| Achillea millefolium | GB, VC55 Leicestershire, Somerby | J Headley Neale | Charles Bailey Frederick Thompson Mott J Headley Neale Thomas Thorp | 8/1880 | MANCH |
| Achillea ptarmica | GB, VC55 Leicestershire, Charnwood Forest | | Charles Bailey Frederick Thompson Mott Thomas Thorp | | MANCH |
| Achillea ptarmica | GB, VC38,VC55, Burbage | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 20/7/1881 | MANCH |
| Aconitum napellus | GB, VC62 North-east Yorkshire, Scarborough,Forge Valley | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 7/1842 | MANCH |
| Adoxa moschatellina | GB, VC55 Leicestershire, Buddon Wood | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 5/1872 | MANCH |
| Adoxa moschatellina | GB, VC55 Leicestershire, Gracedieu | Frederick Thompson Mott | Manchester Museum Charles Bailey Frederick Thompson Mott Thomas Thorp | 6/4/1876 | MANCH |
| Adoxa moschatellina | GB, VC55 Leicestershire, Leicester | | Manchester Museum Charles Bailey Frederick Thompson Mott Thomas Thorp | 1842 | MANCH |
| Adoxa moschatellina | GB, VC55 Leicestershire, Tilton on the-Hill | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 14/5/1883 | MANCH |
| Adoxa moschatellina | GB, VC55 Leicestershire, Tilton on the-Hill | G Robson | Charles Bailey Frederick Thompson Mott Thomas Thorp | 3/1880 | MANCH |
| Adoxa moschatellina | GB, VC55 Leicestershire, Ulverscroft | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 25/5/1873 | MANCH |
| Adoxa moschatellina | GB, VC66 County Durham, Rowlands Gill | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 5/1874 | MANCH |
+ | Ajuga chamaepitys | GB, VC17 Surrey, Addington | William Hadden Beeby | Charles Bailey Frederick Thompson Mott Thomas Thorp | 29/5/1871 | MANCH |
| Alisma lanceolatum | GB, VC55 Leicestershire, Aylestone | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 19/9/1883 | MANCH |
| Alisma lanceolatum | GB, VC55 Leicestershire, Groby Pool | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 4/7/1883 | MANCH |
| Alisma plantago-aquatica | GB, VC55 Leicestershire, Groby Pool | | Charles Bailey Frederick Thompson Mott Thomas Thorp | | MANCH |
| Alisma plantago-aquatica | GB, VC55 Leicestershire, Hungerton | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 16/9/1898 | MANCH |
| Alisma plantago-aquatica | GB, VC55 Leicestershire, River Soar | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 7/1843 | MANCH |
| Alisma plantago-aquatica | GB, VC55 Leicestershire, Turnwater Meadow | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 8/1881 | MANCH |
+ | Allium sphaerocephalon | GB, VC113 Channel Islands, Jersey,Le Marais | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 8/1895 | MANCH |
| Anemone apennina | GB, VC3 South Devon, Kingsbridge | J Norris | Charles Bailey Frederick Thompson Mott Thomas Thorp | 3/1890 | MANCH |
| Anemone apennina | GB, VC55 Leicestershire, Belvoir Castle Cultivated | P T Ingram | Charles Bailey Frederick Thompson Mott Thomas Thorp | 1/1888 | MANCH |
| Anemone apennina | GB, VC55 Leicestershire, Belvoir Castle Cultivated | P T Ingram | Charles Bailey Frederick Thompson Mott Thomas Thorp | 1/1888 | MANCH |
| Anemone apennina | GB, VC55 Leicestershire, Birstall | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 4/1892 | MANCH |
| Anemone nemorosa | GB, VC55 Leicestershire, Groby | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 26/4/1874 | MANCH |
| Anemone nemorosa | GB, VC55 Leicestershire, Holly Hayes Wood, Whitwick | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 6/4/1876 | MANCH |
| Anemone nemorosa | GB, VC55 Leicestershire, Woodhouse | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 5/5/1876 | MANCH |
| Antennaria dioica | GB, VC86 Stirlingshire, Glen Arklet | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 7/1849 | MANCH |
| Antennaria dioica | GB, VC90 Angus, Clova | Alexander Baines | Charles Bailey Frederick Thompson Mott Thomas Thorp | 7/1873 | MANCH |
+ | Anthemis arvensis | GB, VC55 Leicestershire, Leicester | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 11/10/1875 | MANCH |
+ | Anthemis arvensis | GB, VC55 Leicestershire, Leicester | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 10/6/1885 | MANCH |
+ | Anthemis cotula | GB, VC13 West Sussex | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 8/1872 | MANCH |
+ | Anthemis cotula | GB, VC55 Leicestershire, Burbage | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 7/1886 | MANCH |
+ | Anthemis cotula | GB, VC55 Leicestershire, Burbage | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 7/1892 | MANCH |
+ | Anthemis cotula | GB, VC55 Leicestershire, Kilworth | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 15/9/1875 | MANCH |
+ | Anthemis cotula | GB, VC55 Leicestershire, Tugby | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 2/8/1878 | MANCH |
| Apium nodiflorum x inundatum = A. x moorei | GB | Balfour | Charles Bailey Frederick Thompson Mott Thomas Thorp | | MANCH |
+ | Arnoseris minima | GB, VC24 Buckinghamshire, Brickhill | J Saunders | Charles Bailey Frederick Thompson Mott Thomas Thorp | 29/7/1889 | MANCH |
+ | Baldellia ranunculoides | GB, VC41 Glamorganshire, Swansea | R Brewin | Charles Bailey Frederick Thompson Mott Thomas Thorp | 7/1843 | MANCH |
+ | Bupleurum rotundifolium | GB, VC55 Leicestershire, Bristol Hill | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 7/1902 | MANCH |
+ | Bupleurum rotundifolium | GB, VC55 Leicestershire, Bristol Hill | | Charles Bailey Frederick Thompson Mott Thomas Thorp | 6/1905 | MANCH |