| Lamium galeobdolon subsp. montanum | GB, VC33 East Gloucestershire, Guiting Power | Clifford Charles Townsend | | 17/5/1947 | K |
| Lamium galeobdolon subsp. montanum | GB, VC33 East Gloucestershire, The Hewletts | Clifford Charles Townsend | Clifford Charles Townsend | 5/5/1949 | K |
| Lamium hybridum | GB, VC52 Anglesey, Holyhead | Clifford Charles Townsend | Clifford Charles Townsend | 9/7/1952 | K |
| Lamium maculatum | GB, VC33 East Gloucestershire, Prestbury | Clifford Charles Townsend | Clifford Charles Townsend | 8/6/1951 | K |
| Lamium purpureum var. hybridum | GB, VC29 Cambridgeshire, Cambridge | Clifford Charles Townsend | Clifford Charles Townsend | 28/10/1957 | K |
| Lamium purpureum var. incisum | GB, VC33 East Gloucestershire, Cheltenham | Clifford Charles Townsend | Clifford Charles Townsend | 16/4/1947 | K |
| Lamium purpureum var. hybridum | GB, VC33 East Gloucestershire, Hucclecote | Clifford Charles Townsend | | 15/5/1950 | K |
| Lamium purpureum var. hybridum | GB, VC33 East Gloucestershire, Hucclecote | Clifford Charles Townsend | Clifford Charles Townsend | 15/5/1950 | K |
| Lamium purpureum var. hybridum | GB, VC45 Pembrokeshire, Skrinkle Haven | Clifford Charles Townsend | Clifford Charles Townsend | 18/8/1954 | K |
| Limosella aquatica | GB, VC33 East Gloucestershire, Upper Lode | Clifford Charles Townsend | Clifford Charles Townsend | 7/8/1951 | K |
| Limosella aquatica | GB, VC38 Warwickshire, Earlswood Reservoir | Clifford Charles Townsend | Clifford Charles Townsend | 15/11/1953 | K |
| Linaria | GB, VC33 East Gloucestershire, Charlton Kings | Clifford Charles Townsend | | 7/6/1947 | K |
| Linaria pelisseriana | GB, VC6 North Somerset, Shapwick | V I Ricketts | Clifford Charles Townsend | 1959 | K |
| Linaria purpurea | GB, VC36 Herefordshire, Hereford | Clifford Charles Townsend | Clifford Charles Townsend | 8/10/1949 | K |
| Linaria repens | GB, VC22 Berkshire, Berkshire Downs | Clifford Charles Townsend | Clifford Charles Townsend | 29/7/1946 | K |
| Linaria repens | GB, VC33 East Gloucestershire, Andoversford | Clifford Charles Townsend | Clifford Charles Townsend | 5/8/1950 | K |
| Linaria repens | GB, VC49 Caernarvonshire, Llanrwst | Clifford Charles Townsend | Clifford Charles Townsend | 3/7/1952 | K |
| Linaria vulgaris | GB, VC22 Berkshire, Sulham | Leonard H Williams | Clifford Charles Townsend | 12/7/1953 | K |
| Linaria vulgaris | GB, VC33 East Gloucestershire, Mythe Tute | Clifford Charles Townsend | | 23/8/1948 | K |
| Linaria vulgaris | GB, VC34 West Gloucestershire, Highleadon | Clifford Charles Townsend | Clifford Charles Townsend | 28/8/1950 | K |
| Melissa officinalis | GB, VC33 East Gloucestershire, Leckhampton | Clifford Charles Townsend | Clifford Charles Townsend | 15/8/1951 | K |
| Mentha aquatica var. denticulata | GB, VC4 North Devon, Braunton Burrows | Clifford Charles Townsend | Clifford Charles Townsend | 23/6/1950 | K |
| Mentha aquatica | GB, VC33 East Gloucestershire, Badgeworth | Clifford Charles Townsend | Clifford Charles Townsend | 14/8/1950 | K |
| Mentha aquatica | GB, VC33 East Gloucestershire, Kempsford | Clifford Charles Townsend | Clifford Charles Townsend | 25/8/1951 | K |
| Mentha aquatica | GB, VC33 East Gloucestershire, Lower Slaughter | | Clifford Charles Townsend | 23/8/1952 | K |
| Mentha aquatica var. hirsuta | GB, VC33 East Gloucestershire, Walham | | Clifford Charles Townsend | 18/8/1951 | K |
| Mentha aquatica | GB, VC33 East Gloucestershire, Walham | Clifford Charles Townsend | | 6/9/1947 | K |
| Mentha aquatica var. major | GB, VC34 West Gloucestershire, Highleadon | Clifford Charles Townsend | Clifford Charles Townsend | 28/8/1950 | K |
| Mentha aquatica | GB, VC34 West Gloucestershire, Highleadon | Clifford Charles Townsend | Clifford Charles Townsend | 28/8/1950 | K |
| Mentha aquatica | GB, VC34 West Gloucestershire, Longhope | Clifford Charles Townsend | Clifford Charles Townsend | 30/8/1950 | K |
| Mentha aquatica var. lobeliana | GB, VC34 West Gloucestershire, Ruspidge | Clifford Charles Townsend | Clifford Charles Townsend | 29/8/1950 | K |
| Mentha aquatica var. lobeliana | GB, VC34 West Gloucestershire, Ruspidge | Clifford Charles Townsend | Clifford Charles Townsend | 5/10/1949 | K |
| Mentha aquatica | GB, VC34 West Gloucestershire, Upleadon | Clifford Charles Townsend | Clifford Charles Townsend | 28/8/1950 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC47 Montgomeryshire, Llansantffraid | Clifford Charles Townsend | | 8/9/1987 | K |
| Mentha arvensis | GB, VC6 North Somerset, Street | Clifford Charles Townsend | | 21/8/1962 | K |
| Mentha arvensis var. obtusifolia | GB, VC33 East Gloucestershire, Andoversford | Clifford Charles Townsend | Clifford Charles Townsend | 5/8/1950 | K |
| Mentha arvensis var. obtusifolia | GB, VC33 East Gloucestershire, Andoversford | Clifford Charles Townsend | Clifford Charles Townsend | 5/8/1950 | K |
| Mentha arvensis var. obtusifolia | GB, VC33 East Gloucestershire, Andoversford | Clifford Charles Townsend | Clifford Charles Townsend | 5/8/1950 | K |
| Mentha arvensis | GB, VC33 East Gloucestershire, Ashchurch | Clifford Charles Townsend | Clifford Charles Townsend | 23/8/1948 | K |
| Mentha arvensis | GB, VC33 East Gloucestershire, Cleeve Hill | Clifford Charles Townsend | Clifford Charles Townsend | 4/8/1952 | K |