| 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 |
| Rubus imbricatus | GB, VC3 South Devon, Tavistock | Thomas Richard Archer Briggs | Thomas Richard Archer Briggs | 26/8/1890 | SHYB |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC3 South Devon, Bere Alston | Thomas Richard Archer Briggs | | 26/8/1890 | K |
| 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 plicatus | GB, VC11 South Hampshire, Hinton Admiral | Thomas Richard Archer Briggs William Moyle Rogers | Allan Octavian Hume Thomas Richard Archer Briggs | 10/7/1890 | SLBI |
| Rubus plicatus | GB, VC11 South Hampshire, Hinton Admiral | Thomas Richard Archer Briggs William Moyle Rogers | Allan Octavian Hume | 10/7/1890 | SLBI |
| Rubus silvaticus | GB, VC3 South Devon, Derriford | Thomas Richard Archer Briggs | William Moyle Rogers | 7/1890 | SHYB |
| Carduus crispus x nutans = C. x stangii | GB, VC3 South Devon, Leighham | Thomas Richard Archer Briggs | Harold Stuart Thompson | 27/6/1890 | BIRM |
| Scrophularia nodosa | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | | 27/6/1890 | K |
| Rubus ramosus | GB, VC3 South Devon, South Brent | Thomas Richard Archer Briggs | William Moyle Rogers | 18/9/1889 | SHYB |
| Rubus boraeanus | GB, VC4 North Devon, West Buckland | Thomas Richard Archer Briggs | | 19/8/1889 | SLBI |
| Rubus pruinosus | GB, VC11 South Hampshire, Sway | Thomas Richard Archer Briggs William Moyle Rogers | Richard de Gylpyn Benson | 7/8/1889 | SHYB |
| Rubus pruinosus | GB, VC11 South Hampshire, Sway | Thomas Richard Archer Briggs William Moyle Rogers | William Hunt Painter | 7/8/1889 | ABS |
| Callitriche obtusangula | GB, VC3 South Devon, Plympton Saint Mary | Thomas Richard Archer Briggs | | 19/9/1888 | K |
| Rubus hirtus subsp. rotundifolius | GB, VC3 South Devon, North Huish | Thomas Richard Archer Briggs | William Moyle Rogers | 7/9/1888 | SHYB |
| Rubus rotundifolius | GB, VC3 South Devon, North Huish | Thomas Richard Archer Briggs | | 9/1888 | ABS |
| Rubus saxatilis | GB, VC3 South Devon, Fancy | Thomas Richard Archer Briggs | | 9/7/1888 | LAUS |
| 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 |
| Geranium robertianum | | | William Hadden Beeby Thomas Richard Archer Briggs | 29/5/1888 | SLBI |
| Mespilus germanica | GB, VC39 Staffordshire, Salt | Thomas Richard Archer Briggs | Augustin Ley | 14/5/1888 | BIRM |
| Rubus mutabilis | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | | 23/8/1887 | BSBI |
| Rubus debilis | GB, VC3 South Devon, Saint Budeaux | Thomas Richard Archer Briggs | | 11/8/1887 | BSBI |
| Rubus ramosus | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | | 8/8/1887 | BSBI |
| Rubus ramosus | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | | 1/8/1887 | BSBI |
| 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 foliosus | GB, VC9 Dorset, Wareham | John Clavell Mansel-Pleydell Thomas Richard Archer Briggs William Moyle Rogers | | 19/7/1887 | SHYB |
| Rubus pyramidalis | GB, VC11 South Hampshire, Brockenhurst | Thomas Richard Archer Briggs | Allan Octavian Hume William Moyle Rogers | 22/9/1886 | SLBI |
| Rubus hastiformis | GB, VC3 South Devon, Bickleigh Vale | Thomas Richard Archer Briggs | | 18/8/1886 | BSBI |
| 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 |
| Sorbus devoniensis | GB, VC3 South Devon, Egg Buckland Cultivated | Thomas Richard Archer Briggs | William Hadden Beeby | 10/1884 | SLBI |
| Rubus bloxamii | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | William Moyle Rogers | 18/8/1884 | ABS |
+ | Lobelia urens | GB, VC2 East Cornwall, Bodmin (Se of),Lostwithiel | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Charles Bailey | 10/10/1883 | MANCH |
| Lobelia urens | GB, VC2 East Cornwall, Lostwithiel and St.Veep, between | Thomas Richard Archer Briggs | William Hunt Painter | 10/10/1883 | ABS |
| Lobelia urens | GB, VC2 East Cornwall, Saint Lostwithiel | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles William Hadden Beeby | 10/10/1883 | SLBI |
| Rubus imbricatus | GB, VC4 North Devon, Okehampton | Thomas Richard Archer Briggs | | 15/9/1883 | SHYB |
+ | Cicendia filiformis | GB, VC4 North Devon | Thomas Richard Archer Briggs | Charles Bailey William Moyle Rogers | 9/1883 | MANCH |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC3 South Devon, Ermington | Thomas Richard Archer Briggs | Thomas Richard Archer Briggs | 25/5/1883 | BM |
| Carduus pycnocephalus | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Augustin Ley | 22/6/1882 | BIRM |
| Carduus pycnocephalus | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles | 2/6/1882 | SLBI |
| Viola hirta | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | George Nicholson William Hadden Beeby William Williamson Newbould | 14/4/1882 | SLBI |