| Anagallis arvensis subsp. foemina | GB, VC55 Leicestershire, Turnpole | Richard Charles L'Estrange Burges | | 1/8/1937 | BIRM |
| Anagallis minima | GB, VC11 South Hampshire, Sowley Pond | Richard Charles L'Estrange Burges | | 18/8/1937 | BIRM |
| Anagallis tenella | GB, VC9 Dorset, Studland | Richard Charles L'Estrange Burges | | 8/1938 | BIRM |
| Anagallis tenella | GB, VC48 Merionethshire, Merioneth | Richard Charles L'Estrange Burges | | 8/1923 | BIRM |
| Anaphalis margaritacea | GB, VC41 Glamorganshire, Port Talbot | Richard Charles L'Estrange Burges | | 23/7/1933 | BIRM |
| Anemone nemorosa | GB, VC8 South Wiltshire, Grovely Wood | Richard Charles L'Estrange Burges | | 4/1940 | BIRM |
| Anemone nemorosa | GB, VC37 Worcestershire, Chaddesley Corbett | Richard Charles L'Estrange Burges | | 7/4/1935 | BIRM |
| Anemone nemorosa | GB, VC40 Shropshire, Bowhills Dingle | Richard Charles L'Estrange Burges | | 6/5/1937 | BIRM |
| Anemone nemorosa | GB, VC56 Nottinghamshire, Gamston | Richard Charles L'Estrange Burges | | 10/4/1915 | BIRM |
| Anethum graveolens | GB, VC39 Staffordshire, Burton on Trent | Richard Charles L'Estrange Burges | | 20/8/1936 | BIRM |
| Angelica archangelica | GB, VC17 Surrey, Barnes Bridge | Richard Charles L'Estrange Burges | | 4/7/1942 | BIRM |
| Angelica archangelica | GB, VC17 Surrey, Barnes Bridge | Richard Charles L'Estrange Burges | | 4/7/1942 | BIRM |
| Angelica archangelica | GB, VC17 Surrey, Barnes Bridge | Richard Charles L'Estrange Burges | | 4/7/1942 | BIRM |
| Angelica sylvestris | GB, VC39 Staffordshire, Lichfield | Richard Charles L'Estrange Burges | | 10/9/1930 | BIRM |
| Angelica sylvestris | GB, VC40 Shropshire, Whixall | Richard Charles L'Estrange Burges | | 30/8/1936 | BIRM |
| Antennaria dioica | GB, VC66 County Durham, Wynch Bridge | Richard Charles L'Estrange Burges | | 23/6/1934 | BIRM |
| Antennaria dioica | GB, VC88 Mid Perthshire, Sow of Atholl | Richard Charles L'Estrange Burges | | 20/6/1936 | BIRM |
| Antennaria dioica | GB, VC97 West Inverness-shire, Arisaig | Richard Charles L'Estrange Burges | | 17/8/1930 | BIRM |
| Antennaria dioica | GB, VC109 Caithness, Links of Dunnet | Richard Charles L'Estrange Burges | | 1/7/1946 | BIRM |
| Anthriscus caucalis | GB, VC39 Staffordshire, Whittington Common | Richard Charles L'Estrange Burges | | 22/5/1933 | BIRM |
| Anthriscus cerefolium | GB, VC36 Herefordshire, Ross on Wye | Richard Charles L'Estrange Burges | | 17/4/1938 | BIRM |
| Anthriscus cerefolium | GB, VC36 Herefordshire, Ross on Wye | Richard Charles L'Estrange Burges | | 17/4/1938 | BIRM |
| Anthriscus cerefolium | GB, VC36 Herefordshire, Ross on Wye | Richard Charles L'Estrange Burges | | 17/4/1938 | BIRM |
| Anthriscus sylvestris | GB, VC39 Staffordshire, Hamstead | Richard Charles L'Estrange Burges | | 23/5/1935 | BIRM |
| Anthriscus sylvestris | GB, VC39 Staffordshire, Hamstead | Richard Charles L'Estrange Burges | | 23/5/1935 | BIRM |
| Anthriscus sylvestris | GB, VC39 Staffordshire, Hamstead | Richard Charles L'Estrange Burges | | 23/5/1935 | BIRM |
| Anthriscus sylvestris | GB, VC56 Nottinghamshire, Drayton | Richard Charles L'Estrange Burges | | 25/4/1915 | BIRM |
| Anthriscus vulgaris | GB, VC3 South Devon, Berry Head | Richard Charles L'Estrange Burges | | 28/5/1941 | BIRM |
| Anthriscus vulgaris | GB, VC28 West Norfolk, Eriswell | Richard Charles L'Estrange Burges | | 10/5/1937 | BIRM |
| Anthriscus vulgaris | GB, VC37 Worcestershire, Habberley Valley | Richard Charles L'Estrange Burges | | 25/5/1936 | BIRM |
| Apium graveolens | GB, VC28 West Norfolk, Burnham | Richard Charles L'Estrange Burges | | 27/7/1931 | BIRM |
| Apium graveolens | GB, VC37 Worcestershire, Droitwich | Richard Charles L'Estrange Burges | | 2/7/1933 | BIRM |
| Apium graveolens | GB, VC37 Worcestershire, Droitwich | Richard Charles L'Estrange Burges | | 8/1942 | BIRM |
| Apium graveolens | GB, VC37 Worcestershire, Droitwich | Richard Charles L'Estrange Burges | | 24/8/1948 | BIRM |
| Apium inundatum | GB, VC11 South Hampshire, Crockford Bridge | Richard Charles L'Estrange Burges | | 29/6/1949 | BIRM |
| Apium inundatum | GB, VC62 North-east Yorkshire, Gormire | Richard Charles L'Estrange Burges | | 17/6/1935 | BIRM |
| Apium inundatum | IE, VCH24,VCH25, Lanesborough | Richard Charles L'Estrange Burges | | 18/6/1937 | BIRM |
| Apium inundatum | IE, VCH24 Co. Longford, Lanesborough | Richard Charles L'Estrange Burges | | 18/6/1937 | BIRM |
| Apium nodiflorum | GB, VC11 South Hampshire, Breamore | Richard Charles L'Estrange Burges | | 5/9/1937 | BIRM |
| Apium nodiflorum | GB, VC23 Oxfordshire, Oxford, Port Meadow | Richard Charles L'Estrange Burges | | 12/8/1939 | BIRM |