| Potamogeton perfoliatus x crispus = P. x cooperi | Cultivated | Alfred Fryer | Charles Bailey | 27/8/1891 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | Cultivated | Alfred Fryer | Charles Bailey | 22/8/1891 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | Cultivated | Alfred Fryer | Alfred Fryer Charles Bailey | 31/8/1892 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC20 Hertfordshire, Tring | James Edgar Dandy | The British Museum | 14/8/1949 | MANCH |
| 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, VC55 Leicestershire, Loughborough | Albert Bruce Jackson | Botanical Exchange Club of The British Isles Albert Bruce Jackson Charles Bailey | 8/1898 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 24/7/1890 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Albert Bruce Jackson | Botanical Exchange Club of The British Isles Charles Bailey | 8/1898 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Albert Bruce Jackson | Albert Bruce Jackson Charles Bailey | 8/1898 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Edgar Franklin Cooper | Charles Bailey | 4/8/1890 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC55 Leicestershire, Loughborough | Edgar Franklin Cooper | Botanical Exchange Club of The British Isles Charles Bailey | 8/1891 | MANCH |
| 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 | Edgar Franklin Cooper | Botanical Exchange Club of The British Isles | 8/7/1892 | 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, Quorndon | Frances Louisa Foord-Kelcey | Botanical Exchange Club of The British Isles Manchester Museum Charles Bailey | 19/8/1907 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC56 Nottinghamshire, Wiseton,Drakeholes | George Taylor | | 2/8/1941 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC57 Derbyshire, Ockbrook | Alexander Cossart Hasse | Alexander Cossart Hasse | 6/1884 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC58 Cheshire, Chester | Christopher Robert Billups | Charles Bailey | 11/9/1891 | 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 | Charles Bailey | 24/7/1897 | MANCH |
| 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 (12 miles south of) | Christopher Robert Billups | | 11/9/1891 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC58 Cheshire, River Dee Cultivated | Alfred Fryer | Charles Bailey | 6/9/1890 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC64 Mid-west Yorkshire, Ilkley | Albert Wilson | | 8/1910 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC83 Midlothian, Union Canal | Robert Kidston | Botanical Exchange Club of The British Isles Charles Bailey | 1897 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | Robert Kidston | Botanical Exchange Club of The British Isles Charles Bailey | 1/9/1897 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | Robert Kidston | Alfred Fryer Charles Bailey | 1/9/1897 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | John Stirling Stirling Robert Kidston | Alfred Fryer Arthur Bennett | 8/1894 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | IE, VCH39 Co. Antrim, Templepatrick | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 8/1894 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | IE, VCH39 Co. Antrim, Templepatrick | Samuel Alexander Stewart | Charles Bailey Samuel Alexander Stewart | 10/8/1894 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | IE, VCH39 Co. Antrim, Templepatrick | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 10/8/1894 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | IE, VCH39 Co. Antrim, Templepatrick | Samuel Alexander Stewart | Manchester Museum Charles Bailey | 10/8/1894 | MANCH |