+ | Potamogeton praelongus | GB, VC19 North Essex, Kelvedon | Ezekiel George Varenne | Charles Bailey | 1867 | MANCH |
+ | Potamogeton praelongus | GB, VC23 Oxfordshire, Blenheim Park | James Edgar Dandy | British Museum (Natural History) The British Museum | 12/8/1949 | MANCH |
+ | Potamogeton praelongus | GB, VC23 Oxfordshire, Reading,Caversham | | Warrington Museum William Wilson | | MANCH |
+ | Potamogeton praelongus | GB, VC25 East Suffolk, Bungay | Felt | John Bland Wood | 6/1843 | MANCH |
+ | Potamogeton praelongus | GB, VC25 East Suffolk, River Waveney | Daniel Stock | Charles Bailey William Lowndes Notcutt | 6/1841 | MANCH |
+ | Potamogeton praelongus | GB, VC27 East Norfolk, River Yare | Arthur Bennett | Charles Bailey | 3/8/1880 | MANCH |
+ | Potamogeton praelongus | GB, VC27 East Norfolk, Salhouse | C Cotton | Charles Bailey T A & C Cotton | 6/1890 | 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, VC29 Cambridgeshire, Ely | Alfred Fryer | Alfred Fryer Charles Bailey | 11/9/1883 | MANCH |
+ | 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, Wicken Lode | Arthur Humble Evans | | 7/10/1909 | MANCH |
+ | 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, VC40 Shropshire, Ellesmere,White Mere | William Edmund Beckwith | Charles Bailey Arthur Bennett | 10/1882 | MANCH |
+ | Potamogeton alpinus x praelongus = P. x griffithii | GB, VC49 Caernarvonshire, Aber | John Edwards Griffith | Charles Bailey | 28/7/1884 | MANCH |
| Potamogeton alpinus x praelongus = P. x griffithii | GB, VC49 Caernarvonshire, Llyn Anafon | John Edwards Griffith | Charles Bailey John Edwards Griffith | 7/1882 | MANCH |
| Potamogeton alpinus x praelongus = P. x griffithii | GB, VC49 Caernarvonshire, Llyn Anafon | John Edwards Griffith | Charles Bailey Arthur Bennett | 8/1882 | MANCH |
| Potamogeton alpinus x praelongus = P. x griffithii | GB, VC49 Caernarvonshire, Llyn Anafon | Charles Bailey | Charles Bailey | 29/9/1884 | MANCH |
| Potamogeton alpinus x praelongus = P. x griffithii | GB, VC49 Caernarvonshire, Llyn Anafon | John Edwards Griffith | Botanical Exchange Club of The British Isles Charles Bailey | 6/1887 | MANCH |
| Potamogeton alpinus x praelongus = P. x griffithii | GB, VC49 Caernarvonshire, Llyn Anafon | John Edwards Griffith | Botanical Exchange Club of The British Isles Elizabeth Anne Lomax | 28/7/1884 | MANCH |
+ | Potamogeton praelongus | GB, VC53 South Lincolnshire, Lincoln | | Fletcher | | MANCH |
+ | Potamogeton praelongus x perfoliatus = P. x cognatus | GB, VC54 North Lincolnshire, Belton | John Martin Taylor | British Museum (Natural History) The British Museum | 22/12/1943 | MANCH |
+ | Potamogeton praelongus x perfoliatus = P. x cognatus | GB, VC54 North Lincolnshire, Belton | John Martin Taylor | British Museum (Natural History) Flora of Leicestershire (1886) | 3/7/1944 | MANCH |
+ | Potamogeton praelongus x perfoliatus = P. x cognatus | GB, VC54 North Lincolnshire, Belton | John Martin Taylor | The British Museum | 3/7/1944 | MANCH |
+ | Potamogeton praelongus | GB, VC57 Derbyshire, Willington | | William Hunt Painter | 30/6/1890 | MANCH |
+ | Potamogeton praelongus | GB, VC58 Cheshire, Quoisley | George Taylor | British Museum (Natural History) The British Museum | 5/9/1947 | MANCH |
| Potamogeton praelongus | GB, VC58 Cheshire, Rostherne | John Bland Wood | John Bland Wood | | MANCH |
+ | Potamogeton praelongus | GB, VC64 Mid-west Yorkshire, Settle (E of),Malham | John Windsor | Charles Bailey | 7/7/1865 | MANCH |
+ | Potamogeton praelongus | GB, VC69 Westmorland, Grasmere Lake | Henry Elliott Fox | Charles Bailey Eyre Champion de Crespigny | 8/1890 | MANCH |
+ | Potamogeton praelongus | GB, VC69 Westmorland, Patterdale | Robert Davies | Warrington Museum Robert Davies | 8/7/1857 | MANCH |
+ | Potamogeton praelongus | GB, VC69 Westmorland, Windermere | | Charles Bailey Charles Bailey | 25/7/1885 | MANCH |
+ | Potamogeton praelongus | GB, VC85 Fifeshire, Kinghorn Loch | John Thomas Irvine Boswell-Syme | London Botanical Exchange Club Charles Bailey | 7/1872 | MANCH |
+ | Potamogeton praelongus | GB, VC85 Fifeshire, Kinghorn Loch | John Thomas Irvine Boswell-Syme | Charles Bailey | 1873 | MANCH |
+ | Potamogeton praelongus | GB, VC88 Mid Perthshire, Loch Kinardochy | John Lowell | John Lowell | 18/8/1997 | MANCH |
+ | Potamogeton praelongus | GB, VC90 Angus, Rescobie | | Arthur Henfrey Charles Bailey William Lowndes Notcutt | | MANCH |
+ | Potamogeton praelongus | GB, VC96 East Inverness-shire, Nairnshire,Loch Lee | William Alexander Stables | Warrington Museum William Wilson | | MANCH |
+ | Potamogeton praelongus | IE, VCH22 Meath, Navan | Charles Bailey | Charles Bailey Charles Bailey | 15/9/1879 | MANCH |
+ | Potamogeton praelongus | IE, VCH39 Co. Antrim, Belfast,Lagan Canal | Samuel Alexander Stewart | Charles Bailey James Ward | 2/7/1866 | MANCH |
+ | 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 |