| Rubus hartmanii | GB, VC16 West Kent, Tunbridge Wells | William Charles Richard Watson | William Charles Richard Watson | 18/8/1951 | SLBI |
| Rubus sprengelii | GB, VC17 Surrey, Limpsfield | William Charles Richard Watson | William Charles Richard Watson | 17/7/1951 | SLBI |
| Rubus sprengelii | GB, VC17 Surrey, Limpsfield | William Charles Richard Watson | William Charles Richard Watson | 17/7/1951 | SLBI |
| Rubus leyanus | GB, VC8 South Wiltshire, Warminster | William Charles Richard Watson | | 14/7/1951 | SLBI |
| Rubus leyanus | GB, VC8 South Wiltshire, Warminster | William Charles Richard Watson | William Charles Richard Watson | 14/7/1951 | SLBI |
| Rubus raduloides | GB, VC11 South Hampshire, Eastleigh | William Charles Richard Watson | | 14/7/1951 | SLBI |
| Rubus carnkiefensis | GB, VC1 West Cornwall, Carnkief | William Charles Richard Watson | William Charles Richard Watson | 11/7/1951 | SLBI |
| Rubus septentrionalis | GB, VC1 West Cornwall, Carnkief | William Charles Richard Watson | William Charles Richard Watson | 11/7/1951 | SLBI |
| Rubus riddelsdellii | GB, VC1 West Cornwall, Newlyn Downs | William Charles Richard Watson | William Charles Richard Watson | 11/7/1951 | SLBI |
| Rubus daveyi | GB, VC1 West Cornwall, Truro,Chiverton | William Charles Richard Watson | William Charles Richard Watson | 11/7/1951 | SLBI |
| Rubus fuscoviridis | GB, VC2 East Cornwall, Polperro | William Charles Richard Watson | William Charles Richard Watson | 7/7/1951 | SLBI |
| Rubus sciocharis | GB, VC30 Bedfordshire, Clophill | William Charles Richard Watson | William Charles Richard Watson | 7/7/1951 | SLBI |
| Rubus coombensis | GB, VC3 South Devon, Bickleigh | William Charles Richard Watson | William Charles Richard Watson | 6/7/1951 | SLBI |
| Rubus subopacus | GB, VC3 South Devon, Cholwicktown | William Charles Richard Watson | William Charles Richard Watson | 4/7/1951 | SLBI |
| Rubus briggsianus | GB, VC3 South Devon, Cornwood | William Charles Richard Watson | William Charles Richard Watson | 4/7/1951 | 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 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 questieri | GB, VC9 Dorset, Foxholes Wood | William Charles Richard Watson | William Charles Richard Watson | 2/7/1951 | SLBI |
| Rubus pullifolius | GB, VC9 Dorset, Bournemouth | William Charles Richard Watson | William Charles Richard Watson | 1/7/1951 | SLBI |
| Rubus pullifolius | GB, VC9 Dorset, Talbot Heath | William Charles Richard Watson | William Charles Richard Watson | 1/7/1951 | SLBI |
| Rubus mollissimus | GB, VC9 Dorset, Verwood | William Charles Richard Watson | William Charles Richard Watson | 1/7/1951 | SLBI |
| Rubus subintegribasis | GB, VC9 Dorset, Verwood | | William Charles Richard Watson | 1/7/1951 | SLBI |
| Rubus cinerosus | GB, VC16 West Kent, Plumstead Cultivated | William Charles Richard Watson | | 7/1951 | SLBI |
| Rubus cinerosus | GB, VC16 West Kent, Plumstead Cultivated | Edward Charles Wallace | William Charles Richard Watson | 7/1951 | SLBI |
| Rubus patuliformis | GB, VC16 West Kent, Rusthall Common | William Charles Richard Watson | William Charles Richard Watson | 7/9/1950 | SLBI |
| Rubus halsteadensis | GB, VC16 West Kent, Hayes | William Charles Richard Watson | | 19/8/1950 | SLBI |
| Rubus subinermoides | GB, VC14 East Sussex, Tunbridge Wells | William Charles Richard Watson | | 14/8/1950 | SLBI |
| Rubus subinermoides | GB, VC16 West Kent, Tunbridge Wells | William Charles Richard Watson | William Charles Richard Watson | 14/8/1950 | SLBI |
| Rubus incurvatus | GB, VC17 Surrey, Netley Heath | William Charles Richard Watson | William Charles Richard Watson | 9/8/1950 | SLBI |
| Rubus affinis | GB, VC16 West Kent, Bickley Cultivated | | William Charles Richard Watson | 3/8/1950 | SLBI |
| Rubus affinis | GB, VC17 Surrey, Wimbledon Common Cultivated | William Charles Richard Watson | William Charles Richard Watson | 3/8/1950 | SLBI |
| Rubus adamsii | GB, VC24 Buckinghamshire, Beamond End | William Charles Richard Watson | | 31/7/1950 | SLBI |
| Rubus radula | GB, VC24 Buckinghamshire, Beamond End | William Charles Richard Watson | | 31/7/1950 | SLBI |
| Rubus formidabilis | GB, VC17 Surrey, Putney Heath | William Charles Richard Watson | | 26/7/1950 | SLBI |
| Rubus turritus | GB, VC39 Staffordshire, Hanchurch | William Charles Richard Watson | William Charles Richard Watson | 23/7/1950 | SLBI |
| Rubus daltrii | GB, VC39 Staffordshire, Whitmore | William Charles Richard Watson | | 17/7/1950 | SLBI |
| Rubus dumetorum subsp. diversifolius | GB, VC39 Staffordshire, Newcastle under Lyme | William Charles Richard Watson | William Charles Richard Watson | 16/7/1950 | SLBI |
| Rubus grabowskii | GB, VC39 Staffordshire, Meerbrook | William Charles Richard Watson | | 15/7/1950 | SLBI |