| Rumex salicifolius | GB, VC19 North Essex, Colchester,Hythe | George Charles Brown | Botanical Exchange Club of The British Isles | 26/7/1923 | SLBI |
+ | Silene gallica | GB, VC19 North Essex, Colchester,Hythe | George Charles Brown | Botanical Society & Exchange Club of The British Isles | 16/6/1913 | MANCH |
+ | Centaurea calcitrapa | GB, VC19 North Essex, Colchester,Hythe Quay | George Charles Brown | Botanical Society & Exchange Club of The British Isles | 16/6/1914 | MANCH |
| 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 |
| Medicago polymorpha | GB, VC19 North Essex, Colchester,Hythe Quay | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 16/8/1932 | SLBI |
| Medicago polymorpha | GB, VC19 North Essex, Colchester,Hythe Quay | George Charles Brown | Botanical Exchange Club of The British Isles | 16/8/1932 | SLBI |
| Plantago coronopus | GB, VC19 North Essex, Colchester,Hythe Quay | Charles Edward Britton George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 27/9/1928 | K |
| Plantago coronopus | GB, VC19 North Essex, Colchester,Hythe Quay | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown | 27/9/1928 | K |
| Spergularia rubra | GB, VC19 North Essex, Colchester,Hythe Quay | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 3/6/1927 to 9/1927 | SLBI |
+ | Vicia lutea | GB, VC19 North Essex, Colchester,Hythe Quay | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown | 13/4/1926 | MANCH |
| Rubus imbricatus | GB, VC19 North Essex, Colchester,Middlewick | George Charles Brown | George Charles Brown | 15/7/1932 | SLBI |
| Rubus platyacanthus | GB, VC19 North Essex, Colchester,Middlewick | George Charles Brown | Botanical Exchange Club of The British Isles | 22/7/1923 | SLBI |
| Viola | GB, VC19 North Essex, Dedham | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 11/6/1939 | SLBI |
| Rubus anisacanthos | GB, VC19 North Essex, East Donyland | George Charles Brown | Botanical Exchange Club of The British Isles | 8/7/1936 | SLBI |
| Rubus anisacanthos | GB, VC19 North Essex, East Donyland | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown | 8/7/1936 | SLBI |
| 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 |
| Carex otrubae x remota = C. x pseudoaxillaris | GB, VC19 North Essex, Easthorpe | George Charles Brown | Botanical Society & Exchange Club of The British Isles Charles Bailey | 27/6/1915 | MANCH |
| 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 |
+ | Primula elatior | GB, VC19 North Essex, Essex, Hatfield-Broad-Oak, Hatfield Forest | George Charles Brown | Frederick Ernest Weiss | 13/4/1925 | MANCH |
| 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 |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC19 North Essex, Fingringhoe | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 12/8/1926 | 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 |
| Rubus pulcherrimus | GB, VC19 North Essex, Great Bromley | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 14/7/1932 | SLBI |
| Potentilla erecta x anglica = P. x suberecta | GB, VC19 North Essex, Henny | George Charles Brown | Botanical Society & Exchange Club of The British Isles Charles Bailey | 4/7/1915 | MANCH |
| Ulmus campestris | GB, VC19 North Essex, Horkesley | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 4/9/1938 | SLBI |
| Rubus criniger | GB, VC19 North Essex, Layer de la Haye | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown | 10/7/1938 | SLBI |
| Rubus nemoralis | GB, VC19 North Essex, Lexden | George Charles Brown | Botanical Exchange Club of The British Isles | 10/7/1922 | SLBI |
| Viola | GB, VC19 North Essex, Lexden | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 16/9/1928 | SLBI |
| Viola arvensis | GB, VC19 North Essex, Lexden | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 20/9/1931 | SLBI |
+ | Mentha arvensis x aquatica = M. x verticillata | GB, VC19 North Essex, Liptree Heath | George Charles Brown | | 1/9/1912 | MANCH |
| Rubus londinensis | GB, VC19 North Essex, Marks Hall | George Charles Brown | | 17/7/1932 | SLBI |
| Rubus londinensis | GB, VC19 North Essex, Marks Hall | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 17/7/1932 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC19 North Essex, Mersea Island | George Charles Brown | | 9/1912 | CGE |
| Carex laevigata | GB, VC19 North Essex, Middlewick | George Charles Brown | Botanical Exchange Club of The British Isles | 17/6/1923 | E |
| Mentha aquatica | GB, VC19 North Essex, Pebmarsh | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Harold Stuart Thompson | 10/9/1934 | BIRM |
| Mentha aquatica | GB, VC19 North Essex, Pebmarsh | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown | 6/9/1934 | SLBI |
| Mentha aquatica | GB, VC19 North Essex, Pebmarsh | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 6/9/1934 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC19 North Essex, Peldon | George Charles Brown Herbert Stanley Redgrove | Druce Herbarium, Oxford | 30/8/1923 | OXF |
| Linum bienne | GB, VC19 North Essex, Rowhedge | George Charles Brown | Botanical Exchange Club of The British Isles | 17/6/1923 | 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 |