| 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 |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Chiddingfold | Job Edward Lousley | | 30/9/1933 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC69 Westmorland, Kirkby Stephen | | | 8/1913 | OXF |
| 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 var. citrata | GB, VC1 West Cornwall, Penzance | William Curnow | Druce Herbarium, Oxford | 9/1878 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC6 North Somerset, Weston in Gordano | Cedric Bucknall | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford Arthur Bennett J Fraser | 8/9/1919 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC23 Oxfordshire, Shotover | George Claridge Druce | Druce Herbarium, Oxford J Fraser | 9/1888 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Alfrick | Richard Francis Towndrow | J Fraser Richard Francis Towndrow | 15/9/1884 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Holmwood | | Henry Elliott Fox J Fraser J G William Hadden Beeby | 20/8/1885 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC57 Derbyshire, Belper | Edward Francis Linton | Druce Herbarium, Oxford Edward Francis Linton | 22/9/1892 | OXF |
| 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, VC1 West Cornwall, Crantock | Chambre Corker Vigurs | | 8/1903 to 1905 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Brailes | | Druce Herbarium, Oxford Henry Elliott Fox | | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC19 North Essex, Maplestead | George Claridge Druce | Druce Herbarium, Oxford | 8/1905 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC57 Derbyshire, Belper | | Botanical Exchange Club of The British Isles Druce's Original Herbarium Edward Francis Linton | 9/1892 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC57 Derbyshire, Snelston | J Fraser | Botanical Exchange Club of The British Isles Druce's Original Herbarium Edward Francis Linton | 9/1892 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, North Leigh | George Claridge Druce | George Claridge Druce | 9/1915 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC6 North Somerset, Priddy | James Walter White | Druce's Original Herbarium J Fraser | 16/9/1906 1925 | OXF |
| 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, VC3 South Devon, Sidmouth | | Druce Herbarium, Oxford J Fraser | 8/1904 | 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, VC20 Hertfordshire, Roydon | William Higgins Coleman | Druce Herbarium, Oxford J Fraser | 4/10/1843 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, Somerset, Cutcombe | Mason | Druce Herbarium, Oxford | 23/8/1928 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC36 Herefordshire, Ledbury | Spencer Henry Bickham | Druce Herbarium, Oxford Spencer Henry Bickham | 9/1931 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Warwick | Henry Bromwich | Druce Herbarium, Oxford F Stratton | 9/1877 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC93 North Aberdeenshire, New Aberdour | J Fraser | J Fraser | 17/9/1927 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC87 West Perthshire, Callander | Young | | | OXF |
| Mentha aquatica x spicata = M. x piperita | IE, VCH1 South Kerry, Kenmare | George Claridge Druce | Druce Herbarium, Oxford | 1927 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Kew Green Cultivated GB, VC93 North Aberdeenshire, New Aberdour | J Fraser | J Fraser | 22/7/1920 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC58 Cheshire, Knutsford,Plumbley | Charles Bailey | Druce Herbarium, Oxford | 15/9/1900 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC54 North Lincolnshire, Tobyon | Marsden | Druce Herbarium, Oxford George Claridge Druce | | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC47 Montgomeryshire, Craig Breidden | George Claridge Druce | George Claridge Druce | 1896 | OXF |