| Carex chordorrhiza | GB, VC77,VC78,VC83, Pentland Hills | Nicholas Tyacke | John Thomas Irvine Boswell-Syme William Williamson Newbould | 1843 | BM |
| Carex vulpina | GB, VC13 West Sussex, Chichester | | John Thomas Irvine Boswell-Syme William Williamson Newbould | 6/1843 | BM |
+ | Neottia nidus-avis | GB, VC13 West Sussex, Goodwood | William Williamson Newbould | John Ray Hardy | 6/1843 | MANCH |
| Cephalanthera longifolia | GB, VC13 West Sussex, Goodwood | William Williamson Newbould | | 6/1843 | SLBI |
| Limonium humile | GB, VC13 West Sussex, Chichester | | Frederick Townsend William Williamson Newbould | 7/1843 | SLBI |
| Lepidium draba | GB, VC15 East Kent, Ramsgate | William Williamson Newbould | | 7/1843 | SLBI |
+ | Medicago minima | GB, VC15 East Kent, Ramsgate,Pegwell Bay | William Williamson Newbould | Charles Bailey John Hardy | 7/1843 | MANCH |
| Lathyrus japonicus subsp. maritimus | GB, VC15 East Kent, Walmer Castle | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 7/1843 | SLBI |
| Carex pseudocyperus | GB, VC15 East Kent, Sandwich | William Williamson Newbould | John Thomas Irvine Boswell-Syme Frederick Janson Hanbury | 20/7/1843 | BM |
| Carex pseudocyperus | GB, VC15 East Kent, Ramsgate | William Williamson Newbould | Charles Bailey John Hardy | 24/7/1843 | MANCH |
| Silene conica | GB, VC15 East Kent, Sandwich | William Williamson Newbould | | 8/1843 | K |
| Lathyrus japonicus subsp. maritimus | GB, VC15 East Kent, Walmer Castle | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 8/1843 | SLBI |
+ | Spiranthes spiralis | GB, VC63 South-west Yorkshire, Doncaster | William Williamson Newbould | Charles Bailey John Ray Hardy | 9/1843 | MANCH |
| Suaeda maritima | GB, VC13 West Sussex, Chichester | William Williamson Newbould | | 29/9/1843 | SLBI |
+ | Euphorbia exserta | GB, VC13 West Sussex, Chichester | William Williamson Newbould | John Hardy | 10/1843 | MANCH |
| Potamogeton polygonifolius | GB, VC13 West Sussex, Chichester | William Williamson Newbould | John Hardy | 10/1843 | MANCH |
| Dianthus armeria | GB, VC13 West Sussex, Chichester | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 10/1843 | SLBI |
| Aethusa cynapium subsp. agrestis | GB, VC13 West Sussex, Chichester | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 10/1843 | SLBI |
| Cephalanthera longifolia | GB, VC13 West Sussex, Goodwood | William Williamson Newbould | Allan Octavian Hume Frederick Townsend William Williamson Newbould | 6/10/1843 | SLBI |
+ | Scandix pecten-veneris | GB, VC62 North-east Yorkshire, Whitby,Saltwick Bay | William Williamson Newbould | | 1844 | MANCH |
+ | Hyoscyamus niger | GB, England, Cambridge | William Williamson Newbould | Charles Bailey John Hardy | 1844 | MANCH |
| Carex divisa | GB, VC10 Isle of Wight, Gurnard Bay | Frederick Townsend | Frederick Townsend William Williamson Newbould | 6/1844 | BM |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC29 Cambridgeshire, Coton | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 26/7/1844 | SLBI |
| Ruppia rostellata | GB, VC13 West Sussex, Chichester | William Williamson Newbould | Frederick Townsend | 9/1844 | SLBI |
| Persicaria mitis | GB, VC31 Huntingdonshire, Bluntisham | William Williamson Newbould | Frederick Townsend | 1845 | SLBI |
| Dipsacus fullonum | GB, VC31 Huntingdonshire, Colne | William Williamson Newbould | Frederick Townsend | 1845 | SLBI |
| Sagittaria sagittifolia | GB, VC31 Huntingdonshire, Bluntisham | William Williamson Newbould | Frederick Townsend | 5/1845 | SLBI |
| Butomus umbellatus | GB, VC31 Huntingdonshire, Bluntisham | William Williamson Newbould | John Hardy | 7/1845 | MANCH |
| Petroselinum segetum | GB, VC31 Huntingdonshire, Bluntisham | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 9/1845 | SLBI |
| Petroselinum segetum | GB, VC31 Huntingdonshire, Bluntisham | William Williamson Newbould | Frederick Townsend | 9/1845 | SLBI |
| Rumex maritimus | GB, VC31 Huntingdonshire, Bluntisham | William Williamson Newbould | Frederick Townsend | 13/9/1845 | SLBI |
| Peucedanum palustre | GB, VC31 Huntingdonshire, Holme | William Williamson Newbould | Allan Octavian Hume | 16/9/1845 | SLBI |
+ | Peucedanum palustre | GB, VC31 Huntingdonshire, Holme Fen | William Williamson Newbould | Charles Bailey I Hardy John Ray Hardy | 16/9/1845 | MANCH |
| Rumex maritimus | GB, VC31 Huntingdonshire, Holme Fen | William Williamson Newbould | Frederick Townsend | 16/9/1845 | SLBI |
| Orchis mascula | GB, VC31 Huntingdonshire, Holme Fen | William Williamson Newbould | Charles Bailey John Hardy | 1846 | MANCH |
| Cirsium heterophyllum | GB, VC57 Derbyshire, Hathersage | William Williamson Newbould | Frederick Townsend | 1846 | SLBI |
| Rubus latifolius | GB, VC83 Midlothian, Edinburgh | William Williamson Newbould | | 1846 | SLBI |
| Ludwigia palustris | GB, VC113 Channel Islands, Jersey, Saint Peters | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 1846 | SLBI |
+ | Carex appropinquata | GB, VC61 South-east Yorkshire, Heslington Fields | William Williamson Newbould | Charles Bailey John Hardy | 7/2/1846 | MANCH |
| Hammarbya paludosa | GB, VC87 West Perthshire, Inverarnan | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 8/4/1846 | SLBI |