| 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 spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Praa Sands | Henry Groves | Henry & James Groves | 28/8/1880 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Saint Columb Minor | Spencer Henry Bickham | Spencer Henry Bickham | 4/10/1904 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Saint Columb Minor | 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 | 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 GB, VC36 Herefordshire, Ledbury Cultivated | Spencer Henry Bickham | Edward Shearburn Marshall George Claridge Druce Spencer Henry Bickham | 21/8/1908 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Saint Columb Minor | Chambre Corker Vigurs | | 1/9/1905 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Sennan | Frederick Robert Tennant | | 8/1899 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Sennen | Frederick Robert Tennant | | 8/1897 | CGE |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC1 West Cornwall, Tresamble, Gwennap | Frederick Hamilton Davey Spencer Henry Bickham | Spencer Henry Bickham | 1/10/1904 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey | 9/9/1907 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | Frederick Hamilton Davey | 9/9/1907 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC2 East Cornwall, Boscastle | Arthur Langford Still | Job Edward Lousley | 1/8/1940 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC2 East Cornwall, Carkeel | Thomas Richard Archer Briggs | Charles Cardale Babington | 19/9/1873 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC2 East Cornwall, Davidstow | Chambre Corker Vigurs | | 29/9/1906 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC2 East Cornwall, Hatt | Thomas Richard Archer Briggs | | 4/9/1877 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC2 East Cornwall, Hatt, Botus Fleming | Thomas Richard Archer Briggs | | 12/9/1876 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC2 East Cornwall, Hatt, Botusfleming | Thomas Richard Archer Briggs | | 12/9/1876 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC2 East Cornwall, Porthscatho | Christopher Donald Pigott | | 9/1947 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC2 East Cornwall, Saint Mellion | Thomas Richard Archer Briggs | | 4/9/1877 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC2 East Cornwall, treglasta | | | 29/9/1906 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Aveton Gifford | Thomas Richard Archer Briggs | Charles Cardale Babington | 5/8/1880 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Aveton Gifford | Edward Shearburn Marshall | | 17/7/1894 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Bere Ferrers | Cyril West | | 8/1957 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Diptford | Thomas Richard Archer Briggs | Charles Cardale Babington | 18/8/1881 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Charles Cardale Babington | 7/9/1877 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Charles Cardale Babington | 30/8/1881 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Charles Cardale Babington | 30/8/1881 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Ivybridge | Thomas Richard Archer Briggs | | 15/9/1877 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Meavy | William Booth Waterfall | Charles Cardale Babington | 25/7/1878 | 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 arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Teignmouth | | | 13/9/1954 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Walkhampton | Cyril West | | 8/1947 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Walkhampton | Cyril West | | 8/1947 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Walkhampton | Cyril West | | 8/1947 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1947 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | 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 |