| Sagina boydii subsp. apetala | GB, VC34 West Gloucestershire, Siston | Noel Yvri Sandwith | C I & N Y Sandwith Harold Stuart Thompson | 12/8/1920 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC34 West Gloucestershire, Symonds Yat | Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith | | 13/8/1933 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC34 West Gloucestershire, Symonds Yat | Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith | | 13/8/1933 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC34 West Gloucestershire, Symonds Yat | Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith | J Fraser | 13/8/1933 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC34 West Gloucestershire, Symonds Yat | Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith | | 13/8/1933 | K |
| Origanum vulgare subsp. hirtum | GB, VC34 West Gloucestershire, Symonds Yat | Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith | | 13/8/1933 | K |
| Veronica catenata | GB, VC34 West Gloucestershire, Wickwar | Cecil Ivry Sandwith Noel Yvri Sandwith | | 6/9/1936 | K |
| Viola lactea x riviniana | GB, VC34 West Gloucestershire, Yate Lower Common | Cecil Ivry Sandwith Noel Yvri Sandwith | | 16/5/1948 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC6,VC34, Bedminster | Cecil Ivry Sandwith Noel Yvri Sandwith | Noel Yvri Sandwith | 8/9/1930 | K |
| Carex divulsa subsp. divulsa | GB, VC35 Monmouthshire, Kingcoed | Noel Yvri Sandwith | Royal Botanic Gardens, Kew | 27/6/1946 | BM |
| Campanula patula | GB, VC37 Worcestershire, Elmley Lovett | Cecil Ivry Sandwith Noel Yvri Sandwith | | 3/8/1936 | K |
| Callitriche stagnalis | GB, VC37 Worcestershire, Shrawley Wood | Noel Yvri Sandwith | | 17/8/1957 | K |
| Thymus chamaedrys | GB, VC40 Shropshire, Stokesay Castle | Noel Yvri Sandwith | Noel Yvri Sandwith | 17/9/1963 | K |
| Mentha suaveolens | GB, VC41 Glamorganshire, Cardiff, Cardiff Docks | Cecil Ivry Sandwith Noel Yvri Sandwith | | 11/9/1936 | K |
| Viola lactea | GB, VC41 Glamorganshire, Horton | Cecil Ivry Sandwith Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith Olive Milne-Redhead | | 6/5/1935 | 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 x suaveolens = M. x villosa var. nicholsoniana | GB, VC42 Breconshire, Brecon | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 10/9/1932 | K |
| Mentha spicata | GB, VC42 Breconshire, Llangorse Lake | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 10/9/1932 | K |
| Linaria repens | GB, VC42 Breconshire, Trecastle | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 4/9/1932 | K |
| Mentha suaveolens | GB, VC45 Pembrokeshire, Marloes | Cecil Ivry Sandwith Noel Yvri Sandwith | | 6/9/1932 | K |
| Stachys palustris | GB, VC45 Pembrokeshire, Pembroke | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/8/1931 | K |
| Veronica agrestis | GB, VC45 Pembrokeshire, Saint David's | Cecil Ivry Sandwith Noel Yvri Sandwith | | 17/8/1931 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC46 Cardiganshire, Mount | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/1932 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC46 Cardiganshire, Mount | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/9/1932 | K |
| Veronica agrestis | GB, VC48 Merionethshire, Tywyn, Broadwater | Noel Yvri Sandwith | | 14/8/1954 | K |
| Lamium maculatum | GB, VC50 Denbighshire, Llanshaiads | Noel Yvri Sandwith | Noel Yvri Sandwith | 8/7/1942 | K |
| Thymus praecox subsp. arcticus | GB, VC52 Anglesey, South Stack | Noel Yvri Sandwith | | 1/7/1943 | K |
| Lamium purpureum var. hybridum | GB, VC54 North Lincolnshire, Epworth | Noel Yvri Sandwith | | 13/8/1939 | K |
| Groenlandia densa | GB, VC54 North Lincolnshire, Haxey | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/1939 | K |
| Scrophularia umbrosa | GB, VC55 Leicestershire, Exton | Noel Yvri Sandwith | | 25/6/1960 | 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 |
| Potamogeton gramineus | GB, VC56 Nottinghamshire, Everton Carr | Cecil Ivry Sandwith Noel Yvri Sandwith | Harold Stuart Thompson Arthur Bennett | 30/8/1918 | BIRM |
| Callitriche truncata | GB, VC56 Nottinghamshire, Misterton | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/1918 | 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 |
| Mentha suaveolens | GB, VC62 North-east Yorkshire, Hutton le Hole | Noel Yvri Sandwith | | 18/9/1964 | K |