+ | Teucrium scordium | GB, VC4 North Devon, Braunton Burrows | John Ralfs | Charles Bailey John Norton Mills William Lowndes Notcutt George Henry Kendrick Thwaites | 9/1838 | MANCH |
+ | Helianthemum apenninum | GB, VC6 North Somerset, Brean Down | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | 1843 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Bristol | George Henry Kendrick Thwaites | George Henry Kendrick Thwaites | 4/1842 | MANCH |
| Paris quadrifolia | GB, VC6 North Somerset, Bristol | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | 1843 | MANCH |
| Ornithogalum pyrenaicum | GB, VC6 North Somerset, Bristol,Stockwood | George Henry Kendrick Thwaites | John Ralfs | 1841 | SLBI |
+ | Dianthus gratianopolitanus | GB, VC6 North Somerset, Cheddar | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | 6/1843 | MANCH |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Dundry | George Henry Kendrick Thwaites | George Lloyd | 8/1846 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Dundry | George Henry Kendrick Thwaites | George Henry Kendrick Thwaites | 8/1846 | K |
| Cruciata laevipes | GB, VC6 North Somerset, Keynsham | George Henry Kendrick Thwaites | William Hadden Beeby | 1841 | SLBI |
| Clinopodium ascendens | GB, VC6 North Somerset, Leigh Woods | George Henry Kendrick Thwaites | George Stephen West | 8/1846 | BIRM |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Leigh Woods | George Henry Kendrick Thwaites | John Bland Wood William Wilson | 4/1842 | MANCH |
| Veronica polita | GB, VC6 North Somerset, Leigh Woods | George Henry Kendrick Thwaites | | 9/1844 | K |
| Veronica spicata | GB, VC6 North Somerset, Leigh Woods | George Henry Kendrick Thwaites | John Ralfs | | SLBI |
| Veronica spicata | GB, VC6 North Somerset, Leigh Woods | George Henry Kendrick Thwaites | William Jackson Hooker | | K |
| Vicia sylvatica | GB, VC6 North Somerset, Stockwood | George Henry Kendrick Thwaites | Botanical Society of London | 1841 | SLBI |
| Parapholis incurva | GB, VC6 North Somerset, Uphill | | Botanical Society of London Mantua And Montferrat George Henry Kendrick Thwaites | | BON |
+ | Lathyrus aphaca | GB, VC6 North Somerset, Wedmore | George Henry Kendrick Thwaites | | 1843 | MANCH |
+ | Lathyrus aphaca | GB, VC6 North Somerset, Wedmore | George Henry Kendrick Thwaites | John Bland Wood | 6/1843 | MANCH |
+ | Lathyrus aphaca | GB, VC6 North Somerset, Wedmore | George Henry Kendrick Thwaites | John Bland Wood | 6/1843 | MANCH |
| Phleum arenarium | GB, VC6 North Somerset, Weston-super-Mare | George Henry Kendrick Thwaites | | 6/1843 | BON |
| Lithospermum purpureocaeruleum | GB, VC6 North Somerset, Yatton | George Henry Kendrick Thwaites | William Hadden Beeby | 1842 | SLBI |
+ | Anagallis minima | GB, VC17 Surrey, Esher Common | George Henry Kendrick Thwaites | Charles Bailey Hewett Cottrell Watson William Lowndes Notcutt | | MANCH |
+ | Bupleurum falcatum | GB, VC18 South Essex, Chelmsford (W of),Norton Heath | John Kay | Charles Bailey John Ray Hardy George Henry Kendrick Thwaites | | MANCH |
+ | Bupleurum falcatum | GB, VC18 South Essex, Chelmsford (W of),Norton Heath | Doubleday | Charles Bailey William Lowndes Notcutt George Henry Kendrick Thwaites | | MANCH |
+ | Ophrys insectifera | GB, VC25 East Suffolk, Bungay | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | | MANCH |
+ | Atriplex pedunculata | GB, VC27 East Norfolk, Great Yarmouth | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | 1843 | MANCH |
+ | Bupleurum tenuissimum | GB, VC34 West Gloucestershire, Bristol | George Henry Kendrick Thwaites | John Bland Wood | 8/1842 | MANCH |
| Carex digitata | GB, VC34 West Gloucestershire, Bristol | George Henry Kendrick Thwaites | Charles Bailey | | MANCH |
| Carex digitata | GB, VC34 West Gloucestershire, Bristol | | Botanical Society of London Charles Bailey George Henry Kendrick Thwaites | 4/1842 | MANCH |
+ | Spiranthes spiralis | GB, VC34 West Gloucestershire, Bristol | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | 8/1842 | MANCH |
| Valerianella dentata | GB, VC34 West Gloucestershire, Bristol | George Henry Kendrick Thwaites | William Hadden Beeby | | SLBI |
| Nasturtium sylvestre | GB, VC34 West Gloucestershire, Bristol, Crew's Hole | George Henry Kendrick Thwaites | John Bland Wood | 6/1842 | MANCH |
+ | Habenaria viride | GB, VC34 West Gloucestershire, Bristol,Filton | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | 6/1841 | MANCH |
+ | Cardamine impatiens | GB, VC34 West Gloucestershire, Bristol,Stapleton | | Charles Bailey George Henry Kendrick Thwaites John Wilson Rimington Spencer Henry Bickham | 6/1842 | MANCH |
+ | Cardamine impatiens | GB, VC34 West Gloucestershire, Bristol,Stapleton | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | 6/1842 | MANCH |
+ | Arabis scabra | GB, VC34 West Gloucestershire, Clifton | George Henry Kendrick Thwaites | Botanical Society of London Charles Bailey John Ray Hardy George Henry Kendrick Thwaites | 4/1878 | MANCH |
+ | Arabis scabra | GB, VC34 West Gloucestershire, Clifton | George Henry Kendrick Thwaites | Schill A J Mary Gray George Henry Kendrick Thwaites Samuel Octavus Gray | 5/1841 | MANCH |
+ | Arabis scabra | GB, VC34 West Gloucestershire, Clifton | George Henry Kendrick Thwaites | John Harbord Lewis | 4/1842 | MANCH |
+ | Arabis scabra | GB, VC34 West Gloucestershire, Clifton | | George Henry Kendrick Thwaites John Bland Wood | 4/1842 | MANCH |
+ | Calamintha arvensis | GB, VC34 West Gloucestershire, Clifton | George Henry Kendrick Thwaites | Charles Bailey William Lowndes Notcutt | 7/1842 | MANCH |