| 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, Cornwall | Todd | Druce Herbarium, Oxford | 1920 | 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, VC3 South Devon, Sidmouth | | Druce Herbarium, Oxford J Fraser | 8/1904 | OXF |
| 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, VC6 North Somerset, Bath | | Druce Herbarium, Oxford Charlotte Ellen Palmer | | 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 | GB, Somerset, Cutcombe | Mason | Druce Herbarium, Oxford | 23/8/1928 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC8 South Wiltshire, Bedwyn Brail | Cecil Prescott Hurst | Druce Herbarium, Oxford | 14/7/1922 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC14 East Sussex, Danehill | Arthur Langford Still | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford Edward Charles Wallace | 8/9/1926 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Chiddingfold | Edmund Browne Bishop | Druce Herbarium, Oxford | | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Sutton Cultivated | Edward Charles Wallace | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford | 9/1937 | 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, VC19 North Essex, Peldon | George Charles Brown Herbert Stanley Redgrove | Druce Herbarium, Oxford | 30/8/1923 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC20 Hertfordshire, Bayford | | Druce Herbarium, Oxford | | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC20 Hertfordshire, Bengeo | William Higgins Coleman | Druce Herbarium, Oxford | 30/9/1843 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC20 Hertfordshire, Northaw Cultivated | Spencer Henry Bickham | Druce Herbarium, Oxford Henry Elliott Fox Spencer Henry Bickham | 22/9/1918 | 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, VC20 Hertfordshire, Waterford Marsh | John Ansell | Druce Herbarium, Oxford | 22/8/1846 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC22 Berkshire, Didcot | Richard Charles Palmer | Druce Herbarium, Oxford | 8/8/1998 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC22 Berkshire, Didcot | George Claridge Druce | Druce Herbarium, Oxford | 9/1888 9/1889 10/1891 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, Brackley | Richard Charles Palmer | Druce Herbarium, Oxford | 4/9/1963 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, Mixbury | Richard Charles Palmer | Druce Herbarium, Oxford | 4/9/1963 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, Risinghurst | Richard Charles Palmer | Druce Herbarium, Oxford | 27/8/1968 | 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, VC23 Oxfordshire, Woodstock | George Claridge Druce | Druce Herbarium, Oxford | | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, Wroxton | Richard Charles Palmer | Druce Herbarium, Oxford | 29/8/1964 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC32 Northamptonshire, Duston | George Claridge Druce | Druce Herbarium, Oxford | 9/1876 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC34 West Gloucestershire, Longhope | Gustavus A Ornano St Brody | Druce Herbarium, Oxford Frederic Stratton | 1869 | OXF |
| 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 | Druce Herbarium, Oxford Spencer Henry Bickham | 9/1931 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Kidderminster | Richard Charles L'Estrange Burges | Druce Herbarium, Oxford | 1936 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Balsall Common | Henry Bromwich | Druce Herbarium, Oxford F Stratton | 9/1869 | 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, VC38 Warwickshire, Warwick | Henry Bromwich | Druce Herbarium, Oxford F Stratton | 9/1877 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC40 Shropshire, Clun Church | Richard Charles Palmer | Druce Herbarium, Oxford | 4/9/1951 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC41 Glamorganshire, Dinas Powis GB, VC41 Glamorganshire, Wenvoe | S Dewar | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford National Museum of Wales Arthur Edward Wade | 14/9/1932 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC43 Radnorshire, Bough Wood | | Druce Herbarium, Oxford | 1927 | 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, VC57 Derbyshire, Belper | Edward Francis Linton | Druce Herbarium, Oxford Edward Francis Linton | 22/9/1892 | OXF |