| Veronica agrestis | GB, VC45 Pembrokeshire, Saint David's | Cecil Ivry Sandwith Noel Yvri Sandwith | | 17/8/1931 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC46 Cardiganshire, Mount | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/9/1932 | K |
| Groenlandia densa | GB, VC54 North Lincolnshire, Haxey | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/1939 | K |
| Callitriche truncata | GB, VC56 Nottinghamshire, Clumber Park | Cecil Ivry Sandwith Noel Yvri Sandwith | | 10/9/1918 | K |
| Callitriche truncata | GB, VC56 Nottinghamshire, Clumber Park | Cecil Ivry Sandwith Noel Yvri Sandwith | | 10/9/1918 | K |
| Hypochaeris glabra | GB, VC56 Nottinghamshire, Everton | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/8/1939 | K |
| Galeopsis segetum | GB, VC56 Nottinghamshire, Everton Carr | Cecil Ivry Sandwith Noel Yvri Sandwith | | 30/8/1918 | K |
| Galeopsis versicolor | GB, VC56 Nottinghamshire, Everton Carr | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/8/1939 | K |
| Callitriche truncata | GB, VC56 Nottinghamshire, Misterton | Cecil Ivry Sandwith Noel Yvri Sandwith | | 2/9/1918 | K |
| Callitriche truncata | GB, VC56 Nottinghamshire, Misterton | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/8/1939 | K |
| Scrophularia nodosa | GB, VC64 Mid-west Yorkshire, Clapham | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/7/1934 | K |
| Scrophularia nodosa | GB, VC64 Mid-west Yorkshire, Clapham | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/7/1934 | K |
| Meum athamanticum | GB, VC65 North-west Yorkshire, Garsdale | Arthur Hugh Garfit Alston Cecil Ivry Sandwith Noel Yvri Sandwith | | 7/7/1934 | K |
| Callitriche autumnalis | GB, VC89 East Perthshire, Stormont Loch | Cecil Ivry Sandwith Noel Yvri Sandwith | | 31/7/1936 | K |
| Lamium confertum | GB, VC94 Banffshire, Cullen | Cecil Ivry Sandwith Noel Yvri Sandwith | | 22/7/1938 | K |
| Carex ericetorum | GB, VC26 West Suffolk, Eriswell | Cecil Ivry Sandwith Edgar Wolston Bertram Handsley Milne-Redhead Herbert Kenneth Airy Shaw Noel Yvri Sandwith | | 6/5/1933 | K |
| Veronica praecox | GB, VC26 West Suffolk, Mildenhall | Cecil Ivry Sandwith Edgar Wolston Bertram Handsley Milne-Redhead Herbert Kenneth Airy Shaw Noel Yvri Sandwith | | 6/5/1933 | K |
| Veronica triphyllos | GB, VC26 West Suffolk, Mildenhall | Cecil Ivry Sandwith Edgar Wolston Bertram Handsley Milne-Redhead Herbert Kenneth Airy Shaw Noel Yvri Sandwith | | 6/5/1933 | K |
| Veronica hederifolia | GB, VC26 West Suffolk, Mildenhall | Cecil Ivry Sandwith Edgar Wolston Bertram Handsley Milne-Redhead Herbert Kenneth Airy Shaw M O Shaw Noel Yvri Sandwith | | 6/5/1933 | K |
| Mentha longifolia var. mollissima | GB, VC1 West Cornwall, Scilly Isles,Saint Marys | Cecil Ivry Sandwith | Harold Stuart Thompson | 9/1913 | BIRM |
| Scirpus caespitosus | GB, VC6 North Somerset, Black Down | Cecil Ivry Sandwith | Cedric Bucknall Harold Stuart Thompson | 2/6/1915 | BIRM |
| Gnaphalium uliginosum | GB, VC6 North Somerset, Blagdon | Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 13/10/1933 | BIRM |
| Euonymus europaeus | GB, VC6 North Somerset, Clay Bottom | Cecil Ivry Sandwith Harold Stuart Thompson | Job Edward Lousley | 7/11/1933 | SLBI |
