| Achillea millefolium | GB, VC17,VC21, London | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1875 | MANCH |
| Achillea ptarmica | GB, VC16 West Kent, Keston | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1890 | MANCH |
| Achillea ptarmica | GB, VC21 Middlesex, Harrow Weald | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1882 | MANCH |
| Achillea ptarmica | GB, VC21 Middlesex, Harrow Weald Common | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1882 | MANCH |
| Adoxa moschatellina | GB, VC21 Middlesex, Neasdon | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1878 | MANCH |
| Adoxa moschatellina | GB, VC21 Middlesex, Neasdon | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 12/6/1882 | MANCH |
+ | Agrostemma githago | GB, VC16 West Kent, Beckenham | Eyre Champion de Crespigny | Charles Bailey Eyre de Crespigny | 1892 | MANCH |
+ | Agrostemma githago | GB, VC17 Surrey | Eyre Champion de Crespigny | Charles Bailey Eyre de Crespigny | 1879 | MANCH |
+ | Agrostemma githago | GB, VC17 Surrey, Surrey (17) | Eyre Champion de Crespigny | | 1879 | NMW |
| Agrostis stolonifera x Polypogon monspeliensis = x Agropogon littoralis | | Eyre Champion de Crespigny | George Stephen West William West | | BIRM |
| Agrostis stolonifera x Polypogon monspeliensis = x Agropogon littoralis | GB, VC18 South Essex, Canvey Island | Eyre Champion de Crespigny | London Botanical Exchange Club Robert Large Baker | 7/1877 | BIRM |
| Agrostis stolonifera x Polypogon monspeliensis = x Agropogon littoralis | GB, VC18 South Essex, Canvey Island | Eyre Champion de Crespigny | Charles Bailey | 7/1879 | MANCH |
| Agrostis stolonifera x Polypogon monspeliensis = x Agropogon littoralis | GB, VC18 South Essex, Canvey Island | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1883 | MANCH |
| Agrostis stolonifera x Polypogon monspeliensis = x Agropogon littoralis | GB, VC18 South Essex, Canvey Island | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1888 | MANCH |
| Agrostis stolonifera x Polypogon monspeliensis = x Agropogon littoralis | GB, VC18 South Essex, Canvey Island | Eyre Champion de Crespigny | Charles Bailey John Wilson Rimington Spencer Henry Bickham | 7/1877 | MANCH |
| Agrostis stolonifera x Polypogon monspeliensis = x Agropogon littoralis | GB, VC18 South Essex, Canvey Island | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1878 | MANCH |
| Aira caryophyllea | GB, VC16 West Kent, Keston Common | Eyre Champion de Crespigny | | 1884 | ABS |
+ | Ajuga chamaepitys | GB, VC17 Surrey, Banstead Downs | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny Eyre de Crespigny | 1883 | MANCH |
+ | Ajuga chamaepitys | GB, VC17 Surrey, Banstead Downs | Eyre Champion de Crespigny | Charles Bailey | 1882 | MANCH |
+ | Ajuga chamaepitys | GB, VC17 Surrey, Banstead Downs | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny Eyre de Crespigny | 1882 | MANCH |
+ | Ajuga chamaepitys | GB, VC17 Surrey, Dorking,Box Hill | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny Eyre de Crespigny | 7/1886 | MANCH |
| Alisma plantago-aquatica | GB, VC17 Surrey, Barnes | Eyre Champion de Crespigny | | 1879 | MANCH |
| Alnus glutinosa | | Eyre Champion de Crespigny | Charles Bailey | | BIRM |
+ | Althaea hirsuta | GB, VC34 West Gloucestershire, Bristol,Pur Down | Eyre Champion de Crespigny | Eyre Champion de Crespigny | 7/1878 | MANCH |
+ | Anagallis minima | GB, VC17 Surrey, Bagshot Heath | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1876 | MANCH |
+ | Anagallis minima | GB, VC17 Surrey, Bagshot Heath | | Charles Bailey Eyre Champion de Crespigny | 1876 | MANCH |
| Anemone apennina | GB, VC3 South Devon, Exeter | | Charles Bailey Eyre Champion de Crespigny F C King | 4/1885 | MANCH |
| Anemone apennina | GB, VC16 West Kent, Beckenham Cultivated | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1894 | MANCH |
| Anemone apennina | GB, VC17 Surrey | Eyre Champion de Crespigny | Charles Bailey | | MANCH |
| Anemone nemorosa | GB, VC21 Middlesex, Hampstead Heath | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1873 | MANCH |
| Anemone nemorosa | GB, VC21 Middlesex, London | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1883 | MANCH |
| Anemone nemorosa | GB, VC21 Middlesex, Pinner | Eyre Champion de Crespigny | Eyre Champion de Crespigny | 1873 | MANCH |
| Anthemis arvensis | GB, VC20 Hertfordshire, Hitchin | Eyre Champion de Crespigny | George Stephen West | 6/1876 | BIRM |
+ | Anthemis cotula | GB, VC17 Surrey, Aldershot,Ash | Eyre Champion de Crespigny | Charles Bailey | 1879 | MANCH |
+ | Anthemis cotula | GB, VC17 Surrey, Aldershot,Ash | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1878 | MANCH |
+ | Anthemis cotula | GB, VC17 Surrey, Guildford (Sw of),Puttenham | Eyre Champion de Crespigny | Charles Bailey | 7/1879 | MANCH |
+ | Anthemis cotula | GB, VC17 Surrey, Guildford (Sw of),Puttenham | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny | 1877 | MANCH |
| Anthyllis vulneraria | GB, VC17 Surrey, Croydon | Eyre Champion de Crespigny | Eyre Champion de Crespigny Charles Bailey | 7/1886 | BIRM |
+ | Apera spica-venti | GB, VC17 Surrey, Hersham | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny Eyre de Crespigny | 1883 | MANCH |
+ | Apera spica-venti | GB, VC17 Surrey, Hersham | Eyre Champion de Crespigny | Charles Bailey Eyre Champion de Crespigny Eyre de Crespigny | 1886 | MANCH |