| Carex arenaria | GB, VC54 North Lincolnshire, Manton | Arthur Hugh Garfit Alston | | 19/8/1950 | BM |
| Carex arenaria | GB, VC85 Fifeshire, Tayport | Arthur Hugh Garfit Alston | | 27/8/1947 | BM |
| Carex arenaria | IE, VCH12 Co. Wexford, Kilmichael Point | Arthur Hugh Garfit Alston | | 27/6/1952 | BM |
| Carex arenaria | IE, VCH12 Co. Wexford, Rosslare Harbour | Arthur Hugh Garfit Alston | | 2/7/1952 | BM |
| Carex dioica | GB, VC45 Pembrokeshire, Carningli | Arthur Hugh Garfit Alston | Arthur Hugh Garfit Alston | 8/9/1932 | BM |
| Carex dioica | GB, VC112 Shetland, Tingwall | Arthur Hugh Garfit Alston | | 12/7/1953 | BM |
| Carex dioica | IE, VCH12 Co. Wexford, Ballythomas Hill | Arthur Hugh Garfit Alston | | 26/6/1952 | BM |
| Carex disticha | GB, VC12 North Hampshire, Hartford | Arthur Hugh Garfit Alston | | 22/8/1948 | BM |
| Carex disticha | GB, VC23 Oxfordshire, Headington Wick | | Arthur Hugh Garfit Alston | 1/6/1922 | BM |
| Carex divisa | GB, VC15 East Kent, Dungeness | Arthur Hugh Garfit Alston | | 7/8/1932 | BM |
| Carex echinata | IE, VCH12 Co. Wexford, Mount Saint Benedict | Arthur Hugh Garfit Alston | | 25/6/1952 | BM |
| Carex hirta | GB, VC53 South Lincolnshire, Rauceby | Arthur Hugh Garfit Alston Norman Douglas Simpson | | 2/8/1945 | BM |
| Carex hirta | GB, VC54 North Lincolnshire, Toynton All Saints | Arthur Hugh Garfit Alston Norman Douglas Simpson | | 8/8/1945 | BM |
| Carex muricata subsp. pairae | IE, VCH12 Co. Wexford, Mount Saint Benedict | Arthur Hugh Garfit Alston | | 25/6/1952 | BM |
| Carex otrubae | GB, Hampshire, Ramsey St Mary | Arthur Hugh Garfit Alston | | 22/5/1948 | BM |
| Carex otrubae | GB, VC54 North Lincolnshire, Broughton | Arthur Hugh Garfit Alston | | 21/8/1950 | BM |
| Carex ovalis | GB, VC72 Dumfriesshire, Dumfries | Arthur Hugh Garfit Alston Norman Douglas Simpson | Norman Douglas Simpson | 30/6/1946 | BM |
| Carex ovalis | IE, VCH12 Co. Wexford, Ballyfad | Arthur Hugh Garfit Alston | | 27/6/1952 | BM |
| Carex paniculata | GB, VC23 Oxfordshire, Headington Wick | Arthur Hugh Garfit Alston | Arthur Hugh Garfit Alston | 1/6/1922 | BM |
| Carex remota | GB, VC23 Oxfordshire, Headington Wick | Arthur Hugh Garfit Alston | Arthur Hugh Garfit Alston | 1/6/1922 | BM |
| Carex remota | IE, VCH12 Co. Wexford, Rosslare Harbour | Arthur Hugh Garfit Alston | | 2/7/1952 | BM |
| Crataegus palmstruchii | GB, VC21 Middlesex, Ruislip | Arthur Hugh Garfit Alston John Richard Wallis Stanislaw Albert Antony Benedict Batko | | 21/9/1944 | SLBI |
+ | Impatiens glandulifera | GB, VC2 East Cornwall, Valley of Looe River near Sandplace, in great abundance | Arthur Hugh Garfit Alston | | 17/9/1948 | 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 |
| Linaria repens | GB, VC42 Breconshire, Trecastle | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 4/9/1932 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC42 Breconshire, Brecon | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 9/1932 | K |
| Mentha spicata | GB, VC42 Breconshire, Llangorse Lake | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 10/9/1932 | K |
| Mentha spicata x suaveolens = M. x villosa var. nicholsoniana | GB, VC42 Breconshire, Brecon | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 10/9/1932 | K |
| Mentha x verticillata var. rivalis | GB, VC15 East Kent, Dungeness | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 8/1932 | K |
| Mentha x verticillata var. rivalis | GB, VC15 East Kent, Dungeness | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 8/1932 | K |
| Meum athamanticum | GB, VC65 North-west Yorkshire, Garsdale | Arthur Hugh Garfit Alston Cecil Ivry Sandwith Noel Yvri Sandwith | | 7/7/1934 | K |
| Potamogeton berchtoldii | GB, VC21 Middlesex, Bushy Park | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 8/8/1940 | SLBI |
| Potamogeton berchtoldii x acutifolius = P. x sudermanicus | GB, VC9 Dorset, Arne | Arthur Hugh Garfit Alston | | 26/5/1946 | SLBI |
| Potamogeton natans | GB, VC112 Shetland, Stanevatstoe Loch, Sandness | Arthur Hugh Garfit Alston | | 8/7/1953 | E |