| Potamogeton obtusifolius | GB, VC59 South Lancashire, Reddish | Charles Bailey | Charles Bailey | 14/9/1883 9/9/1885 | MANCH |
| Potamogeton obtusifolius | GB, VC59 South Lancashire, Withington | | John Bland Wood | | MANCH |
| Potamogeton obtusifolius | GB, VC58,VC59, Reddish | John Norton Mills | John Norton Mills | 9/10/1950 | MANCH |
| Potamogeton obtusifolius | GB, VC60 West Lancashire, Catterall | Albert Wilson | Alfred Fryer Charles Bailey | 8/1899 | MANCH |
| Potamogeton obtusifolius | GB, VC60 West Lancashire, Garstang | Albert Wilson | Alfred Fryer Charles Bailey | 8/1899 | MANCH |
| Potamogeton obtusifolius | GB, VC60 West Lancashire, Grimsargh | James Alfred Wheldon | Charles Bailey James Alfred Wheldon | 8/1900 | MANCH |
| Potamogeton obtusifolius | GB, VC60 West Lancashire, Preston | James Edgar Dandy | The British Museum | 28/6/1946 | MANCH |
| Potamogeton obtusifolius | GB, VC62 North-east Yorkshire, Scarborough | James Ward | Richmond Museum Charles Bailey | 7/1862 | MANCH |
| Potamogeton obtusifolius | GB, VC62 North-east Yorkshire, Thirsk, Busby Stoop | Douglas Montague Heath | Douglas Montague Heath | 27/7/1938 | BIRM |
| Potamogeton obtusifolius | GB, VC67 South Northumberland, Crag Lough | George Taylor | The British Museum | 29/9/1944 | MANCH |
| Potamogeton obtusifolius | GB, VC69 Westmorland, Blelham Tarn | William Harrison Pearsall | Arthur Bennett Harold Stuart Thompson | 8/1915 | BIRM |
| Potamogeton obtusifolius | GB, VC69 Westmorland, Esthwaite Water | Denis John Carr | University of Manchester | 7/1948 | ABS |
| Potamogeton obtusifolius | GB, VC69 Westmorland, Esthwaite Water | Denis John Carr | University of Manchester | 7/1948 | ABS |
| Potamogeton obtusifolius | GB, VC69 Westmorland, Esthwaite Water | Douglas Montague Heath | Douglas Montague Heath | 8/9/1936 | BIRM |
| Potamogeton obtusifolius | GB, VC69 Westmorland, Esthwaite Water | William Harold Pearsall | | 20/8/1919 | MANCH |
| Potamogeton obtusifolius | GB, VC69 Westmorland, Hawes Water | William Harold Pearsall | Botanical Exchange Club of The British Isles Charles Bailey William Harold Pearsall | 28/8/1915 | MANCH |
| Potamogeton obtusifolius | GB, VC72 Dumfriesshire, Thornhill | James Fingland | Charles Bailey Eyre Champion de Crespigny James Fingland | 7/1888 | MANCH |
| Potamogeton obtusifolius | GB, VC77 Lanarkshire, Glasgow, Possil Marsh | Richard McKay | | 6/1868 | MANCH |
| Potamogeton obtusifolius | GB, VC77 Lanarkshire, Hogganfield Loch | George Taylor Robert MacKechnie | The British Museum | 9/9/1945 | SLBI |
| Potamogeton obtusifolius | GB, VC77 Lanarkshire, Steps | George Taylor Robert MacKechnie | The British Museum | 9/9/1945 | SLBI |
| Potamogeton obtusifolius | GB, VC80 Roxburghshire, Kelso | Andrew Brotherston | George Stephen West | 9/1874 | BIRM |
| Potamogeton obtusifolius | GB, VC81 Berwickshire, Gordon Moss | Robert Renton | George Stephen West | 8/1881 | BIRM |
| Potamogeton obtusifolius | GB, VC86 Stirlingshire, Coulterhouse Dam | John Stirling Stirling Robert Kidston | Alfred Fryer Charles Bailey | 1886 | MANCH |
| Potamogeton obtusifolius | GB, VC86 Stirlingshire, Mugdock | John C Hutcheson | Croydon Natural History and Scientific Society Henry Franklin Parsons | 1/8/1868 | SLBI |
| Potamogeton obtusifolius | GB, VC87 West Perthshire, Culross | Tom Drummond | Charles Bailey John Harbord Lewis | 7/8/1875 | MANCH |
| Potamogeton obtusifolius | GB, VC87 West Perthshire, Culross | Tom Drummond | | 7/8/1875 | BON |
| Potamogeton obtusifolius | GB, VC88 Mid Perthshire, Bennybeg Pond | Robert Kidston | Robert Kidston | 8/9/1884 | DBC |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, Loch Clunie [Cluny] | Job Edward Lousley | Job Edward Lousley | 11/8/1932 | SLBI |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, Loch Clunie [Cluny] | Job Edward Lousley | | 11/8/1932 | SLBI |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, Marlee Loch | Abram Sturrock | Arthur Bennett Charles Bailey | 8/8/1882 | MANCH |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, Marlee Loch | Abram Sturrock | Arthur Bennett Charles Bailey | 11/9/1882 | MANCH |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, Marlee Loch | Charles Geekie Matthew William Barclay | Arthur Bennett | 8/1914 | MANCH |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, Marlee Loch | Abram Sturrock | Botanical Exchange Club of The British Isles Arthur Bennett Augustin Ley | 11/9/1882 | BIRM |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, Marlie Loch | Edward Shearburn Marshall | | 9/7/1906 | SLBI |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, White Loch | John Lowell | | 17/8/1997 | MANCH |
| Potamogeton obtusifolius | GB, VC90 Angus, Rescobie | J Luns | | 1848 | BON |
| Potamogeton obtusifolius | GB, VC90 Angus, Rescobie Loch | Edward Shearburn Marshall | Harold Stuart Thompson | 18/7/1892 | BIRM |
| Potamogeton obtusifolius | GB, VC91 Kincardineshire, Loch of Drum | | Fletcher | 8/1849 | MANCH |
| Potamogeton obtusifolius | GB, VC92 South Aberdeenshire, Loch Kinord | George William Traill | Botanical Exchange Club of The British Isles Arthur Bennett | 8/1883 | MANCH |
| Potamogeton obtusifolius | GB, Ambiguous locality (GB), Withington | | | | BON |
| Potamogeton obtusifolius | GB, VC105 West Ross & Cromarty, Loch Clunie | Job Edward Lousley | Job Edward Lousley | 11/8/1932 | SLBI |
| Potamogeton obtusifolius | GB, Loch S | Edward Shearburn Marshall | William Hadden Beeby | | SLBI |
| Potamogeton obtusifolius | IE, VCH2 North Kerry, Muckross | George Claridge Druce | Botanical Exchange Club of The British Isles Job Edward Lousley J H Chapple | 9/1922 | SLBI |
| Potamogeton obtusifolius | IE, VCH22 Meath, Breakey Lough | Robert Lloyd Praeger | Robert Lloyd Praeger | 24/9/1903 | DBC |
| Potamogeton obtusifolius | IE, VCH38 Co. Down, Comber | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 27/7/1884 | MANCH |
| Potamogeton obtusifolius | IE, VCH38 Co. Down, Killaney | Henry William Lett | Croydon Natural History and Scientific Society Henry Franklin Parsons Henry William Lett | 18/8/1896 | SLBI |
| Potamogeton obtusifolius | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Coslett Herbert Waddell Harold Stuart Thompson | 9/1896 | BIRM |