+ | Hypericum linariifolium | GB, VC49 Caernarvonshire | Hubert Frederick Dovaston | Arthur John Farmer George Valentine Chapman Last | 1941 | MANCH |
| Hypochaeris glabra | GB, VC4 North Devon, Ilfracombe | George Valentine Chapman Last | | 6/1924 | K |
| Hyssopus officinalis | GB, VC59 South Lancashire, Liverpool Cultivated | George Valentine Chapman Last | George Valentine Chapman Last | 9/1941 | K |
| Hyssopus officinalis | GB, VC59 South Lancashire, Liverpool Cultivated | George Valentine Chapman Last | George Valentine Chapman Last | 9/1941 | K |
| Kickxia elatine subsp. elatine | GB, VC3 South Devon, Bovey Tracey | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1924 | K |
| Kickxia spuria | GB, VC14 East Sussex, Warbleton | Charles Edgar Salmon | George Valentine Chapman Last | 30/6/1892 | K |
| Kickxia spuria | GB, VC15 East Kent, Westwell | Wilson Crosfield Worsdell | George Valentine Chapman Last | 6/9/1930 | K |
| Lamium album | GB, VC50 Denbighshire, Overton | George Valentine Chapman Last | George Valentine Chapman Last | 22/5/1893 | K |
| Lamium amplexicaule | GB, VC29 Cambridgeshire, Cambridge | Percy | George Valentine Chapman Last | 1832 | K |
| Lamium amplexicaule | GB, VC59 South Lancashire, Freshfield | George Valentine Chapman Last | George Valentine Chapman Last | 1/5/1939 | K |
| Lamium amplexicaule | GB, VC59 South Lancashire, Speke | George Valentine Chapman Last | George Valentine Chapman Last | 5/8/1895 | K |
| Lamium maculatum | GB, VC59 South Lancashire, Freshfield | George Valentine Chapman Last | George Valentine Chapman Last | 23/5/1941 | K |
| Lamium purpureum var. incisum | GB, VC3 South Devon, Bovey Tracey | Wilson Crosfield Worsdell | George Valentine Chapman Last | 5/1924 | K |
| Lamium purpureum var. incisum | GB, VC58 Cheshire, Bromborough | George Valentine Chapman Last | George Valentine Chapman Last | 5/5/1895 | K |
| Lamium purpureum var. hybridum | GB, VC59 South Lancashire, Birkdale | George Valentine Chapman Last | George Valentine Chapman Last | 28/5/1942 | K |
| Lamium purpureum var. hybridum | GB, VC59 South Lancashire, Blundellsands | George Valentine Chapman Last | George Valentine Chapman Last | 20/4/1922 | K |
| Lavandula angustifolia x latifolia = L. x intermedia | Cultivated | George Valentine Chapman Last | George Valentine Chapman Last | 22/7/1895 | K |
| Leonurus cardiaca | GB, VC58 Cheshire, Birkenhead,Storeton | George Valentine Chapman Last | George Valentine Chapman Last | 3/9/1942 | K |
| Leonurus cardiaca | GB, VC113 Channel Islands, Sark La Ville Roussel | Francis Ballard | George Valentine Chapman Last | 24/7/1930 | K |
| Ligustrum vulgare | GB, VC6 North Somerset, Midford | George Valentine Chapman Last | George Valentine Chapman Last | 14/7/1905 | K |
| Ligustrum vulgare | GB, VC11 South Hampshire, Christchurch | George Valentine Chapman Last | George Valentine Chapman Last | 28/6/1937 | K |
| Ligustrum vulgare | GB, VC69 Westmorland, Lindale | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1893 | K |
| Limosella aquatica | GB, VC17 Surrey, Esher | Wilson Crosfield Worsdell | George Valentine Chapman Last | 30/7/1917 | K |
| Limosella australis | GB, VC48 Merionethshire, Glaslyn | Hubert Frederick Dovaston | George Valentine Chapman Last | 2/8/1941 | K |
| Limosella australis | GB, VC48 Merionethshire, Minffordd | James Arden Whellan | George Valentine Chapman Last | 9/7/1940 | K |
| Linaria genistifolia subsp. dalmatica | GB, VC7 North Wiltshire, Swindon | | George Valentine Chapman Last | 3/7/1932 | K |
| Linaria purpurea | GB, VC69 Westmorland, Furness Abbey | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1900 | K |
| Linaria repens | GB, VC22 Berkshire, Reading | Albert Bruce Jackson | George Valentine Chapman Last | 8/1903 | K |
| Linaria repens | GB, VC58 Cheshire, Caldy | George Valentine Chapman Last | George Valentine Chapman Last | 1/8/1938 | K |
| Linaria vulgaris | GB, VC3 South Devon, Bovey Tracey | Wilson Crosfield Worsdell | George Valentine Chapman Last | 8/1924 | K |
| Linaria vulgaris | GB, VC10 Isle of Wight, Cowes | James Walter Long | Botanical Exchange Club of The British Isles George Valentine Chapman Last | 30/9/1929 | K |
| Linaria vulgaris | GB, VC59 South Lancashire, Hightown | George Valentine Chapman Last | George Valentine Chapman Last | 23/9/1904 | K |
| Linaria vulgaris x repens = L. x sepium | GB, VC22 Berkshire, Reading | Albert Bruce Jackson | George Valentine Chapman Last | 8/1903 | K |
| Linaria vulgaris x repens = L. x sepium | GB, VC22 Berkshire, Reading | Albert Bruce Jackson | George Valentine Chapman Last | 8/1903 | K |
| Lycopus europaeus | GB, VC59 South Lancashire, Hightown | George Valentine Chapman Last | George Valentine Chapman Last | 26/8/1894 | K |
| Marrubium vulgare | GB, VC9 Dorset, Studland | Wilson Crosfield Worsdell | George Valentine Chapman Last | 10/7/1935 | K |
| Marrubium vulgare | GB, VC58 Cheshire, Caldy | George Valentine Chapman Last | George Valentine Chapman Last | 1/8/1895 | K |
| Melissa officinalis | Cultivated | George Valentine Chapman Last | George Valentine Chapman Last | 23/8/1895 | K |
| Melissa officinalis | GB, VC3 South Devon, Liverton | Wilson Crosfield Worsdell | George Valentine Chapman Last | 8/1924 | K |
| Melittis melissophyllum | GB, VC46,VC44, Ceri Valley | James Arden Whellan | George Valentine Chapman Last | 3/7/1941 | K |