| 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 | 4/10/1904 | 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 | | Watson Botanical Exchange Club Spencer Henry Bickham William Robert Sherrin | 21/8/1908 | SLBI |
| 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, VC1 West Cornwall, Saint Columb Minor GB, VC36 Herefordshire, Ledbury Cultivated | Spencer Henry Bickham | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford Spencer Henry Bickham | 21/8/1908 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Saint Columb Minor Cultivated | Spencer Henry Bickham | Watson Botanical Exchange Club Spencer Henry Bickham | 21/8/1908 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Saint Ives | William Curnow | | 8/1878 | LIV |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Trereen | John Ralfs | Charles Bailey John Isaac Briquet Rex Alan Henry Graham | 2/9/1878 | MANCH |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Tresamble | Job Edward Lousley | Job Edward Lousley | 14/9/1936 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Trevance Valley | Chambre Corker Vigurs | Chambre Corker Vigurs | 14/9/1905 | ABS |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Trungle Moor, Paul | Job Edward Lousley | Job Edward Lousley | 17/9/1936 | SLBI |
| 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, VC2 East Cornwall, Sowden's Bridge | Francis Rilstone | Watson Botanical Exchange Club | 30/9/1926 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC2 East Cornwall, Sowden's Bridge | Francis Rilstone | Watson Botanical Exchange Club Job Edward Lousley | 30/9/1926 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, Cornwall | Todd | Druce Herbarium, Oxford | 1920 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, Cornwall GB, VC17 Surrey, Croydon Cultivated | Arthur Bennett | Botanical Exchange Club of The British Isles | | LIV |
| Mentha aquatica x spicata = M. x piperita | GB, Cornwall GB, VC17 Surrey, Croydon Cultivated | Arthur Bennett William Curnow | | 1890 | SLBI |
+ | Mentha aquatica x spicata = M. x piperita | GB, Cornwall, Cornwall | William Curnow | Charles Bailey | | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, Cornwall, Cornwall | William Curnow | Charles Bailey John Isaac Briquet | 1887 | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, Cornwall, Cornwall | William Curnow | Charles Bailey | 1888 | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, Cornwall, Cornwall | William Curnow | Charles Bailey Rex Alan Henry Graham | 1888 | MANCH |