| Ammi majus | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | Allan Octavian Hume Frederick Townsend | 1869 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC34 West Gloucestershire, Longhope | Gustavus A Ornano St Brody | Druce Herbarium, Oxford Frederic Stratton | 1869 | OXF |
+ | Misopates orontium | GB, VC16 West Kent | Gustavus A Ornano St Brody | Charles Bailey | 7/1891 | MANCH |
+ | Misopates orontium | GB, VC16 West Kent, Snodland | Gustavus A Ornano St Brody | Charles Bailey | 7/1891 | MANCH |
+ | Onobrychis viciifolia | GB, VC15 East Kent, Maidstone (near),Maidstone | Gustavus A Ornano St Brody | Charles Bailey | 7/1891 | MANCH |
+ | Ophrys insectifera | GB, VC16 West Kent, Cuxton Woods | Gustavus A Ornano St Brody | Gustavus A Ornano St Brody | 6/1892 | MANCH |
+ | Ophrys sphegodes | GB, VC15 East Kent, Gillingham,Rainham | Gustavus A Ornano St Brody | Gustavus A Ornano St Brody | 5/1892 | MANCH |
+ | Orchis anthropophora | GB, VC15 East Kent, Maidstone | Gustavus A Ornano St Brody | Gustavus A Ornano St Brody | 6/1892 | MANCH |
+ | Orchis militaris | GB, VC15 East Kent | Gustavus A Ornano St Brody | Gustavus A Ornano St Brody | 6/1892 | MANCH |
+ | Orchis purpurea | GB, VC15 East Kent | Gustavus A Ornano St Brody | Gustavus A Ornano St Brody | 6/1892 | MANCH |
| Acer campestre | GB, VC34 West Gloucestershire, Flaxley | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |
| Acer pseudoplatanus | GB, VC34 West Gloucestershire, Flaxley | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |
| Aconitum napellus | GB, VC33 East Gloucestershire, Hucclecote | Gustavus A Ornano St Brody | British Botanical Competition | 7/1864 | GLR |
| Adonis autumnalis | GB, VC33 East Gloucestershire, Painswick | Gustavus A Ornano St Brody | | 7/1869 | GLR |
| Agrimonia eupatoria | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 8/1864 | GLR |
| Agrostemma githago | GB, VC34 West Gloucestershire, Over | Gustavus A Ornano St Brody | | 8/1864 | GLR |
| Alchemilla vulgaris agg | GB, VC33 East Gloucestershire, Cranham | Gustavus A Ornano St Brody | British Botanical Competition | 4/1864 | GLR |
| Alchemilla vulgaris agg | GB, VC33 East Gloucestershire, Glenfall | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |
| Alchemilla vulgaris agg | GB, VC33 East Gloucestershire, Whitcomb | Gustavus A Ornano St Brody | British Botanical Competition | 4/1864 | GLR |
| Alliaria petiolata | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 6/1864 | GLR |
| Althaea officinalis | GB, VC34 West Gloucestershire, New Passage | Gustavus A Ornano St Brody | | 8/1866 | GLR |
| Alyssum alyssoides | GB, VC33 East Gloucestershire, Gloucester Docks | Gustavus A Ornano St Brody | | 7/1868 | GLR |
| Alyssum alyssoides | GB, VC33 East Gloucestershire, Stonehouse | Gustavus A Ornano St Brody | | 5/1865 | GLR |
| Amaranthus retroflexus | GB, VC33 East Gloucestershire, Tuffley | Gustavus A Ornano St Brody | | 6/1865 | GLR |
| Anemone apennina | GB, VC33 East Gloucestershire, Whitcomb | Gustavus A Ornano St Brody | British Botanical Competition | 6/1864 | GLR |
| Anemone nemorosa | GB, VC33 East Gloucestershire, Witcombe Wood | Gustavus A Ornano St Brody | British Botanical Competition | 5/1864 | GLR |
| Anemone ranunculoides | GB, VC33 East Gloucestershire, Haresfield | Gustavus A Ornano St Brody | | 6/1868 | GLR |
| Anthyllis vulneraria | GB, VC33 East Gloucestershire, Painswick Hill | Gustavus A Ornano St Brody | British Botanical Competition | 6/1864 | GLR |
| Aphanes arvensis | GB, VC33 East Gloucestershire, Prestbury | Gustavus A Ornano St Brody | British Botanical Competition | 8/1864 | GLR |
| Arabidopsis thaliana | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 6/1864 | GLR |
| Arabis glabra | GB, VC34 West Gloucestershire, Saint Vincent's Rocks | Gustavus A Ornano St Brody | | 1854 | GLR |
| Arabis hirsuta | GB, VC33 East Gloucestershire, Leckhampton | Gustavus A Ornano St Brody | British Botanical Competition | 6/1864 | GLR |
| Arabis hirsuta | GB, VC34 West Gloucestershire, Frampton | Gustavus A Ornano St Brody | | 5/1865 | GLR |
| Arabis scabra | GB, VC34 West Gloucestershire, Saint Vincent's Rocks | Gustavus A Ornano St Brody | | 5/1864 | GLR |
| Arenaria serpyllifolia | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 8/1864 | GLR |
| Arenaria serpyllifolia subsp. leptoclados | GB, VC33 East Gloucestershire, Frith Wood | Gustavus A Ornano St Brody | | 8/1863 | GLR |
| Armoracia rusticana | GB, VC33 East Gloucestershire, Gloucester | Gustavus A Ornano St Brody | British Botanical Competition | 9/1865 | GLR |
| Asplenium adiantum-nigrum | GB, VC34 West Gloucestershire, Lancaut | Gustavus A Ornano St Brody | Gustavus A Ornano St Brody | 9/1864 | GLR |
| 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 |