| Bromus hordeaceus subsp. thominei | GB, VC3 South Devon, Bigbury Bay | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles William Hunt Painter | 25/5/1885 | ABS |
| Callitriche obtusangula | GB, VC3 South Devon, Plympton | Thomas Richard Archer Briggs | | 9/1877 | ABS |
| Elymus pungens | GB, VC2 East Cornwall, Cremyll | Thomas Richard Archer Briggs | | 13/8/1877 | ABS |
| Lobelia urens | GB, VC2 East Cornwall, Lostwithiel and St.Veep, between | Thomas Richard Archer Briggs | William Hunt Painter | 10/10/1883 | ABS |
| Pyrus cordata | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles William Hunt Painter | 18/5/1881 | ABS |
| 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 |
| Rubus | | Thomas Richard Archer Briggs | William Hunt Painter | 8/7/1868 | ABS |
| Rubus bloxamii | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | William Moyle Rogers | 18/8/1884 | ABS |
| Rubus hastiformis | GB, VC3 South Devon, Rumple Quarries | Thomas Richard Archer Briggs | William Hunt Painter William Moyle Rogers | 6/8/1867 | ABS |
| Rubus macrophyllus var. schlechtendalii | GB, VC3 South Devon, Harford GB, VC3 South Devon, Ivybridge | Thomas Richard Archer Briggs | William Hunt Painter William Moyle Rogers | 8/1890 | ABS |
| Rubus pruinosus | GB, VC11 South Hampshire, Sway | Thomas Richard Archer Briggs William Moyle Rogers | William Hunt Painter | 7/8/1889 | ABS |
| Rubus rotundifolius | GB, VC3 South Devon, North Huish | Thomas Richard Archer Briggs | | 9/1888 | ABS |
| Alopecurus bulbosus | GB, VC2 East Cornwall, Calstock | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Robert Large Baker | 31/5/1875 | BIRM |
| Ambrosia artemisiifolia | GB, VC2 East Cornwall, Calstock | Thomas Richard Archer Briggs | Augustin Ley | 12/9/1876 | 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 |
| Atriplex laciniata | GB, VC1 West Cornwall, Marazion Green | Thomas Richard Archer Briggs | Augustin Ley Elizabeth Anne Lomax | 8/1875 | BIRM |
| Atriplex patula | GB, VC3 South Devon, Honicknowle | Thomas Richard Archer Briggs | Augustin Ley | 17/7/1875 | BIRM |
| Avena strigosa | GB, VC3 South Devon, Tamerton Foliott | Thomas Richard Archer Briggs | Augustin Ley | 6/7/1871 | BIRM |
| Barbarea intermedia | GB, VC3 South Devon, Knackers Knowle | Thomas Richard Archer Briggs | Augustin Ley | 15/5/1878 | BIRM |
| Brassica rapa var. briggsii | GB, VC2 East Cornwall, Torpoint | Thomas Richard Archer Briggs | Augustin Ley | 15/6/1872 | BIRM |
| Bromus hordeaceus subsp. thominei | GB, VC2 East Cornwall, Rame Head | Thomas Richard Archer Briggs | Augustin Ley | 14/6/1877 | BIRM |
| Callitriche hamulata | GB, VC2 East Cornwall, Trematon | Thomas Richard Archer Briggs | Augustin Ley | | BIRM |
| Callitriche hamulata | GB, VC3 South Devon, River Plym | Thomas Richard Archer Briggs | Augustin Ley | 15/6/1880 | BIRM |
| Carduus crispus x nutans = C. x stangii | GB, VC3 South Devon, Elburton | Thomas Richard Archer Briggs | Augustin Ley | 8/7/1871 | BIRM |
| Carduus crispus x nutans = C. x stangii | GB, VC3 South Devon, Leighham | Thomas Richard Archer Briggs | Harold Stuart Thompson | 27/6/1890 | 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 |
| Carex punctata | GB, VC3 South Devon, Bigbury Bay | Thomas Richard Archer Briggs | London Botanical Exchange Club Robert Large Baker | 7/1876 | BIRM |
| Clinopodium ascendens | GB, VC3 South Devon, Holbeton | Thomas Richard Archer Briggs | Augustin Ley | 3/8/1874 | BIRM |
| Convolvulus arvensis | GB, VC3 South Devon, Down Thomas | Thomas Richard Archer Briggs | Augustin Ley | 26/7/1875 | BIRM |
| Crassula tillaea | GB, VC3 South Devon, Rumple Quarries | Thomas Richard Archer Briggs | London Botanical Exchange Club | 23/4/1872 | BIRM |
| Crepis biennis | GB, VC3 South Devon, Shaugh Bridge | Thomas Richard Archer Briggs | Augustin Ley Thomas Richard Archer Briggs | 9/6/1868 | BIRM |
| Danaa cornubiensis | GB, VC3 South Devon, Blaxton | Thomas Richard Archer Briggs | Augustin Ley | 7/1868 | BIRM |
| 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 |
| Drosera intermedia | GB, VC2 East Cornwall, Viverdon Down | Thomas Richard Archer Briggs | London Botanical Exchange Club Robert Large Baker | 8/8/1865 | BIRM |
| Drosera rotundifolia | GB, VC71 Isle of Man, Snaefell | Thomas Richard Archer Briggs | Robert Large Baker | 8/1877 | BIRM |
| Eleocharis parvula | GB, VC3 South Devon, Aveton Gifford | Thomas Richard Archer Briggs | William Hillhouse | 8/1880 | BIRM |
+ | Epilobium hirsutum x montanum = E. x erroneum | GB, VC3 South Devon, Eggbuckland | Thomas Richard Archer Briggs | | 2/8/1881 | BIRM |
| Epilobium lanceolatum | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | | 14/4/1877 | BIRM |
| Eryngium campestre | GB, VC3 South Devon, Devil's Point | Thomas Richard Archer Briggs | George Stephen West | 5/10/1876 | BIRM |