| Mentha x piperita var. vulgaris | GB, VC6 North Somerset, Priddy | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/9/1923 | K |
| Mentha gentilis var. gracilis | GB, VC6 North Somerset, Sharpham Moor | Cecil Ivry Sandwith Noel Yvri Sandwith | | 13/9/1933 | K |
| Plantago coronopus | GB, VC6 North Somerset, Steep Holm | Cecil Ivry Sandwith John Patrick Micklethwait Brenan | | 30/5/1937 | K |
| Veronica hederifolia subsp. sublobata | GB, VC6 North Somerset, Tickenham | Cecil Ivry Sandwith | | 5/5/1941 | K |
| Cuscuta epithymum | GB, VC6 North Somerset, Tickenham | Cecil Ivry Sandwith Noel Yvri Sandwith | | 24/9/1944 | K |
| Plantago lanceolata var. anthoviridis | GB, VC6 North Somerset, Tickenham | Cecil Ivry Sandwith Noel Yvri Sandwith | | 15/5/1951 | K |
| Clinopodium ascendens | GB, VC6 North Somerset, Tickenham | Cecil Ivry Sandwith Noel Yvri Sandwith | | 11/8/1956 | K |
| Mentha x verticillata var. paludosa | GB, VC6 North Somerset, Wedmore | Cecil Ivry Sandwith | | 9/8/1928 | K |
| Veronica beccabunga | GB, VC6 North Somerset, Weston in Gordano | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/6/1930 | K |
| Callitriche obtusangula | GB, VC6 North Somerset, Weston in Gordano | Cecil Ivry Sandwith Noel Yvri Sandwith | | 3/6/1956 | K |
| Ajuga reptans | GB, VC6 North Somerset, Tickenham GB, VC6 North Somerset, Wraxall | Cecil Ivry Sandwith | | 26/5/1930 | K |
| Mentha piperita var. piperita | GB, VC8 South Wiltshire, Semley | Cecil Ivry Sandwith Noel Yvri Sandwith | | 14/9/1955 | K |
| Stachys palustris | GB, VC9 Dorset, Portland | Cecil Ivry Sandwith Noel Yvri Sandwith | | 12/7/1928 | 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 | GB, VC10 Isle of Wight, Apesdown | Cecil Ivry Sandwith | | 8/1933 | K |
| Kickxia spuria | GB, VC11 South Hampshire, Hayling Island | Cecil Ivry Sandwith Noel Yvri Sandwith | | 11/9/1927 | K |
| Festuca arundinacea | GB, VC11 South Hampshire, Redbridge | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/7/1928 | K |
| Teucrium chamaedrys | GB, VC11 South Hampshire, Upham | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/1915 | K |
| Galeopsis angustifolia | GB, VC12 North Hampshire, East Tisted | Cecil Ivry Sandwith Noel Yvri Sandwith | | 22/8/1915 | K |
| Linaria vulgaris x repens = L. x sepium | GB, VC14 East Sussex, Lewes | Cecil Ivry Sandwith Noel Yvri Sandwith | | 24/8/1930 | K |
| Veronica longifolia | GB, VC18 South Essex, Dagenham | Cecil Ivry Sandwith Noel Yvri Sandwith | | 27/9/1936 | 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 arvensis x aquatica = M. x verticillata | GB, VC28 West Norfolk, Ring Mere | Cecil Ivry Sandwith Noel Yvri Sandwith | Noel Yvri Sandwith | 21/8/1926 | 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 |
| Scrophularia umbrosa | GB, VC33 East Gloucestershire, Compton Abdale | Cecil Ivry Sandwith Noel Yvri Sandwith | | 10/9/1936 | K |
| Scrophularia umbrosa | GB, VC33 East Gloucestershire, Compton Abdale | Cecil Ivry Sandwith Noel Yvri Sandwith | | 10/9/1936 | K |
| Scrophularia umbrosa | GB, VC33 East Gloucestershire, Compton Abdale | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/10/1936 | K |
| Astragalus danicus | GB, VC33 East Gloucestershire, Hatherop | Cecil Ivry Sandwith Noel Yvri Sandwith | | 6/1918 | K |
| Linaria repens | GB, VC34 West Gloucestershire, Avonmouth | Cecil Ivry Sandwith Noel Yvri Sandwith | | 21/8/1949 | K |
| Linaria vulgaris x repens = L. x sepium | GB, VC34 West Gloucestershire, Avonmouth | Cecil Ivry Sandwith Noel Yvri Sandwith | | 12/8/1956 | 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 |
| Linaria vulgaris | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol Cultivated | Cecil Ivry Sandwith | | 3/10/1940 | K |
| Linaria vulgaris | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/1935 | K |
| Linaria vulgaris | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/1935 | K |