| Callitriche platycarpa | GB, VC23 Oxfordshire, Otmoor | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles John Frederick Gustav Chapple | 4/5/1937 | K |
| Fumaria officinalis subsp. wirtgenii | GB, VC23 Oxfordshire, Henley on Thames Cultivated | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles Job Edward Lousley | 23/7/1932 | SLBI |
+ | Juncus compressus | GB, VC22,VC23, Oxford | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles William Harold Pearsall | 30/7/1934 | MANCH |
| Juncus compressus | GB, VC23 Oxfordshire, Oxford, Pixey Mead | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles | 3/7/1934 | SLBI |
| Mentha pulegium | GB, VC3 South Devon, Start Point | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles John Frederick Gustav Chapple | 12/8/1936 | K |
| Taraxacum | GB, VC23 Oxfordshire, Marston | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles John Frederick Gustav Chapple | 13/5/1936 | SLBI |
| Blumenbachia hieronymii | GB, VC23 Oxfordshire, Oxford | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford | 9/11/1938 | SLBI |
| Blumenbachia hieronymii | GB, VC23 Oxfordshire, Oxford | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford | 9/11/1938 | SLBI |
| Carex spicata | GB, VC23 Oxfordshire, Beckley | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford Patrick Martin Hall | 14/6/1932 | BM |
| Carex spicata | GB, VC23 Oxfordshire, Beckley | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 14/6/1932 | E |
| Carex vulpina | GB, VC23 Oxfordshire, Otmoor | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford | 1/8/1946 | SLBI |
| Carex vulpina | GB, VC23 Oxfordshire, Otmoor | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford Martin F Gardner & Sabina G Knees | 1/8/1936 1/8/1946 | E |
| Fagopyrum esculentum | GB, VC22 Berkshire, Wootton | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 7/1932 | SLBI |
| Juncus articulatus | GB, VC22 Berkshire, Wytham | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 29/9/1946 | SLBI |
| Myriophyllum verticillatum | GB, VC30 Bedfordshire, Eaton Socon | John Frederick Gustav Chapple John Patrick Micklethwait Brenan | Druce Herbarium, Oxford | 11/8/1946 | SLBI |
| Veronica agrestis | GB, VC39 Staffordshire, Burton on Trent | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles Druce Herbarium, Oxford Job Edward Lousley | 31/8/1938 | SLBI |
| Veronica agrestis | GB, VC39 Staffordshire, Burton on Trent | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 31/8/1938 | SLBI |
| Viola hirta | GB, VC23 Oxfordshire, Minster Lovell | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford Job Edward Lousley | 20/4/1934 | SLBI |
| Bupleurum tenuissimum | GB, VC14 East Sussex, Pevensey Bay | Charles Bailey | Botanical Exchange Club of The British Isles Job Edward Lousley John Frederick Gustav Chapple | 12/10/1905 | SLBI |
| Erodium maritimum | GB, VC49 Caernarvonshire, Little Ormes Head | Charles Bailey | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 17/9/1879 27/9/1879 | SLBI |
| Ranunculus aquatilis | GB, VC23 Oxfordshire, Menmarsh | John Frederick Gustav Chapple John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 29/4/1937 | SLBI |
| Veronica anagallis-aquatica | GB, VC23 Oxfordshire, Oxford, Port Meadow | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles John Frederick Gustav Chapple | 30/7/1936 | SLBI |
| Apium nodiflorum | GB, VC23 Oxfordshire, Oxford, Port Meadow | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 13/8/1935 | SLBI |
| Apium nodiflorum | GB, VC23 Oxfordshire, Oxford, Port Meadow | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 13/8/1935 | SLBI |
| Apium repens | GB, VC23 Oxfordshire, Oxford, Port Meadow | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 13/8/1935 | SLBI |
| Carex canescens | GB, VC49 Caernarvonshire, Llanberis | John Frederick Gustav Chapple | John Frederick Gustav Chapple Patrick Martin Hall | 13/6/1937 | BM |
| Carex canescens | GB, VC45 Pembrokeshire, Llanbed Farm | John Frederick Gustav Chapple | Patrick Martin Hall | 1/7/1939 | BM |
| Lamium purpureum var. hybridum | GB, VC23 Oxfordshire, Oxford | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles | 30/5/1934 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC23 Oxfordshire, Oxford | John Frederick Gustav Chapple | John Frederick Gustav Chapple | 20/8/1937 | K |
| Mentha spicata x longifolia = M. x villosonervata | GB, VC23 Oxfordshire, Oxford | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 20/8/1937 | K |
| Mentha suaveolens | GB, VC3 South Devon, Start Point | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 12/8/1936 | K |
| Myosotis sylvatica | GB, VC23 Oxfordshire, Henley on Thames | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 6/1936 | SLBI |
| Myosotis sylvatica | GB, VC23 Oxfordshire, Henley | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 6/1936 | SLBI |
+ | Myriophyllum verticillatum | GB, VC22 Berkshire, Radley | John Frederick Gustav Chapple | Botanical Society & Exchange Club of The British Isles John Frederick Gustav Chapple | 3/8/1935 | MANCH |
| Petroselinum segetum | GB, VC23 Oxfordshire, Oxford, Port Meadow | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles London Natural History Society | 14/8/1934 | SLBI |
| Petroselinum segetum | GB, VC23 Oxfordshire, Oxford,Port Meadow | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles | 14/8/1934 | SLBI |
| Potamogeton gramineus | GB, VC55 Leicestershire, Cropston Reservoir | John Frederick Gustav Chapple | | 29/8/1936 | SLBI |
| Potamogeton nodosus | GB, VC22 Berkshire, River Thames at Cookham | John Frederick Gustav Chapple | | 25/8/1937 | BIRM |
| Spergularia rubra | GB, VC3 South Devon, Torcross | John Frederick Gustav Chapple | Botanical Exchange Club of The British Isles John Frederick Gustav Chapple | 14/8/1936 | SLBI |
| Stratiotes aloides | GB, VC17 Surrey, Dulwich | Isaac A Helsby John Frederick Gustav Chapple | | 17/7/1928 | SLBI |