| Callitriche hermaphroditica | IE, VCH39 Co. Antrim, Toome | Robert Lloyd Praeger | Robert Lloyd Praeger | 6/1893 | DBC |
| 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 hermaphroditica | IE, VCH39 Co. Antrim, Antrim | William Mateer | Harold Stuart Thompson Thomas Clark | | BIRM |
| Callitriche hermaphroditica | IE, VCH38 Co. Down, Aughnadarragh | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 8/1896 | SLBI |
| Callitriche hermaphroditica | IE, VCH26 East Mayo, Cong | Charles Bailey | William Hadden Beeby | 2/10/1885 | SLBI |
| Callitriche hermaphroditica | IE, VCH2 North Kerry, KIllarney lakes | Robert Albert Phillips | Allan Octavian Hume | 7/1899 | SLBI |
| Callitriche autumnalis | IE, VCH16,VCH26, Cong | Charles Bailey | Charles Bailey George Stephen West | 2/10/1885 | BIRM |
| Callitriche hermaphroditica | IE, VCH16,VCH26, Cong | Charles Bailey | Botanical Exchange Club of The British Isles Charles Bailey William Hunt Painter | 2/10/1885 | ABS |
| Callitriche autumnalis | GB, VC112 Shetland, Unst | William Hadden Beeby | | 1/9/1887 | K |
| Callitriche autumnalis | GB, VC112 Shetland, Spiggie | George Claridge Druce | Botanical Society & Exchange Club of The British Isles Charles Edward Britton | 7/1924 | K |
| Callitriche autumnalis | GB, VC112 Shetland, Loch of Asta | Job Edward Lousley | Job Edward Lousley | 27/7/1950 | K |
| Callitriche autumnalis | GB, VC111 Orkney, Stromness | | | 14/10/1913 | K |
| Callitriche autumnalis | GB, VC111 Orkney, Mainland, Loch of Ayre | Henry Halcro Johnston | | 25/8/1916 | K |
| Callitriche autumnalis | GB, VC111 Orkney, Kirk Ness | | | 30/9/1925 | K |
| Callitriche autumnalis | GB, VC111 Orkney, Harray | Henry Halcro Johnston | | 13/11/1883 | K |
| Callitriche autumnalis | GB, VC109 Caithness | Robert Dick | William Lowndes Notcutt | 1837 | K |
| Callitriche autumnalis | GB, VC106 East Ross & Cromarty, Loch Kinellan | Charles Bailey | George Stephen West | 28/7/1890 | BIRM |
| Callitriche autumnalis | GB, VC102 South Ebudes, Islay House | Augustin Ley | Augustin Ley | 5/9/1883 | BIRM |
| Callitriche autumnalis | GB, VC92 South Aberdeenshire, Loch of Park | Thomas Robertson Sim | George Stephen West | 9/1878 | BIRM |
| Callitriche hermaphroditica | GB, VC92 South Aberdeenshire, Loch Callater | George Claridge Druce | William Hunt Painter | 7/1883 | ABS |
| Callitriche hermaphroditica | GB, VC90 Angus, Rescobie Loch | William Gardiner | Croydon Natural History and Scientific Society Henry Franklin Parsons | 8/1843 | SLBI |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, White Loch | Abram Sturrock | | 3/9/1881 | PTH |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, White Loch | Abram Sturrock | | 5/9/1883 | PTH |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, White Loch | Abram Sturrock | | 14/8/1882 | PTH |
| Callitriche autumnalis | GB, VC89 East Perthshire, Stormont Loch | Cecil Ivry Sandwith Noel Yvri Sandwith | | 31/7/1936 | K |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Stormont Loch | Abram Sturrock | | 31/8/1883 | PTH |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Stormont Loch | Francis Buchanan White | | 18/8/1881 | PTH |
| Callitriche autumnalis | GB, VC89 East Perthshire, Marlee Loch | J.G | | 15/7/1884 | SLBI |
| Callitriche autumnalis | GB, VC89 East Perthshire, Marlee Loch | McTaggert Cowan | Botanical Exchange Club of The British Isles McTaggert Cowan | | K |
| Callitriche hermaphroditica | GB, VC89 East Perthshire, Marlee Loch | James Groves | Robert Kidston William Hadden Beeby | 15/7/1884 | SLBI |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Marlee Loch | Edward Shearburn Marshall | | 19/7/1892 | PTH |
| Callitriche hermaphroditica | GB, VC89 East Perthshire, Marlee Loch | Abram Sturrock James Groves | | 15/7/1884 | SLBI |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Loch of the Lowes | Henry Maurice Drummond-Hay | | 16/9/1876 | PTH |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Loch of the Lowes | Francis Buchanan White | | | PTH |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Loch of the Lowes | Francis Buchanan White | | 10/8/1883 | PTH |
| Callitriche autumnalis | GB, VC89 East Perthshire, Loch of Clunie | George Arnott Walker Arnott | Botanical Society of Edinburgh Richard Chandler Alexander Prior | 9/1829 | K |
| Callitriche autumnalis | GB, VC89 East Perthshire, Loch of Clunie | Henry Maurice Drummond-Hay | | 8/1878 | K |
| Callitriche autumnalis | GB, VC89 East Perthshire, Loch of Clunie | W McIvor | | 8/1847 | K |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Loch of Clunie | | | 9/8/1881 | PTH |
+ | Callitriche hermaphroditica | GB, VC89 East Perthshire, Loch of Clunie | Henry Maurice Drummond-Hay | | 16/9/1876 | PTH |