| Achillea ptarmica | GB, VC26 West Suffolk, Wissington | John Durbin Gray | | 7/1891 | SLBI |
| Amaranthus blitum | GB, VC26 West Suffolk, Stoke by Nayland | John Durbin Gray | | 7/1889 | ABS |
| Amaranthus blitum | GB, VC26 West Suffolk, Stoke by Nayland | John Durbin Gray | Harold Stuart Thompson | 7/1889 | BIRM |
| Amaranthus blitum | GB, VC26 West Suffolk, Stoke by Nayland | John Durbin Gray | Augustin Ley Edward Francis Linton | 8/1881 | BIRM |
| Apera interrupta | GB, VC26 West Suffolk, Barnham | Edward Francis Linton John Durbin Gray | Botanical Exchange Club of The British Isles Robert Large Baker | 25/8/1869 | BIRM |
+ | Arnoseris minima | GB, VC11 South Hampshire, Christchurch, Hengistbury Head | John Durbin Gray | Charles Edgar Salmon | 1895 | MANCH |
+ | Artemisia campestris | GB, VC26 West Suffolk, Culford Heath | John Durbin Gray | Botanical Exchange Club Charles Bailey Edward Francis Linton | 3/9/1879 | MANCH |
| Asplenium obovatum subsp. lanceolatum | GB, VC113 Channel Islands, Guernsey | John Durbin Gray | | 6/1890 | SHYB |
| Avena sterilis subsp. ludoviciana | GB, VC19 North Essex, Frinton | John Durbin Gray | Harold Stuart Thompson | 9/1889 | BIRM |
| Briza maxima | GB, VC113 Channel Islands, Guernsey,Vazon Bay | John Durbin Gray | William Hunt Painter | 6/1895 | ABS |
| Callitriche truncata | GB, VC113 Channel Islands, Guernsey,Grande Mare | John Durbin Gray | | 7/1895 | SHYB |
| Carex acutiformis | GB, VC26 West Suffolk, Brandon | John Durbin Gray | | 6/1882 | ABS |
| Carex acutiformis | GB, VC26 West Suffolk, Brandon | John Durbin Gray | Arthur Bennett | 6/1887 | BM |
| Carex acutiformis | GB, VC26 West Suffolk, Nayland | John Durbin Gray | Edward Francis Linton | 7/1893 | BM |
| Carex elongata | GB, VC40 Shropshire, Criftins | John Durbin Gray | | 7/1893 | BM |
| Carex riparia | GB, VC26 West Suffolk, Nayland | John Durbin Gray | Edward Francis Linton | 7/1893 | BM |
| Centaurea paniculata | GB, VC113 Channel Islands, Saint Ouen's Bay, Jersey | John Durbin Gray | William Hunt Painter | 7/1884 | SHYB |
+ | Cytisus scoparius subsp. maritimus | GB, VC113 Channel Islands, Guernsey,Pleimont | John Durbin Gray | Charles Bailey | 6/1894 | MANCH |
+ | Echium plantagineum | GB, VC113 Channel Islands, Guernsey,Moulin Huet Bay | John Durbin Gray | | 24/7/1894 | MANCH |
+ | Filago gallica | GB, VC19 North Essex, Berechurch | John Durbin Gray | Charles Bailey Elizabeth Anne Lomax | 9/1882 | MANCH |
| Hydrocharis morsus-ranae | GB, VC26 West Suffolk, Stoke by Nayland | John Durbin Gray | Alexander Somerville | 8/1893 | E |
+ | Hypericum linariifolium | GB, VC113 Channel Islands, Guernsey | John Durbin Gray | Charles Edgar Salmon | 7/1894 | MANCH |
| Limonium binervosum | GB, VC15 East Kent, Dover GB, VC15 East Kent, Folkestone | John Durbin Gray | William Hunt Painter | 7/1886 | ABS |
| Lotus corniculatus | GB, VC15 East Kent, Folkestone Warren | John Durbin Gray | | 7/1887 | BIRM |
| Lotus subbiflorus | GB, VC11 South Hampshire, Southbourne | John Durbin Gray | William Hunt Painter | 7/1887 | ABS |
| Luronium natans | GB, VC40 Shropshire, Llangollen Canal at Ellesmere | John Durbin Gray | Alexander Somerville | 7/1893 | E |
| Lythrum hyssopifolia | GB, VC113 Channel Islands, Saint Ouen's Bay, Jersey | John Durbin Gray | William Hunt Painter | 7/1894 | SHYB |
| Medicago minima | GB, VC25 East Suffolk, Felixstowe | John Durbin Gray | William Hunt Painter | | ABS |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Helston | James Cunnack | Botanical Exchange Club of The British Isles John Durbin Gray | 9/1881 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Malvern | Alfred Rayney Waller | John Durbin Gray | 7/1884 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Old Storridge Common | James Henry Augustus Steuart | John Durbin Gray Robert Lloyd Praeger | 8/1892 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Warwick | John Fraser | John Durbin Gray | 10/9/1878 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Warwick | John Fraser | John Durbin Gray | 10/9/1878 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC64 Mid-west Yorkshire, Tadcaster | J Jackson | John Durbin Gray | 7/1881 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC61,VC62,VC64, York | Henry John Wilkinson | John Durbin Gray | 9/1883 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | IE, Donegal, Rossmore | Edward Francis Linton | John Durbin Gray | 6/8/1885 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | Upper Ouby | John Fraser John (Joannis) Fraser | John Durbin Gray | 7/1882 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC10 Isle of Wight, Newbridge | James Henry Augustus Steuart | John Durbin Gray | 9/1894 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Oxford | J Gray | John Durbin Gray | 1830 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Oxford | J Gray | J Gray John Durbin Gray | 1830 | CGE |