| Rubus crespignyanus | GB, VC16 West Kent, Hayes Common | William Charles Richard Watson | William Charles Richard Watson | 9/7/1937 | SLBI |
| Rubus criniger | GB, VC24 Buckinghamshire, Prestwood | Charles Edward Britton | Charles Edward Britton William Charles Richard Watson | 7/1900 | SLBI |
| Rubus criniger | GB, VC27 East Norfolk, Sprowston | William Charles Richard Watson | William Charles Richard Watson | 13/7/1946 | SLBI |
| Rubus crudelis | GB, VC13 West Sussex, Midhurst | William Charles Richard Watson | William Charles Richard Watson | 3/8/1932 | SLBI |
| Rubus daltrii | GB, VC17 Surrey, Royal Common | William Charles Richard Watson | William Charles Richard Watson | 2/7/1934 | SLBI |
| Rubus daltrii | GB, VC39 Staffordshire, Whitmore | William Charles Richard Watson | | 17/7/1950 | SLBI |
| Rubus daveyi | GB, VC1 West Cornwall, Truro,Chiverton | William Charles Richard Watson | William Charles Richard Watson | 11/7/1951 | SLBI |
| Rubus decussatus | GB, VC13 West Sussex, Blackdown | William Charles Richard Watson | William Charles Richard Watson | 4/8/1945 | SLBI |
| Rubus decussatus | GB, VC13 West Sussex, Blackdown | William Charles Richard Watson | William Charles Richard Watson | 4/8/1945 | SLBI |
| Rubus decussatus | GB, VC16 West Kent, Tunbridge Wells | William Charles Richard Watson | | 19/7/1940 | SLBI |
| Rubus dentatifolius | GB, VC3 South Devon, Roborough Downs | William Charles Richard Watson | | 19/7/1939 | SLBI |
| Rubus dentatifolius | IE, VCH1 South Kerry, Dingle | William Charles Richard Watson | | 25/8/1935 | SLBI |
| Rubus divaricatus | GB, VC17 Surrey, Royal Common | William Charles Richard Watson | William Charles Richard Watson | 2/7/1934 | SLBI |
| Rubus diversus | GB, VC16 West Kent, Abbey Wood | William Charles Richard Watson | | 5/9/1931 | SLBI |
| Rubus diversus | GB, VC16 West Kent, Erith, Lesnes Wood | William Charles Richard Watson | William Charles Richard Watson | 16/7/1939 | SLBI |
| Rubus dumetorum subsp. diversifolius | GB, VC39 Staffordshire, Newcastle under Lyme | William Charles Richard Watson | William Charles Richard Watson | 16/7/1950 | SLBI |
| Rubus durescens | GB, VC57 Derbyshire, Bradley Wood | Eric Smoothy Edees | William Charles Richard Watson | 29/7/1953 | SLBI |
| Rubus durescens | GB, VC57 Derbyshire, Bradley Wood | Eric Smoothy Edees | William Charles Richard Watson | 29/7/1953 | SLBI |
| Rubus durotrigum | GB, VC9 Dorset, Dullar Wood | William Charles Richard Watson | William Charles Richard Watson | 2/7/1951 | SLBI |
| Rubus durotrigum | GB, VC9 Dorset, Dullar Wood | | William Charles Richard Watson | 2/7/1951 | SLBI |
| Rubus edeesii | GB, VC54 North Lincolnshire, Apley | Augustin Ley | William Charles Richard Watson | 16/8/1907 | SLBI |
| Rubus errabundus | GB, VC17 Surrey, Tooting Bec | | William Charles Richard Watson | 7/7/1937 | SLBI |
| Rubus euanthinus | GB, VC11 South Hampshire, Matley Bog | William Charles Richard Watson | | 18/9/1929 | SLBI |
| Rubus euryanthemus | GB, VC16 West Kent, Bostall Heath | William Charles Richard Watson | | 16/7/1931 | SLBI |
| Rubus euryanthemus | GB, VC16 West Kent, Westerham | William Charles Richard Watson | | 4/7/1947 | SLBI |
| Rubus euryanthemus | GB, VC36 Herefordshire, Hereford | William Charles Richard Watson | | 12/7/1953 | SLBI |
| Rubus fissus | GB, VC16 West Kent, Hayes Common | William Charles Richard Watson | William Charles Richard Watson | 9/7/1937 | SLBI |
| Rubus flexuosus | GB, VC18 South Essex, Danbury | William Charles Richard Watson | William Charles Richard Watson | | SLBI |
| Rubus formidabilis | GB, VC17 Surrey, Putney Heath | William Charles Richard Watson | | 26/7/1950 | SLBI |
| Rubus fuscoviridis | GB, VC2 East Cornwall, Polperro | William Charles Richard Watson | William Charles Richard Watson | 7/7/1951 | SLBI |
| Rubus fuscus | GB, VC18 South Essex, Epping Forest | William Charles Richard Watson | William Charles Richard Watson | 3/7/1937 | SLBI |
| Rubus fuscus | GB, VC18 South Essex, Epping Forest | William Charles Richard Watson | | 3/7/1937 | SLBI |
| Rubus glanduliger | GB, VC13 West Sussex, Lavington | William Charles Richard Watson | William Charles Richard Watson | 25/7/1936 | SLBI |
| Rubus glanduliger | GB, VC17 Surrey, Pirbright | William Charles Richard Watson | William Charles Richard Watson | 23/8/1947 | SLBI |
| Rubus glareosus | GB, VC15 East Kent, Pollhill | William Charles Richard Watson | | 9/1948 | SLBI |
| Rubus glareosus | GB, VC15 East Kent, Pollhill | William Charles Richard Watson | | 9/1948 | SLBI |
| Rubus grabowskii | GB, VC39 Staffordshire, Meerbrook | William Charles Richard Watson | | 15/7/1950 | SLBI |
| Rubus gratus | GB, VC17 Surrey, Tooting | William Charles Richard Watson | William Charles Richard Watson | 4/7/1933 | SLBI |
| Rubus halsteadensis | GB, VC16 West Kent, Hayes | William Charles Richard Watson | | 19/8/1950 | SLBI |
| Rubus hartmanii | GB, VC16 West Kent, Tunbridge Wells | William Charles Richard Watson | | 18/8/1951 | SLBI |