| 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 |
| Veronica hederifolia | GB, VC2 East Cornwall, Cornwall,Truro,Tresillian | Cecil Ivry Sandwith | | 27/4/1935 | K |
| Wolffia arrhiza | GB, VC6 North Somerset, Ashcott, Peat Moor | Cecil Ivry Sandwith | | 19/6/1915 | SLBI |
| Veronica hederifolia subsp. sublobata | GB, VC6 North Somerset, Tickenham | Cecil Ivry Sandwith | | 5/5/1941 | K |
| Ajuga reptans | GB, VC6 North Somerset, Tickenham GB, VC6 North Somerset, Wraxall | Cecil Ivry Sandwith | | 26/5/1930 | K |
| Mentha arvensis | GB, VC10 Isle of Wight, Apesdown | Cecil Ivry Sandwith | | 8/1933 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC28 West Norfolk, Thetford | Cecil Ivry Sandwith | | 22/8/1926 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC28 West Norfolk, Thetford | Cecil Ivry Sandwith | | 22/8/1926 | K |
| Linaria vulgaris | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol Cultivated | Cecil Ivry Sandwith | | 3/10/1940 | K |
| Plantago coronopus | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol | Cecil Ivry Sandwith | | 1/9/1928 | K |
| Plantago maritima | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol | Cecil Ivry Sandwith | | 6/1932 | K |
| Stachys germanica | GB, VC34 West Gloucestershire, Bristol, Baptist Mills | Cecil Ivry Sandwith | | 7/1931 | K |
| Stachys alpina | GB, VC34 West Gloucestershire, Wotton-under-Edge | Cecil Ivry Sandwith | | 8/7/1915 | K |
| Mentha suaveolens | GB, VC35 Monmouthshire, Mitchel Troy | Cecil Ivry Sandwith | | 23/9/1933 | K |
| Mentha aquatica | GB, VC41 Glamorganshire, Kenfig Pool | Cecil Ivry Sandwith | | 20/9/1933 | 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 |
| Rumex obtusifolius | GB, VC6 North Somerset, Tickenham | Cecil Ivry Sandwith | Job Edward Lousley | 2/10/1940 | SLBI |
| Mentha suaveolens | GB, VC41 Glamorganshire, Cardiff, Cardiff Docks | Cecil Ivry Sandwith Noel Yvri Sandwith | | 11/9/1936 | K |
| Carex diandra | GB, VC6 North Somerset, Ashcott | Cecil Ivry Sandwith | Charles Baylis Green | 1/6/1914 | SLBI |
| Leonurus cardiaca | GB, Hampshire, Selborne | Cecil Ivry Sandwith | Charles Baylis Green | 26/8/1915 | SLBI |
| Carex acuta | GB, VC34 West Gloucestershire, Pucklechurch | Cecil Ivry Sandwith | Charles Baylis Green | 13/6/1913 | SLBI |
| Mentha x piperita var. vulgaris | GB, VC6 North Somerset, Priddy | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/9/1923 | K |
| Mentha piperita var. piperita | GB, VC8 South Wiltshire, Semley | Cecil Ivry Sandwith Noel Yvri Sandwith | | 14/9/1955 | K |
| Mentha spicata | GB, VC2 East Cornwall, Veryan | Cecil Ivry Sandwith Noel Yvri Sandwith | | 14/8/1934 | K |
| Mentha x verticillata var. paludosa | GB, VC6 North Somerset, Wedmore | Cecil Ivry Sandwith | | 9/8/1928 | K |
| Mentha aquatica | GB, VC9 Dorset, Stoborough | Cecil Ivry Sandwith | | 25/8/1933 | K |
| Mentha x verticillata var. rivalis | GB, VC9 Dorset, Stoborough | Cecil Ivry Sandwith | J Fraser | 25/8/1933 | K |
| Mentha arvensis var. densifoliata | GB, VC34 West Gloucestershire, Yate | Cecil Ivry Sandwith | J Fraser | 1/10/1932 | K |
| Mentha suaveolens | GB, VC45 Pembrokeshire, Marloes | Cecil Ivry Sandwith Noel Yvri Sandwith | | 6/9/1932 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC46 Cardiganshire, Mount | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/1932 | K |
| Plantago coronopus | GB, VC6 North Somerset, Steep Holm | Cecil Ivry Sandwith John Patrick Micklethwait Brenan | | 30/5/1937 | 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 |
| Melissa officinalis | GB, VC41 Glamorganshire, Roath | Cecil Ivry Sandwith John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 6/8/1937 | K |
| Callitriche truncata | GB, VC56 Nottinghamshire, Misterton | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/1918 | K |
| Carex hirta | GB, VC6 North Somerset, Berrow | Cecil Ivry Sandwith Noel Yvri Sandwith | Royal Botanic Gardens, Kew | 8/7/1951 | BM |