| Carex montana | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | | 4/1873 | LAUS |
| Rosa micrantha var. pedunculo-nudo | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | | 6/7/1870 | SLBI |
| Rubus bloxamii | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | William Moyle Rogers | 18/8/1884 | ABS |
| Viola lactea | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | Augustin Ley | 25/5/1871 | BIRM |
| Rubus hastiformis | GB, VC3 South Devon, Bickleigh Vale | Thomas Richard Archer Briggs | | 18/8/1886 | BSBI |
| Rubus longithyrsiger | GB, VC3 South Devon, Bickleigh Vale | Thomas Richard Archer Briggs | | 9/8/1870 | SLBI |
| Anthyllis vulneraria | GB, VC3 South Devon, Bigbury Bay | Thomas Richard Archer Briggs | Frederick Townsend | 5/7/1875 | SLBI |
| 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 |
| 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 | Charles Bailey | 10/7/1876 | MANCH |
| 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 |
+ | Physospermum cornubiense | GB, VC3 South Devon, Blaxton | Thomas Richard Archer Briggs | Charles Bailey | 7/1868 | MANCH |
| Verbascum | GB, VC3 South Devon, Bovey Tracey | Thomas Richard Archer Briggs | | 22/6/1881 | K |
| Carex acutiformis | GB, VC3 South Devon, Brixton | Thomas Richard Archer Briggs | Alfred French | 5/1873 | BM |
| Viola lactea | GB, VC3 South Devon, Buckland | Thomas Richard Archer Briggs | Augustin Ley | 11/5/1876 | BIRM |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC3 South Devon, Caton | Thomas Richard Archer Briggs | Botanical Exchange Club Charles Bailey | 18/7/1879 | MANCH |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC3 South Devon, Caton | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles John Thomas Irvine Boswell-Syme Thomas Richard Archer Briggs | 7/1879 | BM |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC3 South Devon, Caton | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Arthur Bennett | 7/1879 | BM |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC3 South Devon, Caton | Thomas Richard Archer Briggs | | 18/7/1879 | BM |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC3 South Devon, Caton | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Henry & James Groves | 18/7/1879 | BM |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC3 South Devon, Caton | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Frederick Janson Hanbury | 7/1879 | BM |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC3 South Devon, Caton | Thomas Richard Archer Briggs | Botanical Exchange Club of The British Isles Edward Francis Linton Thomas Richard Archer Briggs | 10/7/1879 | BM |
| Rubus dentatifolius | GB, VC3 South Devon, Cholwichtown | Thomas Richard Archer Briggs | | 6/8/1881 | SLBI |
| Rubus opacus | GB, VC3 South Devon, Combe Point | Thomas Richard Archer Briggs | | 6/8/1867 | SLBI |
+ | Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Common Wood | Thomas Richard Archer Briggs | Charles Bailey | 4/9/1867 | MANCH |
| Polygonum aviculare | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | Augustin Ley | 10/9/1877 | BIRM |
+ | Puccinellia fasciculata | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | Charles Bailey | 26/6/1875 | MANCH |
| 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 |
| Rubus adscitus | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | | 25/7/1867 | SLBI |
| Rubus ramosus | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | | 1/8/1887 | BSBI |
| Rubus ulmifolius | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | | 4/8/1868 | SLBI |
| Salix cinerea x aurita = S. x multinervis | GB, VC3 South Devon, Crabtree | Thomas Richard Archer Briggs | Charles Bailey | 1869 | MANCH |
| Carex rostrata | GB, VC3 South Devon, Dartmoor | Thomas Richard Archer Briggs | Frederick Janson Hanbury John Thomas Irvine Boswell-Syme | 30/6/1868 | BM |
| Rubus silvaticus | GB, VC3 South Devon, Derriford | Thomas Richard Archer Briggs | William Moyle Rogers | 7/1890 | SHYB |
| Eryngium campestre | GB, VC3 South Devon, Devil's Point | Thomas Richard Archer Briggs | George Stephen West | 5/10/1876 | BIRM |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Diptford | Thomas Richard Archer Briggs | Charles Cardale Babington | 18/8/1881 | CGE |
| Convolvulus arvensis | GB, VC3 South Devon, Down Thomas | Thomas Richard Archer Briggs | Augustin Ley | 26/7/1875 | BIRM |
| Carex divulsa subsp. divulsa | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Thomas Richard Archer Briggs | 2/6/1868 | BM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Charles Cardale Babington | 7/9/1877 | CGE |