| Callitriche hermaphroditica | GB, VC52 Anglesey, Llanfaelog | John P Savidge | | 2/1/1956 | ABS |
| Callitriche hermaphroditica | GB, VC60 West Lancashire, Thurnham | John P Savidge | | 19/9/1956 | ABS |
| Callitriche hermaphroditica | GB, Lancashire, Thurnham | John P Savidge | John P Savidge | 11/9/1956 | ABS |
| Callitriche autumnalis | GB, VC92 South Aberdeenshire, Loch of Park | Thomas Robertson Sim | George Stephen West | 9/1878 | BIRM |
| Callitriche autumnalis | GB, VC89 East Perthshire, Stormont Loch | Cecil Ivry Sandwith Noel Yvri Sandwith | | 31/7/1936 | K |
| Callitriche autumnalis | GB, VC85 Fifeshire, Kinross | Ernest Stanley Salmon | Ernest Stanley Salmon | 9/1896 | K |
| Callitriche autumnalis | GB, VC85 Fifeshire, Kinross | Ernest Stanley Salmon | Ernest Stanley Salmon | 9/1896 | K |
| Callitriche autumnalis | GB, VC85 Fifeshire, Kinross | Ernest Stanley Salmon | Ernest Stanley Salmon | 9/1896 | K |
| Callitriche autumnalis | GB, VC85 Fifeshire, Kinross | Ernest Stanley Salmon | Ernest Stanley Salmon | 9/1896 | SHYB |
| Callitriche autumnalis | GB, Wales | Anna Russell | Shrewsbury Public Library Thomas Butler | 1837 | K |
| Callitriche hermaphroditica | IE, VCH39 Co. Antrim, Toome | Robert Lloyd Praeger | Robert Lloyd Praeger | 6/1893 | DBC |
| Callitriche hermaphroditica | IE, VCH2 North Kerry, KIllarney lakes | Robert Albert Phillips | Allan Octavian Hume | 7/1899 | SLBI |
| Callitriche hermaphroditica | GB, VC52 Anglesey, Valley | Reginald William Phillips | Albert Bruce Jackson | 9/1892 | K |
| Callitriche hermaphroditica | GB, Lancashire, Lytham | | Moon | 1883 | MANCH |
| Callitriche autumnalis | GB, VC72 Dumfriesshire, Mouswald | Edgar Wolston Bertram Handsley Milne-Redhead | | 6/8/1957 | K |
| Callitriche autumnalis | GB, VC60 West Lancashire, Carnforth | Henry Tuke Mennell | Ernest Stanley Salmon | 8/1891 | SHYB |
+ | Callitriche hermaphroditica | GB, VC88 Mid Perthshire, White Moss | Robert Hunt Meldrum | | 19/8/1886 | PTH |
| Callitriche autumnalis | GB, VC89 East Perthshire, Loch of Clunie | W McIvor | | 8/1847 | K |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Marlee Loch | Edward Shearburn Marshall | | 19/7/1892 | PTH |
| Callitriche autumnalis | GB, VC112 Shetland, Loch of Asta | Job Edward Lousley | Job Edward Lousley | 27/7/1950 | K |
| Callitriche autumnalis | GB, VC40 Shropshire, Sharpstones Hill | William Allport Leighton | George Lloyd | 8/1837 | K |
| Callitriche autumnalis | GB, VC80 Roxburghshire, Yetholm Loch | Andrew Brotherston | Botanical Exchange Club of The British Isles Augustin Ley | 9/1877 | BIRM |
| Callitriche autumnalis | GB, VC85 Fifeshire, Loch Leven | John Thomas Irvine Boswell-Syme | Augustin Ley | 8/1870 | BIRM |
| Callitriche autumnalis | GB, VC102 South Ebudes, Islay House | Augustin Ley | Augustin Ley | 5/9/1883 | BIRM |
| Callitriche autumnalis | IE, VCH39 Co. Antrim, Lough Neagh | Coslett Herbert Waddell | Watson Botanical Exchange Club Augustin Ley Coslett Herbert Waddell | 13/8/1909 | BIRM |
| Callitriche autumnalis | GB, VC59 South Lancashire, Knowsley | George Valentine Chapman Last | George Valentine Chapman Last | 14/9/1939 | K |
+ | Callitriche hermaphroditica | GB, VC87 West Perthshire, Lake of Menteith | Robert Kidston | | 26/8/1884 | PTH |
+ | Callitriche hermaphroditica | GB, VC87 West Perthshire, Watston Loch | Robert Kidston | | 16/7/1884 | PTH |
| Callitriche autumnalis | GB, VC111 Orkney, Harray | Henry Halcro Johnston | | 13/11/1883 | K |
| Callitriche autumnalis | GB, VC111 Orkney, Mainland, Loch of Ayre | Henry Halcro Johnston | | 25/8/1916 | K |
| Callitriche hermaphroditica | GB, VC58 Cheshire, Rostherne Mere | W Horton-Smith | | 23/8/1916 | MANCH |
| Callitriche autumnalis | GB, VC11 South Hampshire, Romsey | Douglas Montague Heath | Douglas Montague Heath | 4/9/1925 | BIRM |
| Callitriche hermaphroditica | GB, VC49 Caernarvonshire, Llyn Padarn | | Douglas Montague Heath | 7/7/1921 | BIRM |
| Callitriche hermaphroditica | GB, VC90 Angus, Rescobie Loch | William Gardiner | Croydon Natural History and Scientific Society Henry Franklin Parsons | 8/1843 | SLBI |
| Callitriche autumnalis | GB, VC89 East Perthshire, Loch Clunie [Cluny] | Henry Maurice Drummond-Hay | William Booth Waterfall | 2/9/1876 | K |
| Callitriche autumnalis | GB, VC89 East Perthshire, Loch Clunie [Cluny] | Henry Maurice Drummond-Hay | | 2/9/1877 | K |
| Callitriche autumnalis | GB, VC89 East Perthshire, Loch of Clunie | Henry Maurice Drummond-Hay | | 8/1878 | K |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Loch of Clunie | Henry Maurice Drummond-Hay | | 16/9/1876 | PTH |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Loch of the Lowes | Henry Maurice Drummond-Hay | | 16/9/1876 | PTH |
| Callitriche hermaphroditica | GB, VC92 South Aberdeenshire, Loch Callater | George Claridge Druce | William Hunt Painter | 7/1883 | ABS |