| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Goring Cultivated | Harry Joseph Riddelsdell | Druce Herbarium, Oxford | 2/9/1938 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC16 West Kent, Lamberhurst | John Richard Wallis | Druce Herbarium, Oxford | 8/1938 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC20 Hertfordshire, Harpenden Cultivated | Harry Joseph Riddelsdell | Arthur Langford Still Harry Joseph Riddelsdell | 8/1938 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC9 Dorset, Swanage | Richard Charles L'Estrange Burges | Druce Herbarium, Oxford | 1938 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Ivybridge | Norman Douglas Simpson | Norman Douglas Simpson | 24/9/1937 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Goring | Harry Joseph Riddelsdell | | 10/9/1937 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Oxford | | Druce Herbarium, Oxford | 8/9/1937 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Oxford | | Druce Herbarium, Oxford Arthur Langford Still | 6/9/1937 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Bishopston | Arthur Langford Still | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 3/9/1937 | 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 arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Parkmill, Gower | Arthur Langford Still | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 1/9/1937 | OXF |
| Mentha suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC90 Angus, Glamis | Arthur Langford Still Robert Henry Corstorphine | Edward Charles Wallace | 19/8/1937 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Wallington Cultivated GB, VC6 North Somerset, Weston in Gordano | Arthur Langford Still | | 8/1937 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC34 West Gloucestershire, Symonds Yat Cultivated | Arthur Langford Still | | 8/1937 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC21 Middlesex, Stanmore Common | Arthur Langford Still | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford Edward Charles Wallace | 19/9/1936 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Wallington Cultivated GB, VC20 Hertfordshire, Roydon | Arthur Langford Still | Botanical Exchange Club of The British Isles | 6/9/1936 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC34 West Gloucestershire, Lydbrook | Arthur Langford Still | | 28/8/1936 | 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, VC37 Worcestershire, Kidderminster | Richard Charles L'Estrange Burges | Druce Herbarium, Oxford | 1936 | 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 | GB, VC17 Surrey, Ewhurst | Edward Charles Wallace | Botanical Exchange Club of The British Isles | 22/9/1935 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace | 16/9/1934 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Holmwood Common | Edward Charles Wallace | Edward Charles Wallace | 1/9/1934 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC11 South Hampshire, Blashford | Patrick Martin Hall | Patrick Martin Hall | 26/8/1934 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Alfrick Cultivated | Job Edward Lousley | Botanical Exchange Club of The British Isles | 19/8/1934 | OXF |
| Mentha spicata x suaveolens = M. x villosa | GB, VC17 Surrey, Kew Cultivated GB, VC93 North Aberdeenshire, New Aberdour | J Fraser | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford J Fraser | 10/8/1934 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Leith Hill | Edward Charles Wallace | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford Edward Charles Wallace | 6/8/1934 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC17 Surrey, Chiddingfold | Job Edward Lousley | | 30/9/1933 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Shalford Pond | Rowland John Burdon | Botanical Society & Exchange Club of The British Isles | 5/9/1933 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Shalford | Edward Charles Wallace | Edward Charles Wallace | 2/9/1933 | OXF |
| Mentha spicata x suaveolens = M. x villosa | GB, VC17 Surrey, Kew Cultivated GB, VC93 North Aberdeenshire, New Aberdour | J Fraser | | 12/8/1933 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC56 Nottinghamshire, Nottingham Cultivated | R Bulley | R Bulley | 8/1933 | 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 spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC111 Orkney, Papa Westray | Henry Halcro Johnston | George Claridge Druce | 31/8/1932 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Broadham Green | Charles Edward Britton | Charles Edward Britton | 15/8/1932 | OXF |
| Mentha spicata x suaveolens = M. x villosa | GB, VC22 Berkshire, Cothill | Percival George Beak | Percival George Beak | 15/8/1932 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC28 West Norfolk, Harling | T Peace | | 8/1932 | 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 suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC111 Orkney, Melsetter | George Claridge Druce | | 8/1931 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC106 East Ross & Cromarty, Strathorrin | George Claridge Druce Robert Henry Corstorphine | | 1931 | OXF |