+ | Lobelia urens | GB, VC3 South Devon, Kingsbridge (N of),Lixton | Arthur John Farmer | Arthur John Farmer | 19/8/1962 | MANCH |
+ | Lobelia urens | GB, VC3 South Devon, Kingsbridge (N of),Lixton | Arthur John Farmer | Arthur John Farmer | 19/8/1962 | MANCH |
| Luzula forsteri x pilosa = L. x borreri | GB, VC97 West Inverness-shire, Arisaig | Arthur John Farmer | Arthur John Farmer | 28/5/1969 | MANCH |
+ | Medicago minima | GB, VC25 East Suffolk, Felixstone | James Arden Whellan | Arthur John Farmer | 15/5/1944 | MANCH |
| Melica uniflora | GB, VC59 South Lancashire, Upholland | Arthur John Farmer | Arthur John Farmer | 23/5/1946 | MANCH |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC69 Westmorland, Pooly Bridge | Arthur John Farmer | | 24/8/1947 | MANCH |
+ | Mentha arvensis x aquatica = M. x verticillata | GB, VC69 Westmorland, Patterdale | Arthur John Farmer | Arthur John Farmer | 23/8/1947 | MANCH |
+ | Mentha arvensis x aquatica = M. x verticillata | GB, VC69 Westmorland, Patterdale | Arthur John Farmer | Arthur John Farmer | 4/8/1946 | MANCH |
+ | Mentha arvensis x aquatica = M. x verticillata | GB, VC69 Westmorland, Patterdale | Arthur John Farmer | Arthur John Farmer | 4/8/1946 | MANCH |
+ | Mentha pulegium | GB, VC3 South Devon, Slapton Ley | Arthur John Farmer | | 13/8/1962 | MANCH |
+ | Mentha spicata x suaveolens = M. x villosa | GB, VC59 South Lancashire, Caldinstone Park | Arthur John Farmer | | 20/8/1944 | MANCH |
+ | Mentha spicata x suaveolens = M. x villosa | GB, VC59 South Lancashire, Caldinstone Park | Arthur John Farmer | | 20/8/1944 | MANCH |
+ | Mentha suaveolens x longifolia = M. x rotundifolia | GB, VC3 South Devon, Salcombe | Arthur John Farmer | Arthur John Farmer | 12/8/1962 | MANCH |
+ | Mertensia maritima | GB, VC109 Caithness | Edward Charles Wallace | Arthur John Farmer | 8/9/1946 | MANCH |
+ | Mertensia maritima | GB, VC109 Caithness | Edward Charles Wallace | Arthur John Farmer | 8/9/1946 | MANCH |
+ | Meum athamanticum | | | Arthur John Farmer | | MANCH |
+ | Meum athamanticum | GB, VC49,VC50, Gwynedd(?) (North ), Conway Valley,Caernarvonshire, Denbighshire,Conway Valley,Pentre Folas | A Wilson John Dickinson Massey | Arthur John Farmer | 10/8/1937 | MANCH |
| Milium effusum | GB, VC59 South Lancashire, Upholland | Arthur John Farmer | Arthur John Farmer | 23/5/1946 | MANCH |
+ | Minuartia verna | GB, VC49 Caernarvonshire, Llanberis,Nant Peris | Arthur John Farmer | Arthur John Farmer | 9/6/1946 | MANCH |
+ | Monotropa hypopitys | GB, VC52 Anglesey | Arthur John Farmer | Arthur John Farmer | 3/8/1965 | MANCH |
+ | Monotropa hypopitys | GB, VC59 South Lancashire, Ainsdale | Arthur John Farmer | Arthur John Farmer | 30/8/1964 | MANCH |
+ | Monotropa hypopitys | GB, VC59 South Lancashire, Freshfield | Arthur John Farmer | Arthur John Farmer | 29/8/1944 | MANCH |
+ | Monotropa hypopitys | GB, VC59 South Lancashire, Freshfield | Arthur John Farmer | Arthur John Farmer | 13/8/1944 | MANCH |
| Narcissus tazetta x poeticus = N. x medioluteus | GB, VC58 Cheshire, Wirral Peninsula | George Valentine Chapman Last | Arthur John Farmer | 24/4/1942 | MANCH |
+ | Oenothera biennis x cambrica | GB, VC59 South Lancashire, Liverpool,Aigburth | Arthur John Farmer | Arthur John Farmer | 1/9/1946 | MANCH |
| Oenothera glazioviana x biennis = O. x fallax | GB, VC59 South Lancashire, Ainsdale | Arthur John Farmer | Arthur John Farmer | 30/8/1964 | MANCH |
+ | Oenothera glazioviana x cambrica = O. x britannica | GB, VC59 South Lancashire, Liverpool,Hightown | Arthur John Farmer | Arthur John Farmer | 14/9/1946 | MANCH |
| Orchis mascula | GB, VC108 West Sutherland, Achmelvich | Arthur John Farmer | Manchester Museum Arthur John Farmer | 27/5/1963 | MANCH |
| Paris quadrifolia | | John Dickinson Massey | Arthur John Farmer | 1/6/1923 | MANCH |
+ | Peucedanum ostruthium | | John Dickinson Massey | Arthur John Farmer John Dickinson Massey | 7/1922 | MANCH |
| Populus balsamifera x deltoides = P. x jackii | GB, VC59 South Lancashire, Formby Hills | Arthur John Farmer | Arthur John Farmer | 25/6/1964 | MANCH |
| Populus balsamifera x deltoides = P. x jackii | GB, VC59 South Lancashire, Freshfield | Arthur John Farmer | Arthur John Farmer | 21/5/1944 | MANCH |
+ | Populus balsamifera x deltoides = P. x jackii | GB, VC59 South Lancashire, Southport,Ainsdale | Arthur John Farmer | | 12/4/1964 | MANCH |
+ | Potentilla argentea | GB, VC59 South Lancashire, Huyton (near),Tarbock | Arthur John Farmer | | 5/8/1938 | MANCH |
+ | Potentilla fruticosa | GB, VC58 Cheshire | Arthur John Farmer | Pratt | 27/4/1946 | MANCH |
| Primula scotica | GB, VC108 West Sutherland, Bettyhill | George Valentine Chapman Last | Arthur John Farmer | 24/7/1939 | MANCH |
| Primula scotica | GB, VC109 Caithness, Holborn Head | George Valentine Chapman Last | Arthur John Farmer | 24/7/1939 | MANCH |
| Primula veris | GB, VC68 North Northumberland, Bamburgh | Arthur John Farmer | Arthur John Farmer | 10/5/1954 | MANCH |
| Primula vulgaris | GB, VC105 West Ross & Cromarty, Ullapool (Nw of),Achiltibuie | Arthur John Farmer | | 19/5/1963 | MANCH |
+ | Pyrola rotundifolia subsp. rotundifolia | GB, VC68 North Northumberland | Arthur John Farmer | Arthur John Farmer | 14/8/1970 | MANCH |