| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC33 East Gloucestershire, Coates | Edgar Wolston Bertram Handsley Milne-Redhead | | 27/8/1945 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC17 Surrey, Nutfield | John Richard Wallis | John Richard Wallis | 4/9/1943 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC21 Middlesex, Harefield | Francis Morland Day | | 5/8/1942 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Kingskerswell | Francis Morland Day Thomas Stephenson | | 12/8/1940 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC36 Herefordshire, Hereford | Francis Morland Day | | 30/9/1939 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Totnes | Francis Morland Day | Job Edward Lousley Arthur Langford Still | 17/9/1938 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Stoke Gabriel | Francis Morland Day | | 11/9/1938 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Pensford | Henry Haselfoot Haines | | 6/8/1938 | ABS |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC36 Herefordshire, Wellington | Francis Morland Day | | 28/9/1937 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC37 Worcestershire, Blakedown | Job Edward Lousley | Job Edward Lousley | 19/9/1937 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC14 East Sussex, Bexhill | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 22/8/1937 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC33 East Gloucestershire, Compton Abdale | Francis Morland Day | | 21/8/1937 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Goonbell Halt | Job Edward Lousley | Job Edward Lousley | 14/9/1936 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Perranworthal, Tresamble | Job Edward Lousley | Job Edward Lousley | 14/9/1936 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Tresamble | Job Edward Lousley | Job Edward Lousley | 14/9/1936 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC33 East Gloucestershire, Compton Abdale | John Patrick Micklethwait Brenan | | 10/4/1936 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC37 Worcestershire, Malvern, Barnard's Green | Francis Morland Day | | 24/9/1935 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC17 Surrey, Reigate | Edward Charles Wallace | Edward Charles Wallace | 21/9/1935 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Otterton | Horace M Montford | | 19/9/1935 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC12 North Hampshire, Liphook | Edward Charles Wallace | Edward Charles Wallace | 15/9/1935 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC12 North Hampshire, Waggoners Wells | Edward Charles Wallace | Job Edward Lousley | 15/9/1935 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC17 Surrey, North Holmwood | Arthur Langford Still | | 2/9/1935 | SLBI |
| Mentha rubra | GB, VC17 Surrey, North Holmwood | Arthur Langford Still | Harold Stuart Thompson | 2/9/1935 | BIRM |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC46 Cardiganshire, Aberystwyth, Dorglwyd | Job Edward Lousley | Job Edward Lousley | 28/8/1935 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC12 North Hampshire, Winchfield Cultivated | Arthur Langford Still | Job Edward Lousley | 26/8/1935 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC33 East Gloucestershire, Compton Abdale | Job Edward Lousley | Job Edward Lousley | 24/8/1935 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Litton | Harold Stuart Thompson | Harold Stuart Thompson | 22/8/1935 | BIRM |
| Mentha rubra | GB, VC6 North Somerset, Litton | Harold Stuart Thompson | Harold Stuart Thompson | 22/8/1935 | BIRM |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Litton | Harold Stuart Thompson | Botanical Exchange Club of The British Isles | 12/8/1935 to 22/8/1935 | K |
| Mentha rubra | GB, VC6 North Somerset, Chewton Mendip | Harold Stuart Thompson | Harold Stuart Thompson Rex Alan Henry Graham Arthur Langford Still | 12/8/1935 to 22/8/1935 | BIRM |
| Mentha rubra | GB, VC6 North Somerset, Litton Upper Reservoir | Harold Stuart Thompson | Arthur Langford Still Harold Stuart Thompson | 12/8/1935 | BIRM |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC36 Herefordshire, Colwall | Francis Morland Day | | 10/1934 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC12 North Hampshire, Fleet | G A R Watts | J Fraser | 10/9/1934 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC35 Monmouthshire, Kymin Hill | Samuel George Charles | National Museum of Wales | 9/1934 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC29 Cambridgeshire, Bourn | Job Edward Lousley | Job Edward Lousley | 19/8/1934 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 11/8/1934 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC41 Glamorganshire, Llangennith | Eleanor Vachell | J Fraser | 1934 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC17 Surrey, Oxted | Stafford Edwin Chandler | Croydon Natural History and Scientific Society Stafford Edwin Chandler | 17/9/1933 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC34 West Gloucestershire, Golden Valley | Cecil Ivry Sandwith Noel Yvri Sandwith | | 11/9/1933 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC17 Surrey, Leigh | Edward Charles Wallace | Edward Charles Wallace Job Edward Lousley | 6/9/1933 | SLBI |