| Mentha x piperita | GB, VC1 West Cornwall, Pengersick Castle | James Cunnack | | 7/1878 8/1878 | K |
| 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 | 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 x piperita | GB, VC1 West Cornwall, Ponsanooth | Cecil I Sandwith | | 18/8/1935 | K |
| 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 x piperita | GB, VC1 West Cornwall, Praa Sands | James Cunnack | | 8/1881 | K |
| Mentha x piperita | GB, VC1 West Cornwall, Praa Sands | Henry Groves | Botanical Exchange Club of The British Isles Henry & James Groves | 28/8/1880 | K |
| Mentha x piperita | GB, VC1 West Cornwall, Praa Sands | John Ralfs | | 31/8/1877 | K |
| 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 x piperita | GB, VC1 West Cornwall, Saint Ervan | Laurence Athelstan Molesworth Riley | Laurence Athelstan Molesworth Riley | 5/9/1906 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Saint Ives | William Curnow | | 8/1878 | LIV |
| Mentha x piperita | GB, VC1 West Cornwall, Tolskithy | Emily Sophia Todd | J Fraser | 29/8/1933 | K |
| 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 x piperita | GB, VC2 East Cornwall, Boscastle | Herbert William Pugsley | Watson Botanical Exchange Club Herbert William Pugsley J Fraser | 15/9/1932 | K |
| Mentha x piperita | GB, VC2 East Cornwall, Par | | Arthur Bennett | | K |
| Mentha x piperita | GB, VC2 East Cornwall, Par | | Arthur Bennett | 9/1879 | K |
| 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 x piperita | GB, VC2 East Cornwall, Sowden's Bridge | Edgar Thurston | Edgar Thurston | 25/9/1921 | K |
| 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 dumetorum | GB, Cornwall GB, VC17 Surrey, Croydon Cultivated | Arthur Bennett | William Hunt Painter | 1886 | ABS |
| Mentha dumetorum | GB, Cornwall GB, VC17 Surrey, Croydon Cultivated | Arthur Bennett | Botanical Exchange Club of The British Isles William Hunt Painter | 1888 | ABS |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Aveton Gifford | Arthur Langford Still | Job Edward Lousley | 21/8/1935 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Ivybridge | Norman Douglas Simpson | Norman Douglas Simpson | 24/9/1937 | OXF |
| Mentha x piperita | GB, VC3 South Devon, Otterton | Horace M Montford | | 19/9/1935 | K |