| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Sennan | Frederick Robert Tennant | | 8/1899 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Sennen | Frederick Robert Tennant | | 8/1897 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Sennen Cove | William Curnow | | 9/1878 | LIV |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Sennen Cove | William Curnow | William Hunt Painter | 9/1878 | ABS |
| 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, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | | 15/8/1900 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | Allan Octavian Hume | 15/8/1900 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | Allan Octavian Hume | 12/9/1907 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey | 9/9/1907 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | Frederick Hamilton Davey | 9/9/1907 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC2 East Cornwall, Porthscatho | Christopher Donald Pigott | | 9/1947 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Charles Cardale Babington | 30/8/1881 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Charles Cardale Babington | 30/8/1881 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Harraton | Thomas Richard Archer Briggs | Allan Octavian Hume Frederick Townsend | 30/7/1878 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Honiton | George Thomas Harris | | 22/9/1927 | 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, VC3 South Devon, Otterton | Horace M Montford | | 19/9/1935 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC3 South Devon, Plymstock | Thomas Richard Archer Briggs | | 27/9/1876 | LIV |
| 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, 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, VC5 South Somerset, Hestercombe | Laurence Athelstan Molesworth Riley | Laurence Athelstan Molesworth Riley Riley | 4/10/1906 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC5 South Somerset, Kingston | Laurence Athelstan Molesworth Riley | Laurence Athelstan Molesworth Riley | 26/9/1906 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Bath Cultivated | William Sole | Samuel Goodenough | | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Compton Dando | Henry Francois Devis | | 27/8/1916 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Compton Dando | James Walter White | James Walter White William Hunt Painter | 2/9/1896 | ABS |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Compton Dando | James Walter White | William Hunt Painter | 1/8/1896 | ABS |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Dundry | George Henry Kendrick Thwaites | George Lloyd | 8/1846 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Dundry | George Henry Kendrick Thwaites | George Henry Kendrick Thwaites | 8/1846 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Langridge | | Charles Cardale Babington | 8/1833 | CGE |
| 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 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 arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Newton Saint Loe | Ida Mary Roper | Watson Botanical Exchange Club Spencer Henry Bickham | 13/9/1916 | CGE |
| 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, VC6 North Somerset, Rowberrow | James Walter White | | 23/8/1908 | LIV |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Rowberrow | James Walter White | Job Edward Lousley | 13/8/1915 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Rowberrow | James Walter White | | 13/8/1915 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Rowberrow | James Walter White | Charles Edward Britton | 23/8/1903 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Rowberrow | James Walter White | | 29/9/1927 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, Somerset | William Hudson William Sole | Carlisle Museum Herbarium Samuel Goodenough | | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, Somerset | William Sole | | | K |