| Mentha aquatica x spicata = M. x piperita | GB, VC57 Derbyshire, Bradford Dale | H J Killick | Druce Herbarium, Oxford | 28/8/1999 | OXF |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC47 Montgomeryshire, Pen-y-bont-fawr | H J Killick | Druce Herbarium, Oxford | 20/8/1999 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC22 Berkshire, Didcot | Richard Charles Palmer | Druce Herbarium, Oxford | 8/8/1998 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC38 Warwickshire, Sutton Park | Richard Charles Palmer | Druce Herbarium, Oxford | 16/9/1995 | OXF |
| Mentha spicata x suaveolens = M. x villosa | GB, VC23 Oxfordshire, Culham | Richard Charles Palmer | | 17/7/1976 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC22 Berkshire, Didcot | Richard Charles Palmer | | 29/8/1975 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC22,VC23, Clanfield | Richard Charles Palmer | | 4/9/1970 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Horley | Richard Charles Palmer | Druce Herbarium, Oxford | 27/9/1969 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC23 Oxfordshire, Risinghurst | Richard Charles Palmer | Druce Herbarium, Oxford | 27/8/1968 | OXF |
| Mentha spicata x suaveolens = M. x villosa | GB, VC23 Oxfordshire, Oxford | Humphrey John Moule Bowen | Druce Herbarium, Oxford | 30/7/1965 | 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, 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 spicata x longifolia = M. x villosonervata | GB, VC112 Shetland, Lerwick | Richard Charles Palmer | Druce Herbarium, Oxford | 15/8/1960 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Oxford | Richard Charles Palmer | Druce Herbarium, Oxford | 8/1958 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC14 East Sussex, Haywards Heath | Richard Charles Palmer | Oxford University Herbarium | 1958 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC14 East Sussex, Groomsbridge | Richard Charles Palmer | Druce Herbarium, Oxford | 9/1956 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC14 East Sussex, Haywards Heath | R C Palmer | Druce Herbarium, Oxford | 1955 | OXF |
| Mentha suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC90 Angus, Arbroath | Ursula Katherine Duncan | Ursula Katherine Duncan | 8/1954 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC14 East Sussex, Sheepscote Valley | Richard Charles Palmer | Druce Herbarium, Oxford | 14/8/1953 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC64 Mid-west Yorkshire, Howgill | R C Palmer | Druce Herbarium, Oxford | 9/1952 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC64 Mid-west Yorkshire, Buckden | Richard Charles Palmer | Druce Herbarium, Oxford | 30/8/1952 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC21 Middlesex, Northwood Cultivated | Rex Alan Henry Graham | Rex Alan Henry Graham | 16/8/1952 | OXF |
| Mentha suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC21 Middlesex, Northwood | Rex Alan Henry Graham | Rex Alan Henry Graham | 15/8/1952 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC40 Shropshire, Clun Church | Richard Charles Palmer | Druce Herbarium, Oxford | 4/9/1951 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Sanderstead | | Botanical Society of The British Isles Donald Peter Young | 14/8/1951 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC28 West Norfolk, Dersingham | Eric Lister Swann | | 31/8/1950 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC28 West Norfolk, Roydon Common | Eric Lister Swann | Botanical Society of The British Isles Eric Lister Swann | 29/8/1950 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC28 West Norfolk, Roydon Common | Eric Lister Swann | Eric Lister Swann | 29/8/1950 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC70 Cumberland, Skinwith Beck | Clara Winsome Muirhead | Carlisle Museum Herbarium | 27/8/1949 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC13 West Sussex, Bexley Hill | Edward Charles Wallace | | 22/8/1948 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC64 Mid-west Yorkshire, Nunwick | Catherine Muriel Rob | Botanical Society of The British Isles Druce Herbarium, Oxford Catherine Muriel Rob | 11/9/1947 | 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, VC98 Argyllshire, Ballachulish | Edmund Frederic Warburg | Druce Herbarium, Oxford Edmund Frederic Warburg | 28/8/1947 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC98 Argyllshire, Ballachulish | Edmund Frederic Warburg | Druce Herbarium, Oxford | 28/8/1947 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC41 Glamorganshire, Cardiff | Arthur Edward Wade | Botanical Society & Exchange Club of The British Isles | 26/8/1947 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC87 West Perthshire, Kennetpans | Edmund Frederic Warburg | Druce Herbarium, Oxford | 21/8/1947 | 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 spicata x suaveolens = M. x villosa | GB, VC22 Berkshire, East Hagbourne | Harry Joseph Riddelsdell | | 11/9/1938 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Cleeve, Goring | Harry Joseph Riddelsdell | | 5/9/1938 | OXF |