| Teucrium resupinatum | GB, VC34 West Gloucestershire, Bristol | Cecil Ivry Sandwith Noel Yvri Sandwith | | 25/10/1925 | K |
| Stachys germanica | GB, VC34 West Gloucestershire, Bristol, Baptist Mills | Cecil Ivry Sandwith | | 7/1931 | K |
| Linaria repens | GB, VC34 West Gloucestershire, Chittening Warth | Cecil Ivry Sandwith Noel Yvri Sandwith | | 12/8/1956 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC34 West Gloucestershire, Golden Valley | Cecil Ivry Sandwith Noel Yvri Sandwith | | 11/9/1933 | K |
| Verbascum chaixii subsp. chaixii | GB, VC34 West Gloucestershire, Mangotsfield | Cecil Ivry Sandwith Noel Yvri Sandwith | | 10/7/1949 | K |
| Verbascum chaixii subsp. chaixii | GB, VC34 West Gloucestershire, Mangotsfield | Cecil Ivry Sandwith Noel Yvri Sandwith | | 10/7/1949 | K |
| Veronica catenata | GB, VC34 West Gloucestershire, Wickwar | Cecil Ivry Sandwith Noel Yvri Sandwith | | 6/9/1936 | K |
| Stachys alpina | GB, VC34 West Gloucestershire, Wotton-under-Edge | Cecil Ivry Sandwith | | 8/7/1915 | K |
| Mentha arvensis var. densifoliata | GB, VC34 West Gloucestershire, Yate | Cecil Ivry Sandwith | J Fraser | 1/10/1932 | 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 |
| Mentha suaveolens | GB, VC35 Monmouthshire, Mitchel Troy | Cecil Ivry Sandwith | | 23/9/1933 | K |
| Campanula patula | GB, VC37 Worcestershire, Elmley Lovett | Cecil Ivry Sandwith Noel Yvri Sandwith | | 3/8/1936 | K |
| Mentha suaveolens | GB, VC41 Glamorganshire, Cardiff, Cardiff Docks | Cecil Ivry Sandwith John Patrick Micklethwait Brenan | | 11/9/1935 | K |
| Scrophularia scorodonia | GB, VC41 Glamorganshire, Cardiff, Cardiff Docks | Cecil Ivry Sandwith John Patrick Micklethwait Brenan Royston Leslie Smith | John Patrick Micklethwait Brenan | 4/8/1937 | 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 |
| Limosella australis | GB, VC41 Glamorganshire, Kenfig | Cecil Ivry Sandwith Eleanor Vachell | Eleanor Vachell | 10/1933 | K |
| Mentha aquatica | GB, VC41 Glamorganshire, Kenfig Pool | Cecil Ivry Sandwith | | 20/9/1933 | K |
| Melissa officinalis | GB, VC41 Glamorganshire, Roath | Cecil Ivry Sandwith John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 6/8/1937 | 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 |
| 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 | | 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 |
| 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 diandra | GB, VC6 North Somerset, Ashcott | Cecil Ivry Sandwith | Charles Baylis Green | 1/6/1914 | SLBI |
| Wolffia arrhiza | GB, VC6 North Somerset, Ashcott, Peat Moor | Cecil Ivry Sandwith | | 19/6/1915 | SLBI |
| Euonymus europaeus | GB, VC6 North Somerset, Clay Bottom | Cecil Ivry Sandwith Harold Stuart Thompson | Job Edward Lousley | 7/11/1933 | SLBI |
| Rumex obtusifolius | GB, VC6 North Somerset, Tickenham | Cecil Ivry Sandwith | Job Edward Lousley | 2/10/1940 | SLBI |
| Leonurus cardiaca | GB, Hampshire, Selborne | Cecil Ivry Sandwith | Charles Baylis Green | 26/8/1915 | SLBI |
| Polygonum bellardii | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol | Cecil Ivry Sandwith James Walter White | James Walter White | 27/10/1925 | SLBI |
| Carex acuta | GB, VC34 West Gloucestershire, Pucklechurch | Cecil Ivry Sandwith | Charles Baylis Green | 13/6/1913 | SLBI |