| Sium latifolium | GB, VC15 East Kent, Romney Marsh | Wilson Crosfield Worsdell | George Valentine Chapman Last | 4/9/1930 | K |
| Stachys arvensis | GB, VC69 Westmorland, Arnside | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1920 | K |
| Stachys arvensis | GB, VC60,VC69, Arnside | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1920 | K |
| Stachys germanica | GB, VC22 Berkshire, Oxford Cultivated | George Valentine Chapman Last | George Valentine Chapman Last | 1938 | K |
| Stachys germanica | GB, VC23 Oxfordshire | | George Valentine Chapman Last | 7/7/1929 | K |
| Stachys officinalis | GB, VC62 North-east Yorkshire, Saltersgate | George Valentine Chapman Last | George Valentine Chapman Last | 29/7/1939 | K |
| Stachys officinalis | GB, VC69 Westmorland, Arnside | Wilson Crosfield Worsdell | George Valentine Chapman Last | 12/8/1896 | K |
| Stachys palustris | GB, VC58 Cheshire, Bromborough | George Valentine Chapman Last | George Valentine Chapman Last | 2/8/1894 | K |
| Stachys palustris | GB, VC69 Westmorland, Bowness on Windermere | M C Morsdell | George Valentine Chapman Last | 1/8/1944 | K |
| Stachys sylvatica | GB, VC6 North Somerset, Bath | Wilson Crosfield Worsdell | George Valentine Chapman Last | 9/1908 | K |
| Stachys sylvatica | GB, VC58 Cheshire, Seacombe | George Valentine Chapman Last | George Valentine Chapman Last | 28/5/1893 | K |
| Stachys sylvatica | GB, VC58 Cheshire, Wallasey | George Valentine Chapman Last | George Valentine Chapman Last | 8/1893 | K |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC1 West Cornwall, Newlyn Downs | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1922 | K |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC1 West Cornwall, Newlyn, Penzance | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1922 | K |
| Stellaria palustris | GB, VC63 South-west Yorkshire, Thorne | Hubert Frederick Dovaston | George Valentine Chapman Last | 20/6/1943 | K |
| Tephroseris integrifolia | GB, VC8 South Wiltshire, Salisbury Plain | Frederick Kirkwood Makins | George Valentine Chapman Last | 30/5/1940 | K |
| Tephroseris integrifolia | GB, VC8 South Wiltshire, Westbury | Wilson Crosfield Worsdell | George Valentine Chapman Last | 2/6/1902 | K |
| Tephroseris integrifolia | GB, VC52 Anglesey, South Stack, Ty'n Nant | James Arden Whellan | George Valentine Chapman Last | 2/6/1940 | K |
| Teucrium botrys | GB, VC12 North Hampshire, Micheldever | Wilson Crosfield Worsdell | George Valentine Chapman Last | 8/1929 | K |
| Teucrium botrys | GB, VC17 Surrey, Caterham | Wilson Crosfield Worsdell | George Valentine Chapman Last | 6/1892 | K |
| Teucrium scordium | | | Alban Edward Lomax George Valentine Chapman Last | 1890 | K |
| Teucrium scordium | GB, VC4 North Devon, Braunton Burrows | Wilson Crosfield Worsdell | George Valentine Chapman Last | 8/1922 | K |
| Teucrium scordium | GB, VC4 North Devon, Braunton Burrows | Wilson Crosfield Worsdell | George Valentine Chapman Last | 8/1922 | K |
| Teucrium scorodonia | GB, VC3 South Devon, Bovey Tracey | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1924 | K |
| Teucrium scorodonia | GB, VC58 Cheshire, Hilbre Island | George Valentine Chapman Last | George Valentine Chapman Last | 7/9/1904 | K |
| Thymus chamaedrys | GB, VC15 East Kent, Wye | Wilson Crosfield Worsdell | George Valentine Chapman Last | 8/7/1931 | K |
| Thymus praecox subsp. arcticus | GB, VC47 Montgomeryshire, Llangynog | George Valentine Chapman Last | George Valentine Chapman Last | 5/7/1894 | K |
| Thymus praecox subsp. arcticus | GB, VC58 Cheshire, New Brighton | George Valentine Chapman Last | George Valentine Chapman Last | 7/1893 | K |
| Torilis arvensis | GB, VC20 Hertfordshire, Hitchin | George Valentine Chapman Last | George Valentine Chapman Last | 7/1937 | K |
| Verbascum lychnitis var. album | GB, VC3 South Devon, Hennock | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1924 | K |
| Verbascum lychnitis var. album | GB, VC3 South Devon, Hennock | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1924 | K |
| Verbascum lychnitis | GB, VC50 Denbighshire, Marford | George Valentine Chapman Last | George Valentine Chapman Last | 1/8/1940 | K |
| Verbascum lychnitis var. album | GB, VC50 Denbighshire, Marford | George Valentine Chapman Last | George Valentine Chapman Last | 1/8/1940 | K |
| Verbascum nigrum | GB, VC17 Surrey, Hampton Court | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1892 | K |
| Verbascum nigrum | GB, VC38 Warwickshire, Kenilworth | Forrest | George Valentine Chapman Last | 1891 | K |
| Verbascum nigrum | GB, VC59 South Lancashire, Liverpool | George Valentine Chapman Last | George Valentine Chapman Last | 28/7/1942 | K |
| Verbascum pulverulentum | GB, VC27 East Norfolk, Hellesdon | Alban Edward Lomax | George Valentine Chapman Last | 7/1899 | K |
| Verbascum pulverulentum | GB, VC27 East Norfolk, Norwich | Harwood | George Valentine Chapman Last | 1838 | K |
| Verbascum thapsus | GB, VC3 South Devon, Crediton | George Valentine Chapman Last | George Valentine Chapman Last | 8/1924 | K |
| Verbascum thapsus | GB, VC58 Cheshire, Meols | George Valentine Chapman Last | George Valentine Chapman Last | 22/7/1895 | K |