| Viola | GB, VC6 North Somerset, Leigh Woods | Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 12/5/1915 | BIRM |
| Sorbus bristoliensis | GB, VC6 North Somerset, Leigh Woods | Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 6/8/1933 | BIRM |
| Sorbus intermedia | GB, VC6 North Somerset, Leigh Woods | Williams Alfred James Wilmott Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 16/6/1935 to 5/10/1935 | BIRM |
| Juncus tenuis | GB, VC6 North Somerset, River Avon | Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 12/5/1915 1/9/1917 2/1/1918 | BIRM |
| Eriophorum vaginatum | GB, VC6 North Somerset, Westhay Moor | Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 10/7/1935 | BIRM |
| Rumex palustris | GB, VC6 North Somerset, Westhay Moor | Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 10/7/1935 | BIRM |
| Epipactis purpurata | GB, VC11 South Hampshire, Petersfield | Cecil Ivry Sandwith | Harold Stuart Thompson | 25/8/1915 | BIRM |
| Arnoseris minima | GB, VC17 Surrey, Tilford | Cecil Ivry Sandwith Noel Yvri Sandwith | Harold Stuart Thompson | 16/8/1916 | BIRM |
| Arnoseris minima | GB, VC17 Surrey, Tilford | Cecil Ivry Sandwith Noel Yvri Sandwith | Harold Stuart Thompson | 19/8/1916 | BIRM |
| Herminium monorchis | GB, VC33 East Gloucestershire, Painswick | Cecil Ivry Sandwith | Harold Stuart Thompson | | BIRM |
| Pulsatilla vulgaris | GB, VC33 East Gloucestershire, Snowshill | Cecil Ivry Sandwith Noel Yvri Sandwith | Harold Stuart Thompson | 23/4/1919 | BIRM |
| Thlaspi perfoliatum | GB, VC33 East Gloucestershire, Snowshill | Cecil Ivry Sandwith Noel Yvri Sandwith | Harold Stuart Thompson | 23/4/1919 | BIRM |
| Lepidium perfoliatum | GB, VC34 West Gloucestershire, Ashton Gate | Cecil Ivry Sandwith Noel Yvri Sandwith | Harold Stuart Thompson | 5/6/1918 | BIRM |
| Erucastrum gallicum | GB, VC34 West Gloucestershire, Bristol | Cecil Ivry Sandwith Ivor W Evans | Harold Stuart Thompson | 13/9/1936 | BIRM |
| Orobanche hederae | GB, VC34 West Gloucestershire, Clifton | Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 6/1915 | BIRM |
| Rhamnus cathartica | GB, VC34 West Gloucestershire, Clifton Down | Cecil Ivry Sandwith Harold Stuart Thompson | Harold Stuart Thompson | 6/1915 | BIRM |
| Phalaris paradoxa | GB, VC34 West Gloucestershire, Shirehampton | Cecil Ivry Sandwith | Harold Stuart Thompson | 1/7/1918 | BIRM |
| Phalaris minor | GB, VC34 West Gloucestershire, Shirehampton | Cecil Ivry Sandwith | Harold Stuart Thompson | 7/1918 | BIRM |
| Potamogeton gramineus | GB, VC56 Nottinghamshire, Everton Carr | Cecil Ivry Sandwith Noel Yvri Sandwith | Harold Stuart Thompson Arthur Bennett | 30/8/1918 | BIRM |
| Teesdalia nudicaulis | GB, VC56 Nottinghamshire, Harworth | Cecil Ivry Sandwith | Harold Stuart Thompson | 6/1915 | BIRM |
| Limosella australis | GB, VC41 Glamorganshire, Kenfig | Cecil Ivry Sandwith Eleanor Vachell | Eleanor Vachell | 10/1933 | K |
| Lepidium graminifolium | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol | Cecil Ivry Sandwith James Walter White | Watson Botanical Exchange Club Harold Stuart Thompson James Walter White | 27/10/1925 | BIRM |
| Polygonum bellardii | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol | Cecil Ivry Sandwith James Walter White | James Walter White | 27/10/1925 | SLBI |