| Sorbus devoniensis | GB, VC3 South Devon, Roborough | Thomas Richard Archer Briggs | Augustin Ley | 25/9/1870 | BIRM |
| Sorbus devoniensis | GB, VC3 South Devon, Roborough | Thomas Richard Archer Briggs | Allan Octavian Hume Frederick Townsend | 25/5/1871 | SLBI |
| Sorbus latifolia | GB, VC3 South Devon, Roborough | Thomas Richard Archer Briggs | Augustin Ley | 20/8/1870 | BIRM |
| Carex montana | GB, VC3 South Devon, Roborough Down | Thomas Richard Archer Briggs | Charles Bailey | 2/6/1873 | MANCH |
+ | Viola lactea | GB, VC3 South Devon, Roborough,Roborough Down | Thomas Richard Archer Briggs | | 5/1872 | MANCH |
| Crassula tillaea | GB, VC3 South Devon, Rumple Quarries | Thomas Richard Archer Briggs | London Botanical Exchange Club | 23/4/1872 | BIRM |
| Rubus hastiformis | GB, VC3 South Devon, Rumple Quarries | Thomas Richard Archer Briggs | William Hunt Painter William Moyle Rogers | 6/8/1867 | ABS |
| Rubus debilis | GB, VC3 South Devon, Saint Budeaux | Thomas Richard Archer Briggs | | 11/8/1887 | BSBI |
| Crepis biennis | GB, VC3 South Devon, Shaugh Bridge | Thomas Richard Archer Briggs | Augustin Ley Thomas Richard Archer Briggs | 9/6/1868 | BIRM |
| Rubus ramosus | GB, VC3 South Devon, South Brent | Thomas Richard Archer Briggs | William Moyle Rogers | 18/9/1889 | SHYB |
| Scirpus caespitosus | GB, VC3 South Devon, Staddon Heights | Thomas Richard Archer Briggs | | 29/6/1876 | BIRM |
| Carex ovalis | GB, VC3 South Devon, Tamerton Foliot | Thomas Richard Archer Briggs | | 14/6/1871 | BM |
| Rubus sagittarius | GB, VC3 South Devon, Tamerton Foliot | Thomas Richard Archer Briggs | | 27/8/1870 | SLBI |
| Avena strigosa | GB, VC3 South Devon, Tamerton Foliott | Thomas Richard Archer Briggs | Augustin Ley | 6/7/1871 | BIRM |
| Rubus imbricatus | GB, VC3 South Devon, Tavistock | Thomas Richard Archer Briggs | Thomas Richard Archer Briggs | 26/8/1890 | SHYB |
| Rubus micans | GB, VC3 South Devon, Teigngrace | Thomas Richard Archer Briggs | William Moyle Rogers | 4/9/1879 | SHYB |
+ | Hypochaeris glabra | GB, VC3 South Devon, Torquay,Dawlish Warren | Thomas Richard Archer Briggs | Charles Bailey | 24/5/1874 | MANCH |
| Rubus opacus | GB, VC3 South Devon, Tory Brook | Thomas Richard Archer Briggs | Andrew Bloxam | 9/7/1867 | SLBI |
| Galium verum x mollugo = G. x pomeranicum | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | Charles Bailey | 22/7/1875 | MANCH |
| Galium verum x mollugo = G. x pomeranicum | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | Augustin Ley | 22/7/1875 | BIRM |
| Galium verum x mollugo = G. x pomeranicum | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | Augustin Ley | 5/8/1875 | BIRM |
| Polygonum aviculare | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | Frederick Townsend | 2/9/1867 | SLBI |
| Rumex rupestris | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | Robert Large Baker | 10/8/1874 | BIRM |
| Rumex rupestris | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | | 26/7/1875 | SLBI |
| Rumex rupestris | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | Augustin Ley | 26/7/1875 | BIRM |
| Schoenoplectus triqueter | GB, VC2,VC3, River Tamar | Thomas Richard Archer Briggs | John Ralfs | 1876 | SLBI |
+ | Cicendia filiformis | GB, VC4 North Devon | Thomas Richard Archer Briggs | Charles Bailey William Moyle Rogers | 9/1883 | MANCH |
+ | Teucrium scordium | GB, VC4 North Devon, Braunton Burrows | Thomas Richard Archer Briggs | Charles Bailey Alexander Irvine | 1862 | MANCH |
| Rubus imbricatus | GB, VC4 North Devon, Okehampton | Thomas Richard Archer Briggs | | 15/9/1883 | SHYB |
| Rubus ulmifolius | GB, VC4 North Devon, Roborough | Thomas Richard Archer Briggs | | 17/8/1865 | SLBI |
| Rubus boraeanus | GB, VC4 North Devon, West Buckland | Thomas Richard Archer Briggs | | 19/8/1889 | SLBI |
| Rubus longithyrsiger | GB, Devon | Thomas Richard Archer Briggs | | | SLBI |
| Rubus sagittarius | GB, Devon | Thomas Richard Archer Briggs | | | SLBI |
| Viola lactea | GB, Devon, Colebrooke | Thomas Richard Archer Briggs | James Ramsay Drummond | 9/6/1876 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, Essex GB, VC6 North Somerset, Clifton Cultivated | James Walter White | Albert Bruce Jackson Charles Edgar Salmon David Fry Thomas Richard Archer Briggs | 14/8/1908 | K |
+ | Eryngium campestre | GB, VC6 North Somerset, Congresbury | Thomas Richard Archer Briggs | | 1866 | MANCH |
+ | Schoenoplectus triqueter | GB, VC6 North Somerset, Congresbury | Thomas Richard Archer Briggs | Charles Bailey | 13/9/1875 | MANCH |
| Rosa stylosa | GB, VC9 Dorset, Bere Wood | Thomas Richard Archer Briggs William Moyle Rogers | Botanical Exchange Club of The British Isles William Hunt Painter William Moyle Rogers | 19/7/1887 | ABS |
| Deschampsia setacea | GB, VC9 Dorset, Canford Heath | Thomas Richard Archer Briggs William Moyle Rogers | Botanical Exchange Club of The British Isles Augustin Ley William Moyle Rogers | 7/1888 | BIRM |
| Rubus foliosus | GB, VC9 Dorset, Wareham | John Clavell Mansel-Pleydell Thomas Richard Archer Briggs William Moyle Rogers | | 19/7/1887 | SHYB |