+ | 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 |
| Ruppia rostellata | GB, VC13 West Sussex, Chichester | William Williamson Newbould | Frederick Townsend | 9/1844 | SLBI |
| Trifolium squamosum | GB, VC13 West Sussex, Chichester | William Williamson Newbould | | 7/1846 | SLBI |
| Trifolium squamosum | GB, VC13 West Sussex, Chichester | William Williamson Newbould | | 7/1846 | SLBI |
| Sagittaria sagittifolia | GB, VC13 West Sussex, Chichester | William Williamson Newbould | Frederick Townsend | 10/1846 | SLBI |
+ | 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 |
| Cephalanthera longifolia | GB, VC13 West Sussex, Goodwood | William Williamson Newbould | Allan Octavian Hume Frederick Townsend William Williamson Newbould | 6/10/1843 | SLBI |
| Carex flacca | GB, VC13 West Sussex, Mundham | William Williamson Newbould | | 1843 | E |
+ | Vicia lutea | GB, VC13 West Sussex, Shoreham | | William Williamson Newbould | 5/7/1832 | MANCH |
| Lepidium draba | GB, VC15 East Kent, Ramsgate | William Williamson Newbould | | 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 |
| 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 | 7/1843 | SLBI |
| Lathyrus japonicus subsp. maritimus | GB, VC15 East Kent, Walmer Castle | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 8/1843 | SLBI |
| Lamium album | GB, VC17 Surrey, Kew | William Williamson Newbould | William Hadden Beeby | 5/1885 | SLBI |
| Polygonum aviculare | GB, VC17 Surrey, Norwood | Frederick Townsend William Williamson Newbould | Allan Octavian Hume | 27/8/1864 | SLBI |
| Arctium nemorosum | GB, VC17 Surrey, Surbiton | William Williamson Newbould | William Hadden Beeby | 8/1883 | SLBI |
| Lathyrus tuberosus | GB, VC18 South Essex, Canvey Island | Frederick Arnold Lees William Williamson Newbould | Frederick Arnold Lees William Hadden Beeby | 21/6/1872 | SLBI |
| Rumex crispus x obtusifolius = R. x pratensis | GB, VC19 North Essex, Broxbourne | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 19/7/1848 | SLBI |
| Carex otrubae x remota = C. x pseudoaxillaris | GB, VC19 North Essex, Inworth | Ezekiel George Varenne | William Williamson Newbould | 7/1847 | BM |
| Carex remota | GB, VC20 Hertfordshire, Buntingford | William Williamson Newbould | William Williamson Newbould | 3/8/1847 | BM |
| Carex otrubae x remota = C. x pseudoaxillaris | GB, VC20 Hertfordshire, Buntingford | William Williamson Newbould | | 21/7/1848 | BM |
| Carex remota x vulpina = C. axilaris | GB, VC20 Hertfordshire, Buntingford | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 21/7/1848 | SLBI |
| Epipactis phyllanthes | GB, VC20 Hertfordshire, Buntingford, Throcking | William Williamson Newbould | Frederick Townsend | 8/4/1847 | SLBI |
| Carex otrubae x remota = C. x pseudoaxillaris | GB, VC20 Hertfordshire, Layston | William Williamson Newbould | | | BM |
| Bromus commutatus | GB, VC21 Middlesex, Acton | William Williamson Newbould | Augustin Ley | 6/1867 | BIRM |
| Carex paniculata | GB, VC21 Middlesex, Willesden | William Williamson Newbould | John Thomas Irvine Boswell-Syme | 7/1867 | BM |
| Carex riparia | GB, VC21 Middlesex, Willesden | William Williamson Newbould | John Thomas Irvine Boswell-Syme | 7/1867 | BM |
| Rumex obtusifolius var. sylvestris | GB, VC17,VC21, Putney | William Williamson Newbould | Frederick Townsend | | SLBI |
| Carex paniculata | GB, VC25 East Suffolk, Belton Fen | William Williamson Newbould | | 8/6/1847 | BM |
| Urtica pilulifera | GB, VC25 East Suffolk, Lowestoft | William Williamson Newbould | Allan Octavian Hume Frederick Townsend | 1854 | SLBI |
| Carex divisa | GB, VC25 East Suffolk, Walton | William Williamson Newbould | William Williamson Newbould | 8/1864 | BM |
| Crepis foetida | GB, VC26 West Suffolk, Brandon | William Williamson Newbould | Frederick Townsend | 4/7/1848 | SLBI |
| Medicago sativa subsp. falcata | GB, VC26 West Suffolk, Thetford | William Williamson Newbould | Frederick Townsend | 15/8/1851 | SLBI |
| Carex divisa | GB, VC27 East Norfolk, Yarmouth | William Williamson Newbould | | 7/7/1847 | BM |
| Ranunculus baudotii | GB, VC28 West Norfolk, Burnham Norton | William Williamson Newbould | Allan Octavian Hume Charles Cardale Babington Frederick Townsend | 24/5/1852 | SLBI |