| Mentha aquatica x spicata = M. x piperita | | | Botanical Exchange Club of The British Isles George Claridge Druce | | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | North Wales | William Peete | Spencer Henry Bickham | 1844 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Crantock | Spencer Henry Bickham | Spencer Henry Bickham | 6/10/1904 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Crantock | Spencer Henry Bickham | Spencer Henry Bickham | 6/10/1904 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Crantock | Spencer Henry Bickham | Spencer Henry Bickham | 5/10/1904 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Goonhavern | Chambre Corker Vigurs | Frederick Hamilton Davey | 1/9/1912 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Goonhavern | Chambre Corker Vigurs | Watson Botanical Exchange Club Joseph Edward Little Frederick Hamilton Davey | 9/1912 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Goonhavern | Chambre Corker Vigurs | | 1/9/1912 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey Spencer Henry Bickham | Spencer Henry Bickham | 1/10/1904 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Gwennap | Cyril West | | 9/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Helston | James Cunnack | Botanical Exchange Club of The British Isles John Durbin Gray | 9/1881 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Helston | John Ralfs | Charles Cardale Babington | 26/8/1878 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Cyril West | | 9/1946 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Cyril West | | 9/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC1 West Cornwall, Lamorna | William Curnow | | 8/1879 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Lizard | James Cunnack | Charles Cardale Babington | 7/1878 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Mullion | James Cunnack | Charles Cardale Babington | 8/1882 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Newquay | Chambre Corker Vigurs | A Hosking Edward Morell Holmes | 8/1904 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC1 West Cornwall, Paul | Cyril West | | 9/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC1 West Cornwall, Paul | Cyril West | | 9/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Praa Sands | William Curnow | Henry & James Groves Spencer Henry Bickham | 8/1882 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Praa Sands | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey Spencer Henry Bickham | 16/9/1911 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Saint Columb Minor Cultivated | Spencer Henry Bickham | Spencer Henry Bickham | 21/8/1908 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Saint Columb Minor Cultivated | Spencer Henry Bickham | Spencer Henry Bickham | 4/10/1904 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Saint Columb Minor GB, VC36 Herefordshire, Ledbury Cultivated | Spencer Henry Bickham | Edward Shearburn Marshall George Claridge Druce Spencer Henry Bickham | 21/8/1908 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC2 East Cornwall, Boscastle | Arthur Langford Still | Job Edward Lousley | 1/8/1940 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Plym Valley | Thomas Richard Archer Briggs | Charles Cardale Babington | 29/8/1877 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1947 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1947 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1947 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC4 North Devon, Lynton | Spencer Henry Bickham | Spencer Henry Bickham | 17/9/1902 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC5 South Somerset, Bossington | Edward Shearburn Marshall | | 14/9/1907 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC5 South Somerset, Minehead | Spencer Henry Bickham | Spencer Henry Bickham | 3/9/1895 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC5 South Somerset, Minehead | Henry Oxley Stephens | | 1841 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC6 North Somerset, Mendip Hills | James Walter White | | 16/9/1908 | CGE |