| Viola riviniana | GB, VC14 East Sussex, Nobody's Wood | William Charles Richard Watson | William Charles Richard Watson | 12/4/1946 | SLBI |
| Viola riviniana var. flavicornis | GB, VC16 West Kent, Bromley | | William Charles Richard Watson | 4/5/1946 | SLBI |
| Viola riviniana | GB, VC16 West Kent, Farningham | William Charles Richard Watson | William Charles Richard Watson | 11/5/1946 | SLBI |
| Viola riviniana | GB, VC17 Surrey, Coulsdon | | William Charles Richard Watson | 30/4/1946 | SLBI |
| Viola riviniana | GB, VC17 Surrey, Coulsdon, Devilsden Wood | William Charles Richard Watson | William Charles Richard Watson | 30/4/1946 | SLBI |
| Viola riviniana var. diversa | GB, VC17 Surrey, Epsom | William Charles Richard Watson | William Charles Richard Watson | 16/4/1946 | SLBI |
| Viola riviniana | GB, VC17 Surrey, Epsom | | William Charles Richard Watson | 16/4/1946 | SLBI |
| Viola hirta | GB, VC16 West Kent, Polhill | | William Charles Richard Watson | 27/3/1946 | SLBI |
| Vicia villosa var. glabrescens | GB, VC16 West Kent, Southborough | William Charles Richard Watson | Allan Octavian Hume William Henry Griffin | 20/10/1908 | SLBI |
| Vicia sepium | GB, VC17 Surrey, Box Hill | William Charles Richard Watson | | 26/5/1928 | SLBI |
| Vaccinium myrtillus | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 7/1927 | SLBI |
| Trollius europaeus | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Thalictrum alpinum | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 7/1927 | SLBI |
| Sorbus minima | GB, VC42 Breconshire, Craig y Cilau | William Charles Richard Watson | | 15/11/1946 | SLBI |
| Sorbus anglica | GB, VC42 Breconshire, Craig y Cilau | William Charles Richard Watson | | 1946 | SLBI |
| Saxifraga stellaris | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Saxifraga hypnoides | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Saxifraga aizoides | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Salix atrocinerea x aurita | GB, VC17 Surrey, Wimbledon Common | | William Charles Richard Watson | 25/6/1946 | SLBI |
| Rubus winteri | GB, VC13 West Sussex, Midhurst | William Charles Richard Watson | William Charles Richard Watson | 22/7/1936 | SLBI |
| Rubus wedgwoodiae | GB, VC13 West Sussex, Midhurst | William Charles Richard Watson | | 24/7/1936 | SLBI |
| Rubus wedgwoodiae | GB, VC13 West Sussex, Midhurst | William Charles Richard Watson | William Charles Richard Watson | 24/7/1936 | SLBI |
| Rubus watsonii | GB, VC20 Hertfordshire, Mardley Heath | William Charles Richard Watson | William Charles Richard Watson | 23/7/1953 | SLBI |
| Rubus warrenii | GB, VC24 Buckinghamshire, Lee | William Charles Richard Watson | | 6/7/1936 | SLBI |
| Rubus warrenii | GB, VC24 Buckinghamshire, Lee | William Charles Richard Watson | William Charles Richard Watson | 6/7/1936 | SLBI |
| Rubus ulmifolius | GB, VC16 West Kent, Westerham | William Charles Richard Watson | William Charles Richard Watson | | SLBI |
| Rubus turritus | GB, VC39 Staffordshire, Hanchurch | William Charles Richard Watson | William Charles Richard Watson | 23/7/1950 | SLBI |
| Rubus trichodes | GB, VC17 Surrey, Wareham Hill | William Charles Richard Watson | | 23/8/1934 | SLBI |
| Rubus trichodes | GB, VC17 Surrey, Witley (near),Wareham Hill | William Charles Richard Watson | William Charles Richard Watson | 23/8/1934 | SLBI |
| Rubus tresidderi | GB, VC1 West Cornwall, Lambourne | Francis Rilstone | William Charles Richard Watson | 7/1949 | SLBI |
| Rubus trelleckensis | GB, VC35 Monmouthshire, Beacon Hill | William Charles Richard Watson | William Charles Richard Watson | 10/8/1933 | SLBI |
| Rubus trelleckensis | GB, VC35 Monmouthshire, Trelleck | William Charles Richard Watson | William Charles Richard Watson | 10/8/1933 | SLBI |
| Rubus tardus | GB, VC17 Surrey, Shirley | William Charles Richard Watson | William Charles Richard Watson | 7/7/1952 | SLBI |
| Rubus sulcatus | GB, VC30 Bedfordshire, Heath and Reach | William Charles Richard Watson | William Charles Richard Watson | 30/7/1946 | SLBI |
| Rubus sulcatus | GB, VC30 Bedfordshire, Heath and Reach | William Charles Richard Watson | William Charles Richard Watson | 30/7/1946 | SLBI |
| Rubus subopacus | GB, VC3 South Devon, Cholwicktown | William Charles Richard Watson | William Charles Richard Watson | 4/7/1951 | SLBI |
| Rubus subintegribasis | GB, VC9 Dorset, Verwood | | William Charles Richard Watson | 1/7/1951 | SLBI |
| Rubus subinermoides | GB, VC14 East Sussex, Saint Leonards | William Moyle Rogers | Charles Edward Britton William Charles Richard Watson | 19/8/1897 | SLBI |
| Rubus subinermoides | GB, VC14 East Sussex, Tunbridge Wells | William Charles Richard Watson | William Charles Richard Watson | 7/1940 | SLBI |
| Rubus subinermoides | GB, VC14 East Sussex, Tunbridge Wells | William Charles Richard Watson | | 14/8/1950 | SLBI |