| 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, Hea Moor | Job Edward Lousley | Job Edward Lousley | 17/9/1936 | SLBI |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Helston | James Cunnack | Botanical Exchange Club of The British Isles Charles Bailey | 8/1881 | MANCH |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Helston | James Cunnack | William Hadden Beeby | 8/1878 | SLBI |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Helston | James Cunnack | Charles Bailey | 9/1878 | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Helston | James Cunnack | Charles Bailey John Isaac Briquet | 8/1878 | MANCH |
| 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 | GB, VC1 West Cornwall, Lamorna Cove | William Curnow | William Hunt Painter | 9/1880 | ABS |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Lilant | Schill | Schill | 22/8/1912 | MANCH |
| 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, Lizard Cultivated | William Curnow | | | OXF |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Lizard | Frederick Hamilton Davey | Frederick Hamilton Davey | 16/9/1911 | MANCH |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Mount's Bay | William Curnow | | 9/1878 | OXF |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Mousehole | William Curnow | Charles Bailey Rex Alan Henry Graham | 9/1878 | MANCH |
| 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, Mullion | James Cunnack | Charles Bailey John Isaac Briquet | 9/1881 | MANCH |
| 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 | GB, VC1 West Cornwall, Newquay | | Allan Octavian Hume | 30/8/1900 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Newquay | Chambre Corker Vigurs | Allan Octavian Hume | 30/8/1900 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Pengersick Castle | James Cunnack | Druce Herbarium, Oxford | 8/1878 | OXF |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Penzance | | | 1/9/1873 | MANCH |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Penzance | Edgar A Rees | Druce Herbarium, Oxford | 7/10/1923 | OXF |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Penzance | | Charles Bailey | 9/1875 | MANCH |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Penzance | William Curnow | | 9/1878 | LIV |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | | 4/9/1911 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | | 4/9/1911 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Ponsanooth | Frederick Hamilton Davey | Allan Octavian Hume | 30/8/1899 | SLBI |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Praa Green | James Cunnack | Charles Bailey John Isaac Briquet | 8/1881 | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Praa Green | James Cunnack | Charles Bailey John Isaac Briquet | 8/1881 | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Praa Sands | John Ralfs William Curnow | Charles Bailey | 26/8/1878 | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Praa Sands | William Curnow | Charles Bailey | 9/1879 | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Praa Sands | Henry Groves | Charles Bailey Henry & James Groves John Isaac Briquet | 28/8/1880 | MANCH |
| 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, Praa Sands | William Curnow | | 9/1878 | LIV |
| 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 |