| Carex canescens | GB, VC92 South Aberdeenshire, Loch Euchan | Norman Douglas Simpson | Norman Douglas Simpson | 6/8/1955 | BM |
| Carex hirta x vesicaria = C. x grossii | IE, VCH20 Co. Wicklow, Magherabeg Cultivated | Arthur Wilson Stelfox | Norman Douglas Simpson | 12/6/1955 | BM |
+ | Impatiens glandulifera | GB, VC95 Moray, River Spey, shingles, Garmouth, Elgin | Norman Douglas Simpson | | 3/7/1953 | BM |
+ | Impatiens glandulifera | GB, VC95 Moray, River Spey, shingles, Garmouth, Elgin | Norman Douglas Simpson | | 3/7/1953 | BM |
| Carex riparia | IE, VCH1 South Kerry, Derrynane | Norman Douglas Simpson | Norman Douglas Simpson | 18/6/1952 | BM |
| Carex dioica | GB, VC38 Warwickshire, Sutton Park | Norman Douglas Simpson | Norman Douglas Simpson | 26/5/1949 | BM |
| Carex canescens | GB, VC96 East Inverness-shire, Tom a Choinich | Norman Douglas Simpson | Norman Douglas Simpson | 18/7/1947 | BM |
| Carex ovalis | GB, VC72 Dumfriesshire, Dumfries | Arthur Hugh Garfit Alston Norman Douglas Simpson | Norman Douglas Simpson | 30/6/1946 | BM |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC11 South Hampshire, Holmsley Bog | Job Edward Lousley Norman Douglas Simpson | Job Edward Lousley | 15/9/1945 | BM |
| Carex hirta | GB, VC54 North Lincolnshire, Toynton All Saints | Arthur Hugh Garfit Alston Norman Douglas Simpson | | 8/8/1945 | BM |
| Carex hirta | GB, VC54 North Lincolnshire, Woodhall Spa | Norman Douglas Simpson | Norman Douglas Simpson | 6/8/1945 | BM |
+ | Impatiens glandulifera | GB, VC53 South Lincolnshire, Timber yard on rubble bank; outcast. Skirbeck | Arthur Hugh Garfit Alston Norman Douglas Simpson | | 5/8/1945 | BM |
+ | Impatiens glandulifera | GB, VC54 North Lincolnshire, Garden outcast, Skirbeck Road, Boston. 3 clumps in a lane | Arthur Hugh Garfit Alston Norman Douglas Simpson | | 5/8/1945 | BM |
| Carex hirta | GB, VC53 South Lincolnshire, Rauceby | Arthur Hugh Garfit Alston Norman Douglas Simpson | | 2/8/1945 | BM |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC11 South Hampshire, Holmsley Station | Norman Douglas Simpson | Norman Douglas Simpson | 18/6/1945 15/9/1945 | BM |
| Carex muricata | GB, VC11 South Hampshire, Pokesdown | Norman Douglas Simpson | Norman Douglas Simpson | 3/6/1945 | E |
| Hypochaeris glabra | GB, VC9 Dorset, Sandford | John Patrick Micklethwait Brenan Norman Douglas Simpson | John Patrick Micklethwait Brenan | 28/6/1942 | K |
+ | Impatiens glandulifera | GB, VC17 Surrey, Bank of Thames, D.S Richmond | Norman Douglas Simpson | | 25/8/1941 | BM |
| Carex ovalis | GB, VC17 Surrey, Peasmarsh | Noel Yvri Sandwith Norman Douglas Simpson | Norman Douglas Simpson | 22/7/1941 | BM |
| Rubus pruinosus | IE, VCH39 Co. Antrim, Drumnadarragh | John Patrick Micklethwait Brenan Norman Douglas Simpson | | 17/8/1939 | SLBI |
| Rubus pruinosus | IE, VCH39 Co. Antrim, Drumnadarragh | John Patrick Micklethwait Brenan Norman Douglas Simpson | William Charles Richard Watson | 17/8/1939 | SLBI |
| Rubus lettii | IE, VCH39 Co. Antrim, Crumlin | John Patrick Micklethwait Brenan Norman Douglas Simpson | Norman Douglas Simpson | 16/8/1939 | SLBI |
| Carex otrubae | GB, VC33 East Gloucestershire, Walham | Norman Douglas Simpson | Norman Douglas Simpson | 4/7/1939 | E |
| Carex elongata | GB, VC9 Dorset, Wimborne | Norman Douglas Simpson | Norman Douglas Simpson | 14/6/1939 | E |
| Carex ovalis | GB, VC17 Surrey, Peasmarsh | Joanna Charlotte Davy | Norman Douglas Simpson | 1939 | BM |
| 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 |
| Thymus praecox subsp. arcticus | IE, VCH34,VCH40, Magilligan Point | Norman Douglas Simpson | John Patrick Micklethwait Brenan | 6/8/1938 | K |
| Thymus praecox subsp. arcticus | IE, VCH40 Co. Londonderry, Magilligan point | John Patrick Micklethwait Brenan Norman Douglas Simpson | | 6/8/1938 | K |
| Rubus lettii | IE, VCH38 Co. Down, Banbridge | John Patrick Micklethwait Brenan Norman Douglas Simpson | Norman Douglas Simpson | 1/8/1938 | SLBI |
| Carex lasiocarpa | GB, VC69 Westmorland, Cliburn | Norman Douglas Simpson | Norman Douglas Simpson | 16/7/1938 | BM |
| Potamogeton nodosus | GB, VC9 Dorset, Child Okeford | Norman Douglas Simpson | Norman Douglas Simpson | 19/10/1937 | E |
| Potamogeton nodosus | GB, VC9 Dorset, Child Okeford | Norman Douglas Simpson | Norman Douglas Simpson | 19/10/1937 | E |
| Potamogeton nodosus | GB, VC9 Dorset, Child Okeford | Norman Douglas Simpson | Norman Douglas Simpson | 19/10/1937 | E |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Ivybridge | Norman Douglas Simpson | Norman Douglas Simpson | 24/9/1937 | OXF |
| Mentha x piperita var. vulgaris | GB, VC3 South Devon, Ivybridge | Norman Douglas Simpson | Botanical Exchange Club of The British Isles Norman Douglas Simpson | 24/9/1937 | K |
+ | Zostera marina | GB, VC11 South Hampshire, Pennington Marshes | Norman Douglas Simpson | Botanical Society & Exchange Club of The British Isles Norman Douglas Simpson | 7/9/1937 | MANCH |
| Carex hirta | GB, VC9 Dorset, Worbarrow Bay | Norman Douglas Simpson | Norman Douglas Simpson | 11/7/1937 | BM |
| Carex riparia | GB, VC52 Anglesey, Maltraeth | Watts Norman Douglas Simpson | Norman Douglas Simpson | 15/6/1937 | BM |
| Carex ovalis | GB, VC97 West Inverness-shire, Arisaig | Norman Douglas Simpson | Norman Douglas Simpson | 5/8/1936 | BM |
| Carex chordorrhiza | GB, VC108 West Sutherland, Altnaharra | Norman Douglas Simpson | Norman Douglas Simpson Patrick Martin Hall | 3/8/1936 | BM |