+ | Carex vulpina | GB, VC23 Oxfordshire, Otmoor | I J Thearle | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 1/8/1946 | MANCH |
| 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 suaveolens x longifolia = M. x rotundifolia var. webberi | GB, Perthshire, Perth | Henry Maurice Drummond-Hay | Druce Herbarium, Oxford Frederic Stratton Henry Maurice Drummond-Hay | 13/9/1871 | 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, VC14 East Sussex, Haywards Heath | R C Palmer | Druce Herbarium, Oxford | 1955 | 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 var. citrata | | | Druce Herbarium, Oxford | | OXF |
| Mentha aquatica x spicata = M. x piperita | Cultivated | James Walter White | Druce Herbarium, Oxford Edward Walter Hunnybun J Fraser | | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Pengersick Castle | James Cunnack | Druce Herbarium, Oxford | 8/1878 | OXF |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC1 West Cornwall, Penzance | William Curnow | Druce Herbarium, Oxford | 9/1878 | OXF |
| 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, 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, 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, VC19 North Essex, Maplestead | George Claridge Druce | Druce Herbarium, Oxford | 8/1905 | 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 | GB, VC20 Hertfordshire, Roydon | William Higgins Coleman | Druce Herbarium, Oxford J Fraser | 4/10/1843 | 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, VC36 Herefordshire, Ledbury | Spencer Henry Bickham | Druce Herbarium, Oxford Spencer Henry Bickham | 9/1931 | 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, 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 |
| Mentha aquatica x spicata = M. x piperita | GB, VC58 Cheshire, Knutsford,Plumbley | Charles Bailey | Druce Herbarium, Oxford | 15/9/1900 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC70 Cumberland, Melmerby | | Druce Herbarium, Oxford | 9/1920 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC79 Selkirkshire, Galashiels | Ida Margaret Hayward | Druce Herbarium, Oxford | 1913 | OXF |
| Mentha aquatica x spicata = M. x piperita | IE, VCH1 South Kerry, Kenmare | George Claridge Druce | Druce Herbarium, Oxford | 1927 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Saint Ives | William Curnow | Druce Herbarium, Oxford | 9/1878 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC2 East Cornwall, Looe | | Druce Herbarium, Oxford George Claridge Druce J Fraser | | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC2 East Cornwall, Tregawne, Withiel | Richard Vercoe Tellam | Druce Herbarium, Oxford | | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Kew Cultivated | John Gilbert Baker | Druce Herbarium, Oxford J Fraser John Gilbert Baker | 8/1866 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC19 North Essex, Alphamstone Cultivated | George Charles Brown | Druce Herbarium, Oxford J Fraser | 7/9/1916 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Crantock GB, VC23 Oxfordshire, Oxford Cultivated | J Fraser | Druce Herbarium, Oxford | 9/1915 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC36 Herefordshire, Great Doward | Augustin Ley | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford J Fraser | 7/9/1906 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC36 Herefordshire, Hereford | Augustin Ley | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford J Fraser | 8/1882 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC36 Herefordshire, Sellack | Augustin Ley | Druce Herbarium, Oxford J Fraser | 6/8/1887 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC36 Herefordshire, Underdown, Ledbury Cultivated | Spencer Henry Bickham | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford J Fraser Spencer Henry Bickham | 6/8/1906 | OXF |