| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC20 Hertfordshire, Northaw | Spencer Henry Bickham | Spencer Henry Bickham | 22/9/1918 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC20 Hertfordshire, Northaw Cultivated | Spencer Henry Bickham | Watson Botanical Exchange Club Albert Bruce Jackson | 22/9/1918 | K |
| 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 var. citrata | GB, VC17 Surrey, Kew Cultivated GB, VC20 Hertfordshire, Northaw | J Fraser | J Fraser | 11/9/1914 | K |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Reigate Cultivated GB, VC20 Hertfordshire, Northaw | | | 9/1914 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC20 Hertfordshire, Northaw | Charles Edgar Salmon | Charles Edgar Salmon | 9/1914 | CGE |
| 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 var. citrata | GB, VC23 Oxfordshire, Shotover | George Claridge Druce | Druce Herbarium, Oxford J Fraser | 9/1888 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC23 Oxfordshire, Shotover Hill | | Henry Boswell | 9/1861 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC34 West Gloucestershire, Bristol,Long Ashton | B O Mulligan | J Fraser | 12/9/1933 | K |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC36 Herefordshire, Ledbury Cultivated | Spencer Henry Bickham | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford Spencer Henry Bickham | 20/9/1918 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC36 Herefordshire, Ledbury | Spencer Henry Bickham | Botanical Exchange Club of The British Isles Spencer Henry Bickham | 9/1931 | K |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC36 Herefordshire, Ledbury | Charles Edward Britton Spencer Henry Bickham | Botanical Exchange Club of The British Isles Spencer Henry Bickham | 9/1931 | K |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC36 Herefordshire, Ledbury | Spencer Henry Bickham | Botanical Exchange Club of The British Isles J Fraser Spencer Henry Bickham | 9/1931 | K |
| 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 var. citrata | GB, VC39 Staffordshire, Barton under Needwood | Kirby Trimmer | | 15/8/1854 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC45 Pembrokeshire, Castlemartin | | Charles Cardale Babington | 6/9/1851 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC49 Caernarvonshire, Capel Curig | | Druce's Original Herbarium | | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Croydon Cultivated GB, VC57 Derbyshire | Arthur Bennett William Curnow | Charles Cardale Babington Arthur Bennett | 8/1878 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Croydon Cultivated GB, VC57 Derbyshire | Arthur Bennett William Curnow | Arthur Bennett | 7/1874 to 8/1874 | LIV |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC57 Derbyshire | | | 9/1870 | LIV |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC57 Derbyshire | Stubbs | Charles Cardale Babington Elizabeth Anne Lomax | 8/1876 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC59 South Lancashire, Southport | Frederick William Holder | Joseph Norman Frankland | 21/9/1929 | LIV |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC64 Mid-west Yorkshire, Tadcaster | J Jackson | John Durbin Gray | 7/1881 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC64 Mid-west Yorkshire, Tadcaster | | | 8/1884 | LIV |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC64 Mid-west Yorkshire, Tadcaster | J Jackson | Arthur Bennett | 8/1881 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC68 North Northumberland, Hedgehope Hill | W Fampton | Druce Herbarium, Oxford William Wilson Saunders Dawes Cholmeley Russell | | OXF |