| Potamogeton lucens x gramineus = P. x zizii | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Charles Bailey | 4/7/1884 | BIRM |
+ | Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Fortrey's Hall | Alfred Fryer | | 14/8/1887 | BIRM |
+ | Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Fortrey's Hall | Alfred Fryer | | 31/5/1888 | BIRM |
+ | Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Fortrey's Hall | Alfred Fryer | | 19/5/1888 | BIRM |
| Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Fortrey's Hall | Alfred Fryer | Augustin Ley | 19/5/1888 | BIRM |
| Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Fortrey's Hall | Alfred Fryer | Augustin Ley | 31/5/1888 | BIRM |
+ | Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | | 7/9/1897 | BIRM |
| Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer G F Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 7/9/1897 | BIRM |
+ | Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | | 27/6/1884 | BIRM |
| Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Arthur Bennett Augustin Ley | 14/8/1887 | BIRM |
| Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 27/6/1884 | BIRM |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 25/9/1892 | BIRM |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Augustin Ley | 13/8/1891 | BIRM |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Augustin Ley | 16/7/1890 | BIRM |
| Potamogeton natans x lucens = P. x fluitans | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Augustin Ley | 7/7/1890 | BIRM |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Ramsey Cultivated | Alfred Fryer | Augustin Ley | 29/7/1888 | BIRM |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Ramsey Cultivated | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 25/7/1888 | BIRM |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Ramsey Cultivated | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 10/7/1888 | BIRM |
| Potamogeton natans x lucens = P. x fluitans | GB, VC31 Huntingdonshire, Warboys | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 30/7/1897 | BIRM |
| Potamogeton pectinatus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Alfred Fryer Charles Bailey | 7/9/1897 | BIRM |
| Potamogeton pectinatus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 15/7/1887 | BIRM |
| Potamogeton pectinatus | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 12/8/1887 to 22/8/1887 | BIRM |
| Potamogeton pectinatus | GB, VC29 Cambridgeshire, Welches Dam | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 12/8/1887 | BIRM |
| Potamogeton pectinatus | GB, VC31 Huntingdonshire, Ramsey | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 21/8/1885 | BIRM |
| Potamogeton perfoliatus | GB, VC29,VC31, Old Bedford River | Alfred Fryer | Augustin Ley | 25/5/1888 | BIRM |
+ | 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 | | 22/8/1892 | 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 | Augustin Ley | 22/8/1892 | BIRM |
| 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, River Dee Cultivated | Alfred Fryer | Augustin Ley | 31/8/1892 | BIRM |
+ | Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC58 Cheshire, River Dee 12 miles above Chester | Alfred Fryer | | 31/8/1892 | BIRM |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | John Stirling Stirling Robert Kidston | Augustin Ley Alfred Fryer | 8/8/1892 | BIRM |
| Potamogeton praelongus | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Augustin Ley | 5/4/1890 | BIRM |
| Potamogeton praelongus | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | Augustin Ley | 28/6/1888 | BIRM |
| Potamogeton praelongus | GB, VC31 Huntingdonshire, River Ouse | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 28/8/1884 | BIRM |
| Potamogeton pusillus | GB, VC27 East Norfolk, Barton Broad | Charles Edward Moss | Alfred Fryer Charles Bailey | 8/1909 | BIRM |
| Selinum carvifolia | GB, VC29 Cambridgeshire, Chippenham | Alfred Fryer | Botanical Exchange Club of The British Isles Charles Bailey | 5/9/1884 | BIRM |
| Selinum carvifolia | GB, VC29 Cambridgeshire, Chippenham Moor | Alfred Fryer | Botanical Exchange Club of The British Isles Charles Bailey | 26/8/1884 | BIRM |
| Viola canina subsp. montana | GB, VC29 Cambridgeshire, Chatteris | Alfred Fryer | Botanical Exchange Club of The British Isles Augustin Ley | 16/6/1885 | BIRM |