| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Kidderminster | Richard Charles L'Estrange Burges | Druce Herbarium, Oxford | 1936 | OXF |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC9 Dorset, Swanage | Richard Charles L'Estrange Burges | Druce Herbarium, Oxford | 1938 | OXF |
| Scirpus americanus | GB, VC113 Channel Islands, Jersey, Saint Ouen's | Louis Arsene | Botanical Exchange Club of The British Isles Louis Arsene Richard Charles L'Estrange Burges | 15/7/1926 | BIRM |
| Erodium botrys | GB, VC11 South Hampshire, Fareham | Richard Charles L'Estrange Burges | | 30/10/1939 | BIRM |
| Satureja montana | GB, VC11 South Hampshire, Beaulieu Abbey | John Patrick Micklethwait Brenan Norman Douglas Simpson Richard Charles L'Estrange Burges | John Patrick Micklethwait Brenan | 5/9/1938 | K |
| Galium spurium var. vaillantii | GB, VC39 Staffordshire, Burton on Trent | Richard Charles L'Estrange Burges | | 29/8/1936 | BIRM |
| Acanthus mollis | GB, VC45 Pembrokeshire, Lydstep | Richard Charles L'Estrange Burges | | 15/8/1936 | BIRM |
| Acer campestre | GB, VC40 Shropshire, Hartsgreen | Richard Charles L'Estrange Burges | | 21/4/1946 | BIRM |
| Acer campestre | GB, VC55 Leicestershire, Turnpole | Richard Charles L'Estrange Burges | | 1/6/1936 | BIRM |
| Aconitum anglicum | GB, VC40 Shropshire, Caynham | Richard Charles L'Estrange Burges | | 25/7/1937 | BIRM |
| Aconitum anglicum | GB, VC40 Shropshire, Caynham | Richard Charles L'Estrange Burges | | 25/7/1937 | BIRM |
| Actaea spicata | GB, VC62 North-east Yorkshire, Rievaulx | Richard Charles L'Estrange Burges | | 27/5/1950 | BIRM |
| Actaea spicata | GB, VC64 Mid-west Yorkshire, Selside | Richard Charles L'Estrange Burges | | 16/6/1935 | BIRM |
| Actaea spicata | GB, VC64 Mid-west Yorkshire, Selside | Richard Charles L'Estrange Burges | | 19/7/1947 | BIRM |
| Aegopodium podagraria | GB, VC39 Staffordshire, Handsworth | Richard Charles L'Estrange Burges | | 14/7/1951 | BIRM |
| Aegopodium podagraria | GB, VC37 Worcestershire, Malvern | Richard Charles L'Estrange Burges | | 9/6/1946 | BIRM |
| Aegopodium podagraria | GB, VC39 Staffordshire, Handsworth | Richard Charles L'Estrange Burges | | 14/7/1951 | BIRM |
| Aegopodium podagraria | GB, VC37 Worcestershire, Tutnall | Richard Charles L'Estrange Burges | | 10/7/1918 | BIRM |
| Aethusa cynapium | GB, VC8 South Wiltshire, Lark Hill | Richard Charles L'Estrange Burges | | 8/1940 | BIRM |
| Aethusa cynapium | GB, VC27 East Norfolk, Horning | Richard Charles L'Estrange Burges | | 27/8/1939 | BIRM |
| Aethusa cynapium subsp. agrestis | GB, VC9 Dorset, Studland | Richard Charles L'Estrange Burges | | 21/8/1938 | BIRM |
| Alliaria petiolata | GB, VC56 Nottinghamshire, West Drayton | Richard Charles L'Estrange Burges | | 20/4/1915 | BIRM |
| Amaranthus albus | GB, VC21 Middlesex, Northolt | Richard Charles L'Estrange Burges | | 27/9/1947 | BIRM |
| Amaranthus albus | GB, VC39 Staffordshire, Burton on Trent | Richard Charles L'Estrange Burges | | 6/9/1935 | BIRM |
| Amaranthus chlorostachys | GB, VC18 South Essex, Barking | Richard Charles L'Estrange Burges | | 3/10/1952 | BIRM |
| Amaranthus chlorostachys | GB, VC37 Worcestershire, Evesham | Richard Charles L'Estrange Burges | | 10/1955 | BIRM |
| Amaranthus hybridus | GB, VC28 West Norfolk, Houghton | Richard Charles L'Estrange Burges | | 24/9/1950 | BIRM |
| Amaranthus retroflexus | GB, VC113 Channel Islands, La Porte l'Etacq, Jersey | Richard Charles L'Estrange Burges | | 2/9/1948 | BIRM |
| Amaranthus retroflexus | GB, VC28 West Norfolk, Houghton | Richard Charles L'Estrange Burges | | 24/9/1950 | BIRM |
| Amaranthus thunbergii | GB, VC37 Worcestershire, Charlton | Richard Charles L'Estrange Burges | | 10/1953 | BIRM |
| Ammi majus | GB, VC39 Staffordshire, Burton on Trent | Richard Charles L'Estrange Burges | | 10/1938 | BIRM |
| Ammi majus | GB, VC37 Worcestershire, Charlton | Richard Charles L'Estrange Burges | | 11/10/1953 | BIRM |
| Ammi majus | GB, VC30 Bedfordshire, Luton | Richard Charles L'Estrange Burges | | 4/10/1953 | BIRM |
| Ammi majus var. glaucifolium | GB, VC39 Staffordshire, Burton on Trent | Richard Charles L'Estrange Burges | | 10/1938 | BIRM |
| Ammi majus | GB, VC30 Bedfordshire, Luton | Richard Charles L'Estrange Burges | | 4/10/1953 | BIRM |
| Ammi visnaga | GB, VC39 Staffordshire, Burton on Trent | Richard Charles L'Estrange Burges | | 29/8/1936 | BIRM |
| Ammi visnaga | GB, VC39 Staffordshire, Burton on Trent | Richard Charles L'Estrange Burges | | 29/8/1936 | BIRM |
| Anagallis arvensis var. phoenicea | GB, VC39 Staffordshire, Handsworth | Richard Charles L'Estrange Burges | | 8/1947 | BIRM |
| Anagallis arvensis var. phoenicea | GB, VC39 Staffordshire, Burton on Trent | Richard Charles L'Estrange Burges | | 24/9/1949 | BIRM |
| Anagallis arvensis var. carnea | GB, VC3 South Devon, Berry Head | Richard Charles L'Estrange Burges | | 17/6/1945 | BIRM |