| 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, 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 |
+ | Mentha dumetorum | GB, Cornwall, Cornwall | William Curnow | Elizabeth Anne Smithson | 1890 | MANCH |
| 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 |
| 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, Plymbridge | Thomas Richard Archer Briggs | Elizabeth Anne Lomax | 23/8/1877 | MANCH |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Plymbridge | Thomas Richard Archer Briggs | Druce Herbarium, Oxford J Fraser | 23/8/1877 | OXF |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | | 15/9/1876 | BIRM |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Sidmouth | | Druce Herbarium, Oxford J Fraser | 8/1904 | OXF |
| 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 | | 8/1947 | 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 | | 8/1948 | 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 | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC4 North Devon, Lynmouth | George Claridge Druce | Druce Herbarium, Oxford George Claridge Druce J Fraser | 8/1896 | OXF |
| 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, Devon, Tiverton | | Job Edward Lousley | 10/9/1943 | SLBI |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC5 South Somerset, Aisholt | T Clark | | 11/9/1857 | BIRM |