+ | Primula elatior | GB, VC19 North Essex, Essex, Hatfield-Broad-Oak, Hatfield Forest | George Charles Brown | Frederick Ernest Weiss | 13/4/1925 | MANCH |
| Carex dioica | GB, VC28 West Norfolk, Carbrooke Fen | Frederick Robinson | James Eddowes Cooper George Charles Brown | 25/5/1918 to 26/5/1918 | BM |
| Populus balsamifera x deltoides = P. x jackii | GB, VC26 West Suffolk, Brent Eleigh | George Charles Brown | Douglas Montague Heath Frederick Robinson | 19/8/1915 | BIRM |
| Carex divisa | GB, VC19 North Essex, Clacton-on-Sea | George Charles Brown | Botanical Exchange Club of The British Isles William Charles Barton | 5/6/1911 | BM |
| Mentha arvensis x spicata = M. x gracilis | GB, VC19 North Essex, Alphamstone Cultivated | George Charles Brown | Druce Herbarium, Oxford J Fraser | 7/9/1916 | OXF |
| Mentha longifolia | GB, VC26 West Suffolk, Nayland | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 9/9/1926 | SLBI |
| Mentha piperita var. piperita | GB, VC19 North Essex, Colchester, Middlewick Rifle Ranges | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown J Fraser | 9/8/1925 16/8/1925 | K |
| Mentha spicata x suaveolens = M. x villosa | GB, VC19 North Essex, West Bergholt | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 10/9/1931 | SLBI |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC19 North Essex, West Bergholt | George Charles Brown | George Charles Brown J Fraser | 10/9/1931 | K |
| Salix cinerea | GB, VC19 North Essex, East Donyland | George Charles Brown | George Charles Brown Botanical Society & Exchange Club of The British Isles | 14/3/1926 15/8/1926 | MANCH |
| Salix viminalis x caprea = S. x smithiana | GB, VC19 North Essex, Berechurch | George Charles Brown | Botanical Society & Exchange Club of The British Isles Joseph Edward Little | 21/5/1923 to 14/8/1923 | CGE |
| Carex divisa | GB, VC19 North Essex, Wivenhoe | George Charles Brown | Botanical Exchange Club of The British Isles William Charles Barton | 26/6/1912 | BM |
| Mentha arvensis x spicata = M. x gracilis | GB, VC19 North Essex, Alphamstone Cultivated | George Charles Brown | George Claridge Druce | 1/9/1920 | OXF |
| Rumex salicifolius | GB, VC19 North Essex, Colchester,Hythe | George Charles Brown | Botanical Exchange Club of The British Isles | 26/7/1923 | SLBI |
| Stellaria alsine | GB, VC38 Warwickshire, Princethorpe | Linnaeus Cumming | Dulwich College George Charles Brown | 13/6/1921 | SLBI |
| Althaea officinalis | GB, VC19 North Essex, Brightlingsea Cultivated | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 1931 1932 | SLBI |
| Atriplex patula | GB, Lancashire, Seacoast | A Bamford | George Charles Brown | 1912 | BIRM |
| Carex divisa | GB, VC19 North Essex, Wivenhoe | George Charles Brown | Botanical Exchange Club of The British Isles Frederick Janson Hanbury George Charles Brown | 26/6/1912 | BM |
| Carex divisa | GB, VC19 North Essex, Wivenhoe | George Charles Brown | Botanical Exchange Club of The British Isles Robert Stephen Adamson | 26/6/1912 | BM |
| Carex divisa | GB, VC19 North Essex, Wivenhoe | George Charles Brown | Botanical Exchange Club of The British Isles | 26/6/1912 | E |
| Carex laevigata | GB, VC19 North Essex, Middlewick | George Charles Brown | Botanical Exchange Club of The British Isles | 17/6/1923 | E |
| Carex otrubae x remota = C. x pseudoaxillaris | GB, VC19 North Essex, Easthorpe | George Charles Brown | Botanical Exchange Club of The British Isles Frederick Janson Hanbury | 27/6/1915 | BM |
+ | Centaurea calcitrapa | GB, VC19 North Essex, Colchester,Hythe Quay | George Charles Brown | Botanical Society & Exchange Club of The British Isles | 16/6/1914 | MANCH |
| Chenopodium opulifolium | GB, VC19 North Essex, Colchester | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 28/8/1927 | SLBI |
| Cuscuta | GB, VC19 North Essex, Stanway | George Charles Brown | Botanical Exchange Club of The British Isles | 16/9/1923 | SLBI |
| Dactylorhiza fuchsii | GB, VC19 North Essex, Walton on the Naze | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 26/6/1932 | SLBI |
| Dactylorhiza fuchsii | GB, VC19 North Essex, Walton-on-the-Naze | George Charles Brown | George Charles Brown Job Edward Lousley Botanical Exchange Club of The British Isles | 26/6/1932 | SLBI |
| Euphorbia esula x waldsteinii = E. x pseudovirgata | GB, VC19 North Essex, Colchester | George Charles Brown | Botanical Society of The British Isles George Charles Brown Job Edward Lousley | 29/5/1927 | SLBI |
| Euphrasia nemorosa | GB, VC19 North Essex, Fordham | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 27/9/1931 | SLBI |
| Festuca arundinacea | GB, VC19 North Essex, Colchester | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 4/9/1931 | K |
| Festuca arundinacea | GB, VC19 North Essex, Colchester,Hythe Quay | Charles Edward Britton George Charles Brown | George Charles Brown Botanical Exchange Club of The British Isles | 4/9/1931 | K |
| Fritillaria meleagris | GB, VC7 North Wiltshire, Oaksey | | Botanical Exchange Club of The British Isles George Charles Brown | 3/5/1916 | SLBI |
| Fumaria capreolata subsp. babingtonii | GB, VC19 North Essex, Fingringhoe | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 5/6/1930 | SLBI |
| Galium verum | GB, VC19 North Essex, Stanway | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 11/7/1933 | SLBI |
| Galium verum x mollugo = G. x pomeranicum | GB, VC19 North Essex, Stanway | George Charles Brown | Botanical Society & Exchange Club of The British Isles | 30/6/1913 | MANCH |
| Lathyrus linifolius | GB, VC19 North Essex, Tiptree Heath | George Charles Brown | Botanical Exchange Club of The British Isles Job Edward Lousley | 14/5/1916 | SLBI |
| Legousia hybrida | GB, VC26 West Suffolk, Nayland | George Charles Brown | Dulwich College | 29/6/1920 | SLBI |
| Limonium binervosum | GB, VC19 North Essex, Saint Osyth | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 17/7/1930 | SLBI |
| Limonium humile | GB, VC19 North Essex, Alresford | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 5/8/1935 | SLBI |
| Limonium vulgare | GB, VC19 North Essex, Alresford | George Charles Brown | Botanical Exchange Club of The British Isles Charles Baylis Green | 28/8/1913 | SLBI |