| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC2 East Cornwall, Calstock | Allan Octavian Hume | Allan Octavian Hume | 30/7/1901 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC2 East Cornwall, Calstock | Thomas Richard Archer Briggs | Augustin Ley | 7/9/1875 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC2 East Cornwall, East Cornwall,Calstock | Allan Octavian Hume | Allan Octavian Hume | 30/7/1901 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC3 South Devon, Calstock | William Curnow | | 8/1880 | ABS |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC3 South Devon, Calstock | | John Ralfs | 7/1875 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC13 West Sussex, Amberley | Job Edward Lousley | Job Edward Lousley | 9/8/1930 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC13 West Sussex, Amberley | Charles Edgar Salmon Edward Shearburn Marshall | Watson Botanical Exchange Club Harold Stuart Thompson | 3/9/1901 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC13 West Sussex, Houghton | Job Edward Lousley | Job Edward Lousley | 10/8/1930 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC13 West Sussex, River Arun | Frederick Henry Arnold | | 3/7/1875 | BON |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC13 West Sussex, River Arun | John Frederick Rayner | | 8/1925 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC13 West Sussex, Stopham | Edward Charles Wallace | Edward Charles Wallace Job Edward Lousley | 25/6/1933 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC15 East Kent, Folkestone,East Wear Bay | Gerard Edwards Smith | | | MANCH |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC16 West Kent, Greenwich | | Frederick Townsend | 5/1830 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, Kent, Aylesford | | Douglas Montague Heath | 7/9/1926 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Barnes | | Croydon Natural History and Scientific Society | 1864 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Barnes | William Hadden Beeby | William Hadden Beeby | 31/8/1872 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Barnes | Job Edward Lousley | Job Edward Lousley | 18/7/1925 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Battersea | | | | MANCH |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Battersea | | | | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Battersea | John Ellerton Stocks | | 8/1842 | BON |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Kew | John Gilbert Baker | | 8/1877 | BON |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Kew | Albert Bruce Jackson | Botanical Exchange Club of The British Isles Augustin Ley | 9/1907 10/1907 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Kew | Philip Brookes Mason | Philip Brookes Mason | 1872 | BON |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Kew | Robert Hugh Bunting William Robert Sherrin | William Robert Sherrin | 7/1906 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Kew Bridge | Richard Charles L'Estrange Burges | | 8/9/1942 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Kew Bridge | Richard Charles L'Estrange Burges | | 8/9/1942 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Kew Bridge | Job Edward Lousley | Job Edward Lousley | 16/8/1939 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Mortlake | Job Edward Lousley | Job Edward Lousley | 5/9/1931 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Putney | Henry Groves James Groves | Henry & James Groves | 7/1874 | BON |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Putney | Henry Groves | George Stephen West Henry Groves | 8/1874 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Putney | James Groves | Henry & James Groves Robert Large Baker | 9/10/1875 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Putney | William Hadden Beeby | Augustin Ley William Hadden Beeby | 31/8/1872 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Putney | William Hadden Beeby | Augustin Ley William Hadden Beeby | 31/8/1872 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17 Surrey, Wandsworth | John Thomas Irvine Boswell-Syme | Botanical Society of London John Thomas Irvine Boswell-Syme | 9/1851 8/1853 | BON |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC21 Middlesex, Brentford | | Croydon Natural History and Scientific Society | 25/6/1898 | SLBI |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC17,VC21, Barnes Bridge | | Douglas Montague Heath | 17/9/1926 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC27 East Norfolk, Salhouse Broad | Douglas Montague Heath | Douglas Montague Heath | 6/9/1915 | BIRM |
| Schoenoplectus lacustris x triqueter = S. x carinatus | GB, VC64 Mid-west Yorkshire, Ripon | William West | George Stephen West William West | 7/1904 | BIRM |