| Eleocharis quinqueflora | GB, VC42 Breconshire, Penderyn | | William Charles Richard Watson | 16/6/1946 | SLBI |
| Euphrasia curta | GB, VC17 Surrey, Selsdon Wood | | William Charles Richard Watson | 2/10/1946 | SLBI |
| Foeniculum vulgare | GB, VC37 Worcestershire, Upton on Severn | William Charles Richard Watson | | 13/6/1946 | SLBI |
| Frangula alnus | GB, VC16 West Kent, Hayes Common | William Charles Richard Watson | Allan Octavian Hume | 22/7/1911 | SLBI |
| Gentianella campestris | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 7/1927 | SLBI |
| Hieracium | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Hieracium cillense | GB, VC42 Breconshire, Craig y Cilau | William Charles Richard Watson | | 15/6/1946 | SLBI |
| Hieracium sect. Hieracium | GB, VC35 Monmouthshire, Tintern,Wyndcliff | William Charles Richard Watson | William Charles Richard Watson | 19/6/1946 | SLBI |
| Juncus trifidus | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Lepidium campestre | GB, VC17 Surrey, Beverley Flat | William Charles Richard Watson | | 25/6/1946 | SLBI |
| Luzula multiflora subsp. congesta | GB, VC17 Surrey, Putney Heath | William Charles Richard Watson | | 25/6/1946 | SLBI |
| Melampyrum sylvaticum | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Melampyrum sylvaticum | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Minuartia rubella | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | William Charles Richard Watson | 8/7/1927 | SLBI |
| Pedicularis palustris | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 7/1927 | SLBI |
| Persicaria vivipara | GB, VC88 Mid Perthshire, Ben Lawers | William Charles Richard Watson | | 8/7/1927 | SLBI |
| Populus nigra | GB, VC16 West Kent, High Elms | William Charles Richard Watson | William Charles Richard Watson | 29/6/1946 | SLBI |
| Rorippa nasturtium-aquaticum | GB, VC42 Breconshire, Penderyn | William Charles Richard Watson | William Charles Richard Watson | 16/6/1946 | SLBI |
| Rosa agrestis | GB, VC17 Surrey, Wimbledon Common | William Charles Richard Watson | | 25/6/1946 | SLBI |
| Rosa caesia subsp. caesia | GB, VC17 Surrey, Wimbledon Common | William Charles Richard Watson | | 25/6/1946 | SLBI |
| Rosa canina | GB, VC17 Surrey, Wimbledon | William Charles Richard Watson | | 25/6/1946 | SLBI |
| Rosa canina x sherardii = R. x rothschildii | GB, VC17 Surrey, Wimbledon | William Charles Richard Watson | | 25/6/1946 | SLBI |
| Rosa obtusifolia subsp. tomentella | GB, VC17 Surrey, Rose Copse | William Charles Richard Watson | | 26/6/1946 | SLBI |
| Rubus acclivitatum | GB, VC3 South Devon, Cornwood | William Charles Richard Watson | William Charles Richard Watson | 21/7/1939 | SLBI |
| Rubus acutifrons | GB, VC34 West Gloucestershire, Mitcheldean Meend | William Charles Richard Watson | William Charles Richard Watson | 19/7/1932 | SLBI |
| Rubus acutifrons | GB, VC15 East Kent, Harbledown | | William Charles Richard Watson | 10/7/1934 | SLBI |
| Rubus acutifrons | GB, VC15 East Kent, Harbledown | | William Charles Richard Watson | | SLBI |
| Rubus adamsii | GB, VC24 Buckinghamshire, Beamond End | William Charles Richard Watson | | 31/7/1950 | SLBI |
| Rubus adenanthoides | GB, VC39 Staffordshire, Kinver | Eric Smoothy Edees | William Charles Richard Watson | 19/7/1952 | SLBI |
| Rubus adenanthoides | GB, VC39 Staffordshire, Kinvere | William Charles Richard Watson | | 19/7/1952 | SLBI |
| Rubus adenoleucus | GB, VC21 Middlesex, Scratchwood | William Charles Richard Watson | William Charles Richard Watson | 19/6/1950 | SLBI |
| Rubus affinis | GB, VC16 West Kent, Bickley Cultivated | | William Charles Richard Watson | 3/8/1950 | SLBI |
| Rubus ahenifolius | GB, VC17 Surrey, Woking | William Charles Richard Watson | | 6/8/1938 | SLBI |
| Rubus ahenifolius | GB, VC17 Surrey, Woking | William Charles Richard Watson | William Charles Richard Watson | 6/8/1938 | SLBI |
| Rubus albionis | GB, VC13 West Sussex, Petworth, Bognor Common | William Charles Richard Watson | William Charles Richard Watson | 19/7/1936 | SLBI |
| Rubus altiarcuatus | GB, VC4 North Devon, Lynton,Watersmeet | William Charles Richard Watson | William Charles Richard Watson | 2/7/1951 | SLBI |
| Rubus altiarcuatus | GB, VC4 North Devon, Watersmeet | William Charles Richard Watson | William Charles Richard Watson | 2/7/1951 | SLBI |
| Rubus amplificatus | GB, VC36 Herefordshire, Aconbury | John Ezra Woodhead | William Charles Richard Watson | 11/7/1954 | SLBI |
| Rubus amplificatus | GB, VC39 Staffordshire, Swindon | Eric Smoothy Edees | William Charles Richard Watson | 19/7/1952 | SLBI |
| Rubus amplificatus | GB, VC30 Bedfordshire, Dagnall | William Charles Richard Watson | William Charles Richard Watson | 29/7/1946 | SLBI |