| Linum bienne | GB, VC19 North Essex, Rowhedge | George Charles Brown | Botanical Exchange Club of The British Isles | 17/6/1923 | SLBI |
| Rubus criniger | GB, VC19 North Essex, Stanway | George Charles Brown | Botanical Exchange Club of The British Isles | 17/7/1923 | SLBI |
| Rubus criniger | GB, VC19 North Essex, Stanway | George Charles Brown | | 19/7/1923 | SLBI |
| Rubus corylifolius | GB, VC19 North Essex, Colchester | George Charles Brown | Botanical Exchange Club of The British Isles | 22/7/1923 | SLBI |
| Rubus platyacanthus | GB, VC19 North Essex, Colchester,Middlewick | George Charles Brown | Botanical Exchange Club of The British Isles | 22/7/1923 | SLBI |
| Rumex salicifolius | GB, VC19 North Essex, Colchester,Hythe | George Charles Brown | Botanical Exchange Club of The British Isles | 26/7/1923 | SLBI |
| 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 |
| Cuscuta | GB, VC19 North Essex, Stanway | George Charles Brown | Botanical Exchange Club of The British Isles | 16/9/1923 | SLBI |
+ | Primula elatior | GB, VC19 North Essex, Essex, Hatfield-Broad-Oak, Hatfield Forest | George Charles Brown | Frederick Ernest Weiss | 13/4/1925 | MANCH |
| Mentha aquatica x spicata = M. x piperita | GB, VC19 North Essex, Colchester | George Charles Brown | Botanical Exchange Club of The British Isles | 9/8/1925 16/8/1925 | OXF |
| 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 |
| 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 |
+ | 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 |
| Potentilla erecta x anglica = P. x suberecta | GB, VC19 North Essex, Tiptree Heath | George Charles Brown | Job Edward Lousley | 3/6/1926 | SLBI |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC19 North Essex, Berechurch | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 11/7/1926 | 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Polygonum cognatum | GB, VC19 North Essex, Colchester | George Charles Brown | Botanical Exchange Club of The British Isles Richard Barker Ullman Patrick Martin Hall | 22/7/1928 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC19 North Essex, Alphamstone | George Charles Brown | Richard Barker Ullman | 26/8/1928 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC19 North Essex, Alphamstone | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 26/8/1928 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC19 North Essex, Alphamstone | George Charles Brown | Botanical Society & Exchange Club of The British Isles George Charles Brown | 26/8/1928 | K |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Rubus raduloides | GB, VC19 North Essex, Colchester | George Charles Brown | | 21/7/1931 | SLBI |
| Rubus rufescens | GB, VC19 North Essex, Colchester | George Charles Brown | Botanical Exchange Club of The British Isles | 21/7/1931 | 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 |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC19 North Essex, West Bergholt | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown | 10/9/1931 | 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 |
| 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 |
| 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 |
| Vicia lutea | GB, VC19 North Essex, Saint Osyth | George Charles Brown | Botanical Exchange Club of The British Isles George Charles Brown Job Edward Lousley | 12/6/1932 | SLBI |