| 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, 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 |
| Callitriche intermedia subsp. hamulata | GB, VC1 West Cornwall, Saint Martin's | Job Edward Lousley | | 28/5/1940 | K |
| Callitriche intermedia subsp. hamulata | GB, VC1 West Cornwall, Saint Mary's, Scilly Isles | Job Edward Lousley | Job Edward Lousley | 3/7/1954 | K |
| Callitriche intermedia subsp. hamulata | GB, VC1 West Cornwall, Scilly Isles,Saint Marys | Job Edward Lousley | Job Edward Lousley | 3/7/1954 | K |
| Callitriche intermedia subsp. hamulata | GB, VC2 East Cornwall, Dozmary Pool | Edgar Thurston | Edgar Thurston | 19/7/1915 | K |
| Callitriche intermedia subsp. hamulata | GB, VC2 East Cornwall, Fowey River, near Dozmary Pool | Edgar Thurston | Edgar Thurston | 19/7/1915 | K |
| Callitriche intermedia subsp. hamulata | GB, VC2 East Cornwall, Par Harbour | Edgar Thurston | Edgar Thurston | 30/7/1925 | K |
| Callitriche intermedia subsp. hamulata | GB, VC3 South Devon, Marsh Mills | | William Booth Waterfall M Bowen | 2/7/1877 | K |
| Callitriche intermedia subsp. hamulata | GB, VC3 South Devon, Moretonhampstead | Clement Reid | | 10/8/1909 | K |
| Callitriche intermedia subsp. hamulata | GB, VC3 South Devon, Newton Poppleford | E Robinson | | 22/8/1957 | K |
| Callitriche intermedia subsp. hamulata | GB, VC3 South Devon, Newton Poppleford | E Robinson | | 13/8/1957 | K |
| Callitriche intermedia subsp. hamulata | GB, VC3 South Devon, Newton Poppleford | E Robinson | | 13/8/1957 | K |
| Callitriche intermedia subsp. hamulata | GB, VC4 North Devon, Pennymoor | M E Edmonds | | 1/8/1932 | K |
| Callitriche intermedia subsp. hamulata | GB, VC11 South Hampshire, Brockenhurst | Charles Bailey | Lester Vallis Lester-Garland Charles Bailey | 18/5/1883 | K |
| Callitriche intermedia subsp. hamulata | GB, VC11 South Hampshire, Lyndhurst | George Claridge Druce | Botanical Exchange Club of The British Isles Herb Britannicum Oxford Charles Edward Britton George Claridge Druce | 6/1926 | K |
| Callitriche intermedia subsp. hamulata | GB, VC11 South Hampshire, New Forest | Charles Edward Britton | Botanical Exchange Club of The British Isles George Claridge Druce | 8/5/1917 | K |
| Callitriche intermedia subsp. hamulata | GB, VC11 South Hampshire, New Forest | Charles Edward Britton | Botanical Exchange Club of The British Isles George Claridge Druce | 5/1917 | K |
| Callitriche intermedia subsp. hamulata | GB, VC14 East Sussex, Chailey Common | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 23/5/1936 | K |
| Callitriche intermedia subsp. hamulata | GB, VC16 West Kent, Snodland | John Patrick Micklethwait Brenan | | 28/5/1936 | K |
| Callitriche intermedia subsp. hamulata | GB, VC17 Surrey, Ashtead | Henry Groves | Henry & James Groves | 20/5/1882 | K |