton praelongus | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | William Hadden Beeby | 25/9/1884 | SLBI |
| Potamogeton praelongus | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | | 28/5/1885 | SLBI |
| Potamogeton praelongus | GB, VC31 Huntingdonshire, River Ouse | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 28/8/1884 | BIRM |
+ | Potamogeton praelongus | GB, VC31 Huntingdonshire, Saint Ives | Alfred Fryer | Botanical Exchange Club of The British Isles Charles Bailey | 28/8/1884 | MANCH |
| Potamogeton praelongus | GB, VC31 Huntingdonshire, Saint Ives Thicket | Alfred Fryer | Botanical Exchange Club of The British Isles | 28/8/1884 | ABS |
+ | Potamogeton praelongus | IE, VCH39 Co. Antrim, Belfast,Lagan Canal | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 23/6/1873 | MANCH |
+ | Potamogeton praelongus | IE, VCH39 Co. Antrim, Rathlin Island,Ushet Lough | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 4/8/1882 | MANCH |
| Potamogeton polygonifolius | GB, VC28 West Norfolk, Dersingham Fen | Alfred Fryer | Alfred Fryer Charles Bailey | 29/9/1894 | MANCH |
| Potamogeton polygonifolius | GB, VC28 West Norfolk, Dersingham Moor | Alfred Fryer | Alfred Fryer Charles Bailey | 29/9/1894 | MANCH |
| Potamogeton polygonifolius | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | | 30/8/1887 | SLBI |
| Potamogeton polygonifolius | GB, VC58 Cheshire, Macclesfield | Kirby Trimmer | Alfred Fryer Charles Bailey | | MANCH |
| Potamogeton polygonifolius | GB, VC86 Stirlingshire, Killearn | John Stirling Stirling Robert Kidston | Alfred Fryer | 2/8/1897 | E |
| Potamogeton polygonifolius | GB, VC92 South Aberdeenshire, Muir of Dinnet | Herbert Decimus Geldart | Alfred Fryer Charles Bailey | 28/7/1888 | MANCH |
| Potamogeton polygonifolius | GB, VC100 Clyde Islands, Loch Nuis | Alexander Somerville | The British Museum Alfred Fryer | 22/8/1894 | E |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC29 Cambridgeshire, Parson Ware Drove, Benwick | Alfred Fryer Christopher Robert Billups | Alfred Fryer Charles Bailey | 28/7/1892 | MANCH |
+ | Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC29 Cambridgeshire, Parson Ware Drove, Benwick | Alfred Fryer | | 28/7/1892 | BIRM |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC29 Cambridgeshire, Parson Ware Drove, Benwick | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 28/7/1892 | BIRM |
+ | Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC29 Cambridgeshire, Parson Ware Drove, Benwick | Alfred Fryer | | 22/8/1892 | BIRM |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC29 Cambridgeshire, Parson Ware Drove, Benwick | Alfred Fryer | Augustin Ley | 22/8/1892 | BIRM |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Edgar Franklin Cooper | Alfred Fryer Frederick Thompson Mott Charles Bailey | 7/1885 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Edgar Franklin Cooper | Alfred Fryer Charles Bailey | 7/1885 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Alfred Fryer | Charles Bailey Edgar Franklin Cooper | 11/9/1890 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Edgar Franklin Cooper | Alfred Fryer Charles Bailey | 23/7/1897 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Alfred Fryer E F Cooper | Botanical Exchange Club of The British Isles Augustin Ley | 8/1891 | BIRM |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC58 Cheshire, Chester Cultivated | Alfred Fryer | Charles Bailey | 29/7/1890 to 4/8/1890 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC58 Cheshire, Chester | Christopher Robert Billups | Alfred Fryer Charles Bailey | 24/7/1897 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC58 Cheshire, Chester | Christopher Robert Billups | Alfred Fryer | 8/1889 | SLBI |