| 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, VC32 Northamptonshire, Market Deeping | George Claridge Druce | George Claridge Druce | 8/1913 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Crantock | George Claridge Druce | George Claridge Druce | 8/1908 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC20 Hertfordshire, Northaw Cultivated | Charles Edgar Salmon | Charles Edgar Salmon George Claridge Druce | 9/1914 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC24 Buckinghamshire, Brickhill | George Claridge Druce | George Claridge Druce | 8/1902 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC93 North Aberdeenshire, Fyvie | F Turreff | George Claridge Druce | 8/1929 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC24 Buckinghamshire, Westbury | George Claridge Druce | George Claridge Druce | 9/1902 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC43 Radnorshire, Glasbury | George Claridge Druce | | 9/1929 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Chiddingfold | George Claridge Druce | George Claridge Druce | 5/1920 | OXF |
| Mentha aquatica x spicata = M. x piperita | IE, Kerry, Dingle | George Claridge Druce | George Claridge Druce | 9/1906 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC27 East Norfolk, West Runton | Mason | George Claridge Druce | 23/8/1899 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC22 Berkshire, Didcot | George Claridge Druce | | 8/1896 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC90 Angus, Guthrie | George Claridge Druce Margaret Corstorphine Robert Henry Corstorphine | | 9/1912 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, Shotover | George Claridge Druce | | 9/1885 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC20 Hertfordshire, Roydon | George Claridge Druce | | 9/1915 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Crantock | George Claridge Druce | | 8/1908 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, North Leigh | George Claridge Druce | | 9/1884 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC22 Berkshire, Uffington | George Claridge Druce | | 1890 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC78 Peeblesshire, Peebles | George Claridge Druce | | 9/1917 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC92 South Aberdeenshire, Alford | George Claridge Druce | | 8/1918 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Crantock | George Claridge Druce | | 8/1908 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC22 Berkshire, Cothill | George Claridge Druce | | 9/1896 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC112 Shetland, Bay of Scousburgh | George Claridge Druce | | 8/1924 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC33 East Gloucestershire, Compton Abdale | George Claridge Druce | | 1930 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC70 Cumberland, Drigg | Robert Hardy Williamson | George Claridge Druce | 1924 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC97 West Inverness-shire, Arisaig | George Claridge Druce | George Claridge Druce | 8/1908 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC104 North Ebudes, Glen Sligachan | George Claridge Druce | | 6/1910 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, Wolvercote | George Claridge Druce | George Claridge Druce | 1896 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Emscote | Henry Bromwich | George Claridge Druce | 9/1868 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC111 Orkney, Stenness | Henry Halcro Johnston | | 18/10/1922 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC6 North Somerset, Glastonbury | | Charlotte Ellen Palmer | | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Sanderstead | Job Edward Lousley | Job Edward Lousley | 4/9/1927 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Chiddingfold | | | 2/8/1936 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Ivybridge | Norman Douglas Simpson | Norman Douglas Simpson | 24/9/1937 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC28 West Norfolk, South Creake | | | 7/8/1901 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Holmwood Common | Edward Charles Wallace | Edward Charles Wallace | 1/9/1934 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC8 South Wiltshire, Bedwyn Brail | Patrick Martin Hall | Patrick Martin Hall | 18/9/1938 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC27 East Norfolk, Southwood | Kirby Trimmer | | 6/1861 | 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, VC37 Worcestershire, Kidderminster | Richard Charles L'Estrange Burges | | 1936 | OXF |