| Mentha aquatica x spicata = M. x piperita | | | Druce Herbarium, Oxford | | 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, VC23 Oxfordshire, Wroxton | Richard Charles Palmer | Druce Herbarium, Oxford | 29/8/1964 | 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, VC23 Oxfordshire, Mixbury | Richard Charles Palmer | Druce Herbarium, Oxford | 4/9/1963 | 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, VC78 Peeblesshire, Kittlegairy Hill | Charles Bailey | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford | 27/9/1898 | 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 | GB, VC40 Shropshire, Clun Church | Richard Charles Palmer | Druce Herbarium, Oxford | 4/9/1951 | 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, Cornwall | Todd | Druce Herbarium, Oxford | 1920 | 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, VC88 Mid Perthshire, Fortingall | Edmund Frederic Warburg | Druce Herbarium, Oxford | 2/9/1947 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC57 Derbyshire, Bradford Dale | H J Killick | Druce Herbarium, Oxford | 28/8/1999 | 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, VC22 Berkshire, Didcot | Richard Charles Palmer | Druce Herbarium, Oxford | 8/8/1998 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC98 Argyllshire, Ballachulish | Edmund Frederic Warburg | Druce Herbarium, Oxford | 28/8/1947 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC20 Hertfordshire, Bayford | | Druce Herbarium, Oxford | | 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 | GB, VC1 West Cornwall, Penzance | Edgar A Rees | Druce Herbarium, Oxford | 7/10/1923 | 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, VC22 Berkshire, Didcot | George Claridge Druce | Druce Herbarium, Oxford | 9/1888 9/1889 10/1891 | 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, VC13 West Sussex, River Rother | M P junior | Dulwich College | 8/1895 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Warwick | Robert Large Baker | Liverpool University | 9/1880 | LIV |
| 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, VC41 Glamorganshire, Dinas Powis | S Dewar | Botanical Exchange Club of The British Isles National Museum of Wales Job Edward Lousley | 14/9/1932 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC41 Glamorganshire, Dinas Powis | S Dewar | Botanical Exchange Club of The British Isles National Museum of Wales | 14/9/1932 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, Shotover | | Oxford University Herbarium | 30/9/1887 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Blakedown | Job Edward Lousley | Reading University Job Edward Lousley | 19/9/1937 | LIV |
| Mentha aquatica x spicata = M. x piperita | GB, VC85 Fifeshire, Lundin Links | Alexander Somerville | Royal Botanic Garden, Edinburgh Alexander Somerville | 29/8/1890 | LIV |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Kew Gardens Cultivated | Prosper Marsden | Royal Botanical Gardens, Kew | 16/7/1889 | LIV |
| Mentha aquatica x spicata = M. x piperita | GB, VC63 South-west Yorkshire, Ecclesfield | | Shrewsbury Public Library | 9/1871 | K |
| Mentha x piperita | | John Eddowes Bowman | Shrewsbury Public Library | | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC27 East Norfolk, Whitwell | Kirby Trimmer | The British Museum | 28/8/1883 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC83 Midlothian, Loganbank | | University of Exeter | 13/10/1934 | LIV |
| Mentha aquatica x spicata = M. x piperita | GB, VC83 Midlothian, Haughhead | | University of Exeter | 29/9/1934 | LIV |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Oxted | Edward Charles Wallace | Watson Botanical Exchange Club Edward Charles Wallace | 10/9/1932 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Oxted | Edward Charles Wallace | Watson Botanical Exchange Club Edward Charles Wallace Job Edward Lousley | 10/9/1932 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Gomshall Marsh | Edward Charles Wallace | Watson Botanical Exchange Club Edward Charles Wallace Job Edward Lousley | 18/9/1928 | SLBI |