| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Pengersick Castle | James Cunnack | Druce Herbarium, Oxford | 8/1878 | OXF |
| Mentha dumetorum | GB, VC1 West Cornwall, Pengersick Castle | | James Cunnack William Hunt Painter | 8/1878 | ABS |
| Mentha spicata | GB, VC1 West Cornwall, Pengersick Castle | William Curnow | Shewsbury Public Library | | K |
| Mentha x piperita | GB, VC1 West Cornwall, Pengersick Castle | James Cunnack | | 7/1878 8/1878 | K |
| Mentha pulegium | GB, VC1 West Cornwall, Penhale Point | Job Edward Lousley | Job Edward Lousley | 19/9/1936 | K |
| Mentha pulegium | GB, VC1 West Cornwall, Penhale Point | Edgar Thurston | Edgar Thurston | 13/8/1914 | K |
| Mentha pulegium | GB, VC1 West Cornwall, Penhale Point | Edgar Thurston | Edgar Thurston | 13/8/1914 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Penhallow | Francis Rilstone | Botanical Exchange Club of The British Isles | 8/9/1934 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Penhallow | Francis Rilstone | Botanical Exchange Club of The British Isles | 8/9/1934 | SLBI |
| Mentha arvensis | GB, VC1 West Cornwall, Penwartha | Edgar Thurston | Edgar Thurston | 26/7/1916 | K |
| Mentha aquatica | GB, VC1 West Cornwall, Penzance | John Kenneth Morton | John Kenneth Morton | 10/9/1956 | K |
| Mentha aquatica | GB, VC1 West Cornwall, Penzance | John Kenneth Morton | John Kenneth Morton | 10/9/1956 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Penzance | Edgar A Rees | Druce Herbarium, Oxford | 7/10/1923 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Penzance | William Curnow | | 9/1878 | LIV |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC1 West Cornwall, Penzance | William Curnow | Druce Herbarium, Oxford | 9/1878 | OXF |
| Mentha spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Penzance | | C K Jones-Parry | 8/1983 | LIV |
| Mentha suaveolens x longifolia = M. x rotundifolia | GB, VC1 West Cornwall, Penzance | William Curnow | William Hunt Painter | 8/1879 | ABS |
| Mentha suaveolens x longifolia = M. x rotundifolia | GB, VC1 West Cornwall, Penzance Cultivated | William Curnow | William Hunt Painter | 9/1880 | ABS |
| Mentha suaveolens x longifolia = M. x rotundifolia | GB, VC1 West Cornwall, Penzance | William Curnow | Hugh Neville Dixon Leslie Beeching Hall | 8/1886 | SLBI |
| Mentha aquatica | GB, VC1 West Cornwall, Perranarworthal | Job Edward Lousley | Job Edward Lousley | 14/9/1936 | SLBI |
| Mentha aquatica | GB, VC1 West Cornwall, Perranarworthal | Job Edward Lousley | Job Edward Lousley | 14/9/1936 | SLBI |
| Mentha aquatica | GB, VC1 West Cornwall, Perranarworthal | Job Edward Lousley | Job Edward Lousley | 14/9/1936 | SLBI |
| Mentha aquatica | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 10/9/1956 | K |
| Mentha aquatica | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 27/9/1962 | K |
| Mentha aquatica | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 27/9/1962 | K |
| Mentha aquatica | GB, VC1 West Cornwall, Perranarworthal Cultivated | John Kenneth Morton | John Kenneth Morton | 20/6/1973 | K |
| Mentha aquatica | GB, VC1 West Cornwall, Perranarworthal GB, VC17 Surrey, Egham Cultivated | John Kenneth Morton | John Kenneth Morton | 31/8/1973 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | | 4/9/1911 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | | 4/9/1911 | OXF |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Watson Botanical Exchange Club Charles Edward Britton Frederick Hamilton Davey | 16/8/1911 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey Spencer Henry Bickham | 3/8/1911 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Allan Octavian Hume Frederick Hamilton Davey | 16/8/1911 | SLBI |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 27/9/1962 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 12/8/1975 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Perranarworthal | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 22/8/1935 | SLBI |
| Mentha spicata | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 10/9/1956 | K |
| Mentha x maximilianea | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Watson Botanical Exchange Club Albert Bruce Jackson Frederick Hamilton Davey | 4/9/1911 | K |
| Mentha x maximilianea | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 10/9/1956 | K |
| Mentha x maximilianea | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 27/9/1962 | K |
| Mentha x maximilianea | GB, VC1 West Cornwall, Perranarworthal | John Kenneth Morton | John Kenneth Morton | 27/9/1962 | K |