+ | Zostera noltei | GB, VC3 South Devon, Erme Mouth | Thomas Richard Archer Briggs | Elizabeth Anne Lomax | 10/7/1874 | MANCH |
| Zostera nana | GB, VC2 East Cornwall, Saint John's | Thomas Richard Archer Briggs | Augustin Ley | 1877 | BIRM |
| Zostera nana | GB, VC3 South Devon, Erme Mouth | Thomas Richard Archer Briggs | | 10/7/1876 | BIRM |
| Viola odorata x hirta = V. x scabra | GB, VC3 South Devon, Elburton | Thomas Richard Archer Briggs | Charles Bailey | 14/3/1876 | MANCH |
| Viola odorata x hirta = V. x scabra | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Charles Bailey | 16/6/1876 | MANCH |
| Viola odorata x hirta = V. x scabra | GB, VC3 South Devon, Plympton | Thomas Richard Archer Briggs | William Hadden Beeby | 26/4/1875 | SLBI |
| Viola odorata x hirta = V. x scabra | GB, VC3 South Devon, Plympton | Thomas Richard Archer Briggs | Augustin Ley | 26/4/1875 | BIRM |
+ | Viola lactea | GB, VC3 South Devon | Thomas Richard Archer Briggs | Botanical Exchange Club Charles Bailey | 30/5/1877 | MANCH |
+ | Viola lactea | GB, VC3 South Devon | Thomas Richard Archer Briggs | Charles Bailey | 12/5/1864 | MANCH |
+ | Viola lactea | GB, VC3 South Devon | Thomas Richard Archer Briggs | Charles Bailey | 25/5/1867 | MANCH |
+ | Viola lactea | GB, VC3 South Devon | Thomas Richard Archer Briggs | Charles Bailey | 15/5/1876 | MANCH |
| Viola lactea | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | Augustin Ley | 25/5/1871 | BIRM |
| Viola lactea | GB, VC3 South Devon, Buckland | Thomas Richard Archer Briggs | Augustin Ley | 11/5/1876 | BIRM |
| Viola lactea | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | William Hadden Beeby | 26/5/1876 | SLBI |
+ | Viola lactea | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Botanical Exchange Club Charles Bailey | 16/6/1879 | MANCH |
+ | Viola lactea | GB, VC3 South Devon, Roborough,Roborough Down | Thomas Richard Archer Briggs | | 5/1872 | MANCH |
| Viola lactea | GB, Devon, Colebrooke | Thomas Richard Archer Briggs | James Ramsay Drummond | 9/6/1876 | K |
| Viola hirta | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | George Nicholson William Hadden Beeby William Williamson Newbould | 14/4/1882 | SLBI |
| Verbascum thapsus x nigrum = V. x semialbum | GB, VC2 East Cornwall, Seaton | Thomas Richard Archer Briggs | Augustin Ley | 12/6/1876 24/7/1876 | BIRM |
| Verbascum lychnitis var. album | GB, VC39 Staffordshire, Whittington Common | | John (Joannis) Fraser Thomas Richard Archer Briggs | 8/1877 | K |
| Verbascum | GB, VC3 South Devon, Bovey Tracey | Thomas Richard Archer Briggs | | 22/6/1881 | K |
| Valerianella rimosa | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | William Hadden Beeby | 19/7/1872 | SLBI |
| Thymus chamaedrys | GB, VC36 Herefordshire, Sellack | Augustin Ley | Augustin Ley Thomas Richard Archer Briggs | 19/9/1877 | K |
+ | Teucrium scordium | GB, VC4 North Devon, Braunton Burrows | Thomas Richard Archer Briggs | Charles Bailey Alexander Irvine | 1862 | MANCH |
| Taraxacum sect. Palustria | GB, VC2 East Cornwall, Saint John's | Thomas Richard Archer Briggs | Augustin Ley | 5/5/1873 | BIRM |
| Taraxacum sect. Palustria | GB, VC3 South Devon, Plympton | Thomas Richard Archer Briggs | Augustin Ley | 24/5/1873 | BIRM |
| Stellaria holostea | GB, VC3 South Devon | Thomas Richard Archer Briggs | Augustin Ley | 30/5/1877 | BIRM |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC3 South Devon, Bere Alston | Thomas Richard Archer Briggs | | 26/8/1890 | K |
| Spergularia rubra | GB, VC2 East Cornwall, Saint German's | Thomas Richard Archer Briggs | Augustin Ley | 2/8/1875 | BIRM |
| Sorbus latifolia | GB, VC3 South Devon, Roborough | Thomas Richard Archer Briggs | Augustin Ley | 20/8/1870 | BIRM |
| Sorbus devoniensis | GB, VC3 South Devon, Egg Buckland Cultivated | Thomas Richard Archer Briggs | William Hadden Beeby | 10/1884 | SLBI |
| Sorbus devoniensis | GB, VC3 South Devon, Meavy | Thomas Richard Archer Briggs | William Hadden Beeby | 5/1871 | SLBI |
| Sorbus devoniensis | GB, VC3 South Devon, Roborough | Thomas Richard Archer Briggs | | 25/5/1871 | SLBI |
| Sorbus devoniensis | GB, VC3 South Devon, Roborough | Thomas Richard Archer Briggs | Augustin Ley | 20/8/1870 | BIRM |
| 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 |
| Senecio vulgaris | GB, VC2 East Cornwall, Tregantle | Thomas Richard Archer Briggs | Augustin Ley | 17/4/1875 | BIRM |
| Scrophularia nodosa | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | | 27/6/1890 | K |
| Scirpus caespitosus | GB, VC3 South Devon, Staddon Heights | Thomas Richard Archer Briggs | | 29/6/1876 | BIRM |
+ | Schoenoplectus triqueter | GB, Cornwall, Cornwall | Thomas Richard Archer Briggs | Charles Bailey | 7/9/1875 | MANCH |