| Orchis purpurea | GB, VC15 East Kent, Dover | Eyre Champion de Crespigny | Augustin Ley | 6/1876 | BIRM |
| Origanum vulgare | GB, VC17 Surrey, Sanderstead | Eyre Champion de Crespigny | William Hunt Painter | 7/1887 | SHYB |
| Papaver somniferum subsp. setigerum | GB, VC16 West Kent, Greenhithe | Eyre Champion de Crespigny | Augustin Ley | 7/1877 | BIRM |
| Papaver somniferum subsp. setigerum | GB, VC17 Surrey, Mickleham | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles Augustin Ley | 1883 | BIRM |
| Papaver somniferum subsp. setigerum | GB, VC17 Surrey, Mickleham | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles Augustin Ley | 7/1879 1881 | BIRM |
| Papaver somniferum subsp. setigerum | GB, VC17 Surrey, Mickleham | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles George Stephen West | 7/1879 | BIRM |
| Peucedanum officinale | GB, VC15 East Kent, Faversham | Eyre Champion de Crespigny | William Hunt Painter | 8/1882 to 1883 | ABS |
| Peucedanum officinale | GB, VC15 East Kent, Faversham | Eyre Champion de Crespigny | George Stephen West | 8/1877 | BIRM |
| Phleum arenarium | GB, VC18 South Essex, Southend | Eyre Champion de Crespigny | Arthur Waters Preston William Hunt Painter | 1876 | ABS |
| Phyteuma orbiculare | GB, VC17 Surrey, Warlingham | Eyre Champion de Crespigny | | | MANCH |
| Plantago arenaria | GB, VC16 West Kent, Beckenham | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles Augustin Ley | 1888 | BIRM |
| Poa compressa | GB, VC16 West Kent, Beckenham | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles Augustin Ley | 1888 | BIRM |
| Polygala vulgaris subsp. collina | GB, VC17 Surrey, Reigate Heath | Eyre Champion de Crespigny | William Hadden Beeby | 1882 | SLBI |
| Potamogeton natans | GB, VC22 Berkshire, Upton | Eyre Champion de Crespigny | Chenevix-Trench | 1893 | MANCH |
| Puccinellia distans | GB, VC14 East Sussex, Saint Leonards | Eyre Champion de Crespigny | William Hunt Painter | 8/1886 | ABS |
| Pulicaria vulgaris | GB, VC17 Surrey, Ditton Marsh | Eyre Champion de Crespigny | George Stephen West | 8/1875 | BIRM |
| Pulsatilla vulgaris | GB, VC20 Hertfordshire, Aldbury Nowers | Eyre Champion de Crespigny | | 1882 | BIRM |
+ | Radiola linoides | GB, VC17 Surrey, Reigate Heath | Eyre Champion de Crespigny | Eyre Champion de Crespigny Eyre de Crespigny | 1876 | MANCH |
| Ranunculus acris | GB, VC18 South Essex, Tilbury | Eyre Champion de Crespigny | | 1890 | MANCH |
| Ranunculus acris | GB, VC18 South Essex, Tilbury | Eyre Champion de Crespigny | Eyre Champion de Crespigny | 1890 | MANCH |
| Ranunculus penicillatus subsp. pseudofluitans | GB, VC20 Hertfordshire, Rickmansworth | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles William Hunt Painter | 6/1881 | ABS |
| Ranunculus sardous | GB, VC16 West Kent, Erith | Eyre Champion de Crespigny | Eyre Champion de Crespigny | 1890 | MANCH |
| Ranunculus sardous | GB, VC18 South Essex, Canvey Island | Eyre Champion de Crespigny | | 1883 | MANCH |
| Ranunculus sardous | GB, VC18 South Essex, Tilbury | Eyre Champion de Crespigny | | 1876 | MANCH |
| Reseda luteola | GB, VC14 East Sussex, Falmer | Eyre Champion de Crespigny | George Stephen West | 9/1880 | BIRM |
| Rorippa nasturtium-aquaticum | GB, VC17 Surrey, Kew | Eyre Champion de Crespigny | | 1882 | MANCH |
| Rorippa nasturtium-aquaticum | GB, VC17 Surrey, Mortlake | Eyre Champion de Crespigny | | 1882 | MANCH |
| Rosa micrantha | GB, VC17 Surrey, Purley Downs | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles | 1887 | SLBI |
| Rubus flexuosus | GB, VC21 Middlesex, Harrow Weald | Eyre Champion de Crespigny | | 8/1879 | SLBI |
| Rubus maasii | GB, VC16 West Kent, Saint Paul's Cray Common | Eyre Champion de Crespigny | | 1887 | BSBI |
| Rubus macrophyllus | GB, VC21 Middlesex, Highgate | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles | 1882 | SLBI |
| Rubus macrophyllus | GB, VC21 Middlesex, Highgate | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles | 1882 | SLBI |
| Rubus pubescens | GB, VC16 West Kent, Chislehurst | Eyre Champion de Crespigny | | 1886 | BSBI |
| Rubus rhamnifolius | GB, VC16 West Kent, Hayes Common | Eyre Champion de Crespigny | | 1887 | BSBI |
| Rubus rusticanus | GB, VC16 West Kent, Saint Mary Cray | Eyre Champion de Crespigny | | 1887 | BSBI |
| Rubus sprengelii | GB, VC21 Middlesex, Hampstead Heath | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles | 1882 | SLBI |
| Rumex scutatus | GB, VC21 Middlesex, Sudbury | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles Augustin Ley | 8/1881 | BIRM |
| Sagina nodosa | GB, VC17 Surrey, Kew | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles Augustin Ley | 1882 | BIRM |
| Sagina nodosa | GB, VC17 Surrey, Kew GB, VC6 North Somerset, Weston-super-Mare | Eyre Champion de Crespigny | Botanical Exchange Club of The British Isles | 1882 | SLBI |
| Salix purpurea | GB, VC17 Surrey, Putney | Eyre Champion de Crespigny | | 7/1887 9/1887 | BSBI |