| Callitriche intermedia | GB, VC70 Cumberland, Cumberland | Fenton John Anthony Hort | | 9/1849 | K |
| Callitriche intermedia | GB, VC70 Cumberland, Seathwaite | Clara Winsome Muirhead | Botanical Society & Exchange Club of The British Isles Carlisle Museum Herbarium | 17/6/1946 | K |
| Callitriche intermedia | GB, VC71 Isle of Man, Douglas | | Robert Large Baker | 8/1877 | BIRM |
| Callitriche intermedia | GB, VC72 Dumfriesshire, Loch Skene | | William Jackson Hooker | 7/1848 | K |
| Callitriche intermedia | GB, VC72 Dumfriesshire, Loch Skene | William Stevens | William Stevens | 7/1848 | K |
| Callitriche intermedia | GB, VC76 Renfrewshire, Dykefoot | Robert MacKechnie | | 10/6/1964 | K |
| Callitriche intermedia | GB, VC79 Selkirkshire, Easter Deloraine | Edgar Wolston Bertram Handsley Milne-Redhead | | 7/7/1960 | K |
| Callitriche intermedia | GB, VC83 Midlothian, Edinburgh | John Thomas Irvine Boswell-Syme | | 6/1857 | K |
| Callitriche intermedia | GB, VC83 Midlothian, Edinburgh | John Thomas Irvine Boswell-Syme | John Thomas Irvine Boswell-Syme | 6/1857 | K |
| Callitriche intermedia | GB, VC85 Fifeshire, Isle of May | William Julius Eggeling | | 8/1954 | K |
| Callitriche intermedia | GB, VC88 Mid Perthshire, Kenmore | Bernard Verdcourt | | 30/6/1983 | K |
| Callitriche intermedia | GB, VC89 East Perthshire, Loch of Clunie | William Jackson Hooker | George Bentham | 1823 | K |
| Callitriche intermedia | GB, VC90 Angus, Forfar | Margaret Corstorphine Robert Henry Corstorphine | Botanical Exchange Club of The British Isles Albert Bruce Jackson R & M Corstorphine | 22/10/1913 | K |
| Callitriche intermedia | GB, VC96 East Inverness-shire, Abernethy Forest | Clifford Charles Townsend | Clifford Charles Townsend | 24/7/1956 | K |
| Callitriche intermedia | GB, VC96 East Inverness-shire, Lochindorb | Mary McCallum Webster | | 4/7/1961 | K |
| Callitriche intermedia | GB, VC96 East Inverness-shire, Nairn | Mary McCallum Webster | | 1/7/1961 | K |
| Callitriche intermedia | GB, VC97 West Inverness-shire, Ben Alder | Hewett Cottrell Watson | | 7/1841 | K |
| Callitriche intermedia | GB, VC97 West Inverness-shire, Loch Lochy | | John Stuart Mill | 7/1871 | K |
| Callitriche intermedia | GB, VC106 East Ross & Cromarty, Loch a' Chroisg | Ernest Stanley Salmon | Ernest Stanley Salmon | 8/1896 | K |
| Callitriche intermedia | GB, VC107 East Sutherland, Invershin | Clara Winsome Muirhead | Carlisle Museum Herbarium | 14/10/1946 | K |
| Callitriche intermedia | GB, VC108 West Sutherland, Inchnadamph | Edward Shearburn Marshall | Watson Botanical Exchange Club | 18/7/1908 | K |
| Callitriche intermedia | GB, VC108 West Sutherland, Inchnadamph | Edward Shearburn Marshall | Watson Botanical Exchange Club Albert Bruce Jackson | 18/7/1908 | K |
| Callitriche intermedia | GB, VC111 Orkney, Eday | Henry Halcro Johnston | | 14/5/1921 | K |
| Callitriche intermedia | GB, VC111 Orkney, Holm of Houton | Henry Halcro Johnston | | 6/1933 | K |
| Callitriche intermedia | GB, VC111 Orkney, Holm of Houton | Henry Halcro Johnston | | 8/1933 | K |
| Callitriche intermedia | GB, VC111 Orkney, Holm of Houton | Henry Halcro Johnston | | 1/6/1933 | K |
| Callitriche intermedia | GB, VC111 Orkney, Rendall | Henry Halcro Johnston | | 16/6/1928 | K |
| Callitriche intermedia | GB, VC111 Orkney, Rousay | Henry Halcro Johnston | | 22/8/1921 | K |
| Callitriche intermedia | GB, VC112 Shetland, Bressay | William Robert Price | | 6/6/1928 | K |
| Callitriche intermedia | GB, VC112 Shetland, Unst | Job Edward Lousley | Job Edward Lousley | 24/7/1950 | K |
| Callitriche intermedia | GB, VC113 Channel Islands, Grand Val | | Lester Vallis Lester-Garland | 28/4/1900 | K |
| Callitriche intermedia | GB, VC113 Channel Islands, Guernsey,Vazon Bay | | Augustin Ley | 30/7/1885 | BIRM |
| Callitriche intermedia | GB, VC113 Channel Islands, Jersey, Corbiere | | Lester Vallis Lester-Garland | 23/4/1899 | K |
| Callitriche intermedia | GB, VC113 Channel Islands, Sark Dixcart Bay | M E Edmonds | | 4/1930 | K |
| Callitriche intermedia | IE, VCH1 South Kerry, Lough Anscaul | | | 6/1898 | K |
| Callitriche intermedia | IE, VCH1 South Kerry, Waterville | David Allardice Webb | | 24/6/1952 | K |
| Callitriche intermedia | IE, VCH1 South Kerry, Waterville | David Allardice Webb | | 24/6/1952 | K |
| Callitriche intermedia | IE, VCH2 North Kerry, Killarney | Reginald Wiliam Scully | Reginald Wiliam Scully | 6/1888 | K |
| Callitriche intermedia | IE, VCH28 Co. Sligo, Geevagh | David Allardice Webb | | 13/8/1952 | K |
| Callitriche intermedia | IE, VCH33 Fermanagh | Robert Desmond Meikle | | 11/7/1956 | K |
| Callitriche intermedia | IE, VCH33 Fermanagh, Ballanamallard | Edward Norman Carrothers | | 7/1955 | K |
| Callitriche intermedia | IE, VCH33 Fermanagh, Ballinamallard | Edward Norman Carrothers | | 7/1955 | K |
| Callitriche intermedia | IE, VCH33 Fermanagh, Blaney | Edward Norman Carrothers | | 7/1955 | K |
| Callitriche intermedia | IE, VCH33 Fermanagh, Kesh | Robert Desmond Meikle | | 9/7/1956 | K |
| Callitriche intermedia | IE, VCH33 Fermanagh, Lisnaskea | Robert Desmond Meikle | | 13/7/1956 | K |
| Callitriche intermedia | IE, VCH33 Fermanagh, Ross Lough | Robert Desmond Meikle | | 13/7/1954 | K |
| Callitriche intermedia | IE, VCH38 Co. Down, Aughnadarragh | Coslett Herbert Waddell | Coslett Herbert Waddell John Innes Horticultural Institute | 8/1896 | K |