| Asplenium marinum | GB, VC34 West Gloucestershire, Shirehampton | Gustavus A Ornano St Brody | | 1856 | GLR |
| Asplenium obovatum | GB, VC34 West Gloucestershire, Oldbury | Gustavus A Ornano St Brody | | 7/1869 | GLR |
| Asplenium ruta-muraria | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 9/1864 | GLR |
| Asplenium trichomanes | GB, VC34 West Gloucestershire, Lancaut | Gustavus A Ornano St Brody | | 9/1864 | GLR |
| Astragalus danicus | GB, VC33 East Gloucestershire, Crickley Hill | Gustavus A Ornano St Brody | British Botanical Competition | 6/1864 | GLR |
| Astragalus glycyphyllos | GB, VC34 West Gloucestershire, Cleeve Wood | Gustavus A Ornano St Brody | Gustavus A Ornano St Brody | 6/1866 | GLR |
| Athyrium filix-femina | GB, VC33 East Gloucestershire, Cranham | Gustavus A Ornano St Brody | British Botanical Competition | 9/1864 | GLR |
| Athyrium filix-femina | GB, VC33 East Gloucestershire, Painswick | Gustavus A Ornano St Brody | | 7/1867 | GLR |
| Athyrium filix-femina | GB, VC34 West Gloucestershire, Forest of Dean | Gustavus A Ornano St Brody | British Botanical Competition | 8/1864 | GLR |
| Atriplex glabriuscula | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | | 7/1865 | GLR |
| Atriplex glabriuscula | GB, VC34 West Gloucestershire, New Passage | Gustavus A Ornano St Brody | | 7/1866 | GLR |
| Atriplex patula | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 9/1864 | GLR |
| Atriplex patula | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | | 7/1864 | GLR |
| Atriplex patula | GB, VC34 West Gloucestershire, New Passage | Gustavus A Ornano St Brody | | 7/1864 | GLR |
| Atriplex portulacoides | GB, VC34 West Gloucestershire, Shirehampton | Gustavus A Ornano St Brody | | 7/1867 | GLR |
| Atriplex prostrata | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 9/1864 | GLR |
| Atriplex prostrata | GB, VC34 West Gloucestershire, Lydney | Gustavus A Ornano St Brody | | 7/1865 | GLR |
| Barbarea intermedia | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | | 6/1865 | GLR |
| Barbarea verna | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 5/1865 | GLR |
| Barbarea vulgaris | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |
| Barbarea vulgaris | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | | 6/1866 | GLR |
| Beta vulgaris subsp. maritima | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 9/1865 | GLR |
| Blechnum spicant | GB, VC33 East Gloucestershire, Cranham | Gustavus A Ornano St Brody | British Botanical Competition | 8/1864 | GLR |
| Buxus sempervirens | GB, VC34 West Gloucestershire, Wotton Hill | Gustavus A Ornano St Brody | British Botanical Competition | 5/1863 | GLR |
| Cakile maritima | GB, VC34 West Gloucestershire, Beachley | Gustavus A Ornano St Brody | | 6/1863 | GLR |
| Caltha palustris var. guerangerii | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |
| Camelina microcarpa | GB, VC33 East Gloucestershire, Gloucester Docks | Gustavus A Ornano St Brody | | 7/1868 | GLR |
| Camelina sativa | GB, VC33 East Gloucestershire, Gloucester Docks | Gustavus A Ornano St Brody | | 7/1867 | GLR |
| Camelina sativa | GB, VC33 East Gloucestershire, Gloucester Docks | Gustavus A Ornano St Brody | | 7/1868 | GLR |
| Capsella bursa-pastoris | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | | 6/1864 | GLR |
| Cardamine amara | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 6/1864 | GLR |
| Cardamine amara | GB, VC34 West Gloucestershire, Berkeley | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |
| Cardamine flexuosa | GB, VC34 West Gloucestershire, Newent | Gustavus A Ornano St Brody | | 6/1866 | GLR |
| Cardamine hirsuta | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | Gustavus A Ornano St Brody | 5/1864 | GLR |
| Cardamine impatiens | GB, VC34 West Gloucestershire, Mitcheldean | Gustavus A Ornano St Brody | British Botanical Competition | 7/1864 | GLR |
| Cardamine pratensis | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 6/1864 | GLR |
| Cerastium arvense | GB, VC34 West Gloucestershire, Sedbury | Gustavus A Ornano St Brody | | 6/1873 | GLR |
| Cerastium atrovirens | GB, VC34 West Gloucestershire, Saint Vincent's Rocks | Gustavus A Ornano St Brody | | 7/1869 | GLR |
| Cerastium fontanum subsp. holosteoides | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |
| Cerastium glomeratum | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |