| Rumex | GB, Cornwall | Thomas Richard Archer Briggs | London Botanical Exchange Club Robert Large Baker | | BIRM |
| Stellaria holostea | GB, VC3 South Devon | Thomas Richard Archer Briggs | Augustin Ley | 30/5/1877 | BIRM |
| Eleocharis parvula | GB, VC3 South Devon, Aveton Gifford | Thomas Richard Archer Briggs | William Hillhouse | 8/1880 | BIRM |
| Mespilus germanica | GB, VC3 South Devon, Battisborough | Thomas Richard Archer Briggs | Augustin Ley Thomas Richard Archer Briggs | 26/5/1868 20/8/1868 | BIRM |
| Viola lactea | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | Augustin Ley | 25/5/1871 | BIRM |
| Carex punctata | GB, VC3 South Devon, Bigbury Bay | Thomas Richard Archer Briggs | London Botanical Exchange Club Robert Large Baker | 7/1876 | BIRM |
| Rumex rupestris | GB, VC3 South Devon, Bigbury Bay | Thomas Richard Archer Briggs | Augustin Ley | 10/7/1876 | BIRM |
| Danaa cornubiensis | GB, VC3 South Devon, Blaxton | Thomas Richard Archer Briggs | Augustin Ley | 7/1868 | BIRM |
| Viola lactea | GB, VC3 South Devon, Buckland | Thomas Richard Archer Briggs | Augustin Ley | 11/5/1876 | BIRM |
| Puccinellia fasciculata | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Robert Large Baker | 26/6/1875 | BIRM |
| Polygonum aviculare | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | Augustin Ley | 10/9/1877 | BIRM |
| Eryngium campestre | GB, VC3 South Devon, Devil's Point | Thomas Richard Archer Briggs | George Stephen West | 5/10/1876 | BIRM |
| Convolvulus arvensis | GB, VC3 South Devon, Down Thomas | Thomas Richard Archer Briggs | Augustin Ley | 26/7/1875 | BIRM |
| Mentha rubra | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Augustin Ley | 9/1872 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Augustin Ley | 7/9/1877 | BIRM |
+ | Epilobium hirsutum x montanum = E. x erroneum | GB, VC3 South Devon, Eggbuckland | Thomas Richard Archer Briggs | | 2/8/1881 | BIRM |
| Carduus crispus x nutans = C. x stangii | GB, VC3 South Devon, Elburton | Thomas Richard Archer Briggs | Augustin Ley | 8/7/1871 | BIRM |
| Zostera nana | GB, VC3 South Devon, Erme Mouth | Thomas Richard Archer Briggs | | 10/7/1876 | BIRM |
| Pyrus cordata | GB, VC3 South Devon, Estover | Thomas Richard Archer Briggs | | 9/5/1870 | BIRM |
| Pyrus cordata | GB, VC3 South Devon, Estover | Thomas Richard Archer Briggs | | 4/5/1871 | BIRM |
| Pyrus cordata | GB, VC3 South Devon, Estover | Thomas Richard Archer Briggs | | 21/8/1876 | BIRM |
| Pyrus cordata | GB, VC3 South Devon, Estover | Thomas Richard Archer Briggs | | 11/5/1877 | BIRM |
+ | Pyrus cordata | GB, VC3 South Devon, Estover | Thomas Richard Archer Briggs | | 13/9/1881 | BIRM |
| Clinopodium ascendens | GB, VC3 South Devon, Holbeton | Thomas Richard Archer Briggs | Augustin Ley | 3/8/1874 | BIRM |
| Atriplex patula | GB, VC3 South Devon, Honicknowle | Thomas Richard Archer Briggs | Augustin Ley | 17/7/1875 | BIRM |
| Polycarpon tetraphyllum | GB, VC3 South Devon, King's Tamerton, Plymouth | Thomas Richard Archer Briggs | George Stephen West | 5/1869 | BIRM |
| Barbarea intermedia | GB, VC3 South Devon, Knackers Knowle | Thomas Richard Archer Briggs | Augustin Ley | 15/5/1878 | BIRM |
| Carduus crispus x nutans = C. x stangii | GB, VC3 South Devon, Leighham | Thomas Richard Archer Briggs | Harold Stuart Thompson | 27/6/1890 | BIRM |
| Anthoxanthum aristatum subsp. puelii | GB, VC3 South Devon, Newton Ferrers | Thomas Richard Archer Briggs | London Botanical Exchange Club Robert Large Baker | 3/7/1876 | BIRM |
| Asplenium obovatum | GB, VC3 South Devon, Petertavy | Thomas Richard Archer Briggs | Augustin Ley | 4/8/1866 | BIRM |
| Hypericum | GB, VC3 South Devon, Plym Valley | Thomas Richard Archer Briggs | Augustin Ley | 18/7/1868 | BIRM |
| Hypericum undulatum | GB, VC3 South Devon, Plymbridge | Thomas Richard Archer Briggs | Augustin Ley | 6/8/1867 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Plymbridge | Thomas Richard Archer Briggs | Augustin Ley | 23/8/1877 | BIRM |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | | 15/9/1876 | BIRM |
| Epilobium lanceolatum | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | | 14/4/1877 | BIRM |
| Polygonum rurivagum | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Augustin Ley | 25/8/1868 | BIRM |
| Polygonum rurivagum | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Augustin Ley | 25/8/1868 | BIRM |
| Odontites vernus | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Augustin Ley | 19/6/1872 | BIRM |
| Rumex conglomeratus x pulcher = R. x muretii | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Augustin Ley | 4/8/1879 | BIRM |
| Carduus pycnocephalus | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Augustin Ley | 22/6/1882 | BIRM |