| Avena strigosa | GB, VC2 East Cornwall, Looe | Thomas Richard Archer Briggs | | 10/7/1871 | BON |
| Lotus angustissimus | GB, VC2 East Cornwall, Looe | Thomas Richard Archer Briggs | Augustin Ley | 10/7/1871 | BIRM |
| Crassula tillaea | GB, VC3 South Devon, Plym Valley | Thomas Richard Archer Briggs | John Ralfs | 23/4/1872 | SLBI |
| Crassula tillaea | GB, VC3 South Devon, Rumple Quarries | Thomas Richard Archer Briggs | London Botanical Exchange Club | 23/4/1872 | BIRM |
+ | Viola lactea | GB, VC3 South Devon, Roborough,Roborough Down | Thomas Richard Archer Briggs | | 5/1872 | MANCH |
| Carex muricata | GB, VC2 East Cornwall, Torpoint | Thomas Richard Archer Briggs | | 15/6/1872 | BM |
| Brassica rapa var. briggsii | GB, VC2 East Cornwall, Torpoint | Thomas Richard Archer Briggs | Augustin Ley | 15/6/1872 | BIRM |
| Odontites vernus | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | Augustin Ley | 19/6/1872 | BIRM |
| Rubus longithyrsiger | GB, VC2 East Cornwall, Landrake | Thomas Richard Archer Briggs | | 13/7/1872 | SHYB |
| Valerianella rimosa | GB, VC3 South Devon, Plymouth | Thomas Richard Archer Briggs | William Hadden Beeby | 19/7/1872 | SLBI |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC2 East Cornwall, Antony | Thomas Richard Archer Briggs | Augustin Ley | 17/8/1872 | BIRM |
| Mentha rubra | GB, VC3 South Devon, Egg Buckland | Thomas Richard Archer Briggs | Augustin Ley | 9/1872 | BIRM |
| Carex montana | GB, VC3 South Devon, Bickleigh | Thomas Richard Archer Briggs | | 4/1873 | LAUS |
| Carex acutiformis | GB, VC3 South Devon, Brixton | Thomas Richard Archer Briggs | Alfred French | 5/1873 | BM |
| 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 |
| Carex montana | GB, VC3 South Devon, Roborough Down | Thomas Richard Archer Briggs | Charles Bailey | 2/6/1873 | MANCH |
| Galium verum x mollugo = G. x pomeranicum | GB, VC3 South Devon, Mothecombe | Thomas Richard Archer Briggs | Charles Bailey | 16/7/1873 | MANCH |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC2 East Cornwall, Carkees | Thomas Richard Archer Briggs | Augustin Ley | 19/8/1873 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC2 East Cornwall, Carkeel | Thomas Richard Archer Briggs | Charles Cardale Babington | 19/9/1873 | CGE |
| Erophila verna | GB, VC2 East Cornwall, Torpoint | Thomas Richard Archer Briggs | William Hadden Beeby | 1/4/1874 | SLBI |
+ | Hypochaeris glabra | GB, VC3 South Devon, Torquay,Dawlish Warren | Thomas Richard Archer Briggs | Charles Bailey | 24/5/1874 | MANCH |
| Carex hirta | GB, VC3 South Devon, Elburton | Thomas Richard Archer Briggs | | 4/7/1874 | BM |
+ | Zostera noltei | GB, VC3 South Devon, Erme Mouth | Thomas Richard Archer Briggs | Elizabeth Anne Lomax | 10/7/1874 | MANCH |
| Clinopodium ascendens | GB, VC3 South Devon, Holbeton | Thomas Richard Archer Briggs | Augustin Ley | 3/8/1874 | BIRM |
| Rumex rupestris | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | Robert Large Baker | 10/8/1874 | BIRM |
| Mentha pulegium | GB, VC3 South Devon, Holbeton | Thomas Richard Archer Briggs | James Ramsay Drummond | 31/8/1874 | K |
| Senecio vulgaris | GB, VC2 East Cornwall, Tregantle | Thomas Richard Archer Briggs | Augustin Ley | 17/4/1875 | BIRM |
| 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 |
| 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 |
| Rosa stylosa var. systyla | GB, VC2 East Cornwall, Antony | Thomas Richard Archer Briggs | William Hadden Beeby | 24/6/1875 | SLBI |
| Orobanche minor var. maritima | GB, VC2 East Cornwall, Whitsand Bay | Thomas Richard Archer Briggs | Augustin Ley | 24/6/1875 | 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 |
| Orobanche minor var. maritima | GB, VC2 East Cornwall, Whitsand Bay | Thomas Richard Archer Briggs | John Ralfs | 7/1875 | SLBI |
| Anthyllis vulneraria | GB, VC3 South Devon, Bigbury Bay | Thomas Richard Archer Briggs | Frederick Townsend | 5/7/1875 | SLBI |
| Rosa obtusifolia subsp. tomentella | GB, VC2 East Cornwall, Sheviock | Thomas Richard Archer Briggs | | 12/7/1875 | SLBI |
| Atriplex patula | GB, VC3 South Devon, Honicknowle | Thomas Richard Archer Briggs | Augustin Ley | 17/7/1875 | BIRM |
| Galium verum x mollugo = G. x pomeranicum | GB, VC3 South Devon, Wembury | Thomas Richard Archer Briggs | Charles Bailey | 22/7/1875 | MANCH |