| Phalaris arundinacea | GB, VC59 South Lancashire, Rufford | George Valentine Chapman Last | George Valentine Chapman Last | | K |
| Phalaris arundinacea | GB, VC69 Westmorland, Coniston | George Valentine Chapman Last | George Valentine Chapman Last | 5/7/1894 | K |
| Phlomis fruticosa | Cultivated | | George Valentine Chapman Last | 8/1943 | K |
| Plantago coronopus | GB, VC58 Cheshire, West Kirby | George Valentine Chapman Last | George Valentine Chapman Last | 11/5/1893 | K |
| Plantago coronopus | GB, VC59 South Lancashire, Southport | George Valentine Chapman Last | George Valentine Chapman Last | 7/1924 | K |
| Plantago lanceolata | GB, VC58 Cheshire, Leasowe | George Valentine Chapman Last | George Valentine Chapman Last | 17/5/1904 | K |
| Plantago lanceolata | GB, VC59 South Lancashire, Speke | George Valentine Chapman Last | George Valentine Chapman Last | 4/1939 | K |
| Plantago major subsp. major | GB, VC3 South Devon, Bovey Tracey | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1924 | K |
| Plantago major subsp. major | GB, VC58 Cheshire, Bidston Hill | George Valentine Chapman Last | George Valentine Chapman Last | 10/9/1904 | K |
| Plantago major subsp. major | GB, VC59 South Lancashire, Kirkby | George Valentine Chapman Last | George Valentine Chapman Last | 1898 | K |
| Plantago maritima | GB, VC49 Caernarvonshire, Cwm Idwal, Gribin | Hubert Frederick Dovaston | George Valentine Chapman Last | 7/8/1940 | K |
| Plantago maritima | GB, VC58 Cheshire, Hilbre Island | George Valentine Chapman Last | | 13/7/1894 | K |
| Plantago media | GB, VC64 Mid-west Yorkshire, Ingleton | George Valentine Chapman Last | George Valentine Chapman Last | 6/8/1894 | K |
| Plantago media | GB, VC69 Westmorland, Arnside | Wilson Crosfield Worsdell | George Valentine Chapman Last | 22/8/1895 | K |
| Polystichum lonchitis | GB, VC88 Mid Perthshire, Creag an Lochain | Wilson Crosfield Worsdell | George Valentine Chapman Last | 13/9/1895 | K |
| Polystichum lonchitis | GB, VC90 Angus, Glen Doll | Wilson Crosfield Worsdell | George Valentine Chapman Last | 16/7/1894 | K |
| 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 |
| Pyrola media | GB, VC90 Angus, Clova | Wilson Crosfield Worsdell | George Valentine Chapman Last | 23/7/1894 | K |
| Ranunculus arvensis | GB, VC22 Berkshire, Harwell | Alban Edward Lomax | George Valentine Chapman Last | 29/5/1891 | K |
| Ranunculus arvensis | GB, VC57 Derbyshire, Buxton | George Valentine Chapman Last | George Valentine Chapman Last | 7/1895 | K |
| Ranunculus arvensis | GB, VC59 South Lancashire, Great Crosby | George Valentine Chapman Last | George Valentine Chapman Last | 8/1895 | K |
+ | Ranunculus ophioglossifolius | GB, VC33 East Gloucestershire, Badgeworth | George Valentine Chapman Last | | 4/7/1939 | MANCH |
+ | Ranunculus ophioglossifolius | GB, VC33 East Gloucestershire, Badgeworth | George Valentine Chapman Last | | 4/7/1939 | MANCH |
| Scleranthus annuus | GB, VC58 Cheshire, Little Stanney | George Valentine Chapman Last | George Valentine Chapman Last | 21/9/1939 | K |
| Scleranthus annuus | GB, VC63 South-west Yorkshire, Cantley | Hubert Frederick Dovaston | George Valentine Chapman Last | 5/4/1943 | K |
| Scrophularia auriculata | GB, VC49 Caernarvonshire, Llandudno | George Valentine Chapman Last | George Valentine Chapman Last | 1/8/1938 | K |
| Scrophularia auriculata | GB, VC59 South Lancashire, Newburgh | George Valentine Chapman Last | George Valentine Chapman Last | 1/6/1939 | K |
| Scrophularia auriculata | GB, VC59 South Lancashire, Newburgh | George Valentine Chapman Last | George Valentine Chapman Last | 7/1893 | K |
| Scrophularia nodosa | GB, VC59 South Lancashire, Kirkby | George Valentine Chapman Last | George Valentine Chapman Last | 27/5/1894 | K |
| Scrophularia scorodonia | GB, VC1 West Cornwall, Newquay | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1922 | K |
| Scrophularia scorodonia | GB, VC113 Channel Islands, Guernsey | H F Doraslow | George Valentine Chapman Last | 21/7/1939 | K |
| Scrophularia umbrosa | GB, VC69 Westmorland, Appleby | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1939 | K |
| Scrophularia vernalis | GB, VC17 Surrey, Kew | Wilson Crosfield Worsdell | George Valentine Chapman Last | 14/5/1918 | K |
| Scutellaria galericulata | GB, VC59 South Lancashire, Speke | George Valentine Chapman Last | George Valentine Chapman Last | 1/7/1904 | K |
| Scutellaria galericulata | IE, VCH38 Co. Down, Warrenpoint | George Valentine Chapman Last | George Valentine Chapman Last | 19/8/1895 | K |
| Scutellaria minor | GB, VC49 Caernarvonshire, Beddgelert, Moel Lefn | George Valentine Chapman Last | George Valentine Chapman Last | 29/8/1941 | K |
| Scutellaria minor | IE, VCH2 North Kerry, Glenfleak | Wilson Crosfield Worsdell | George Valentine Chapman Last | 16/7/1896 | K |
| Sibthorpia europaea | GB, VC1 West Cornwall, Newlyn, Penzance | Wilson Crosfield Worsdell | George Valentine Chapman Last | 7/1922 | K |
| Silene conica | GB, VC13 West Sussex, Littlehampton | Wilson Crosfield Worsdell | George Valentine Chapman Last | 6/1925 | K |