| Festuca arundinacea | GB, VC1 West Cornwall, Kynance Cove | Noel Yvri Sandwith | | 8/6/1949 | K |
| Plantago coronopus | GB, VC1 West Cornwall, Lizard | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/6/1937 | K |
| Galeopsis tetrahit | GB, VC2 East Cornwall, Ruan High Lanes | Cecil Ivry Sandwith Noel Yvri Sandwith | | 14/8/1934 | K |
| Mentha spicata | GB, VC2 East Cornwall, Veryan | Cecil Ivry Sandwith Noel Yvri Sandwith | | 14/8/1934 | K |
| Gagea lutea | GB, VC6 North Somerset, Bath | Noel Yvri Sandwith | Harold Stuart Thompson | 3/1919 | BIRM |
| Carex hirta | GB, VC6 North Somerset, Berrow | Cecil Ivry Sandwith Noel Yvri Sandwith | Royal Botanic Gardens, Kew | 8/7/1951 | BM |
| Oenanthe fistulosa | GB, VC6 North Somerset, Catcott | Noel Yvri Sandwith | | 2/7/1963 | K |
| Oenanthe fistulosa | GB, VC6 North Somerset, Catcott | Noel Yvri Sandwith | | 29/7/1963 | K |
| Stachys palustris | GB, VC6 North Somerset, Catcott | Cecil Ivry Sandwith Noel Yvri Sandwith | | 21/7/1958 | K |
| Mentha piperita var. piperita | GB, VC6 North Somerset, Charterhouse on Mendip | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/8/1959 | K |
| Mentha piperita var. piperita | GB, VC6 North Somerset, Charterhouse on Mendip | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/8/1959 | K |
| Ligustrum vulgare | GB, VC6 North Somerset, Cleeve Toot | Cecil Ivry Sandwith Noel Yvri Sandwith | | 29/12/1945 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Clifton Bridge | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/5/1955 | K |
| Callitriche stagnalis | GB, VC6 North Somerset, Clutton | Noel Yvri Sandwith | | 7/6/1959 | K |
| Mentha spicata | GB, VC6 North Somerset, Compton Dando | Noel Yvri Sandwith | | 11/9/1933 | K |
| Mentha spicata x suaveolens = M. x villosa | GB, VC6 North Somerset, Compton Dando | Noel Yvri Sandwith | J Fraser | 11/9/1933 | K |
| Mentha arvensis | GB, VC6 North Somerset, Cranmore | Cecil Ivry Sandwith Noel Yvri Sandwith | | 30/7/1941 | K |
| Polygala calcarea | GB, VC6 North Somerset, Fortnight | Noel Yvri Sandwith | Harold Stuart Thompson | 3/6/1920 | BIRM |
| Mentha arvensis var. densifoliata | GB, VC6 North Somerset, Glastonbury | Noel Yvri Sandwith | | 13/9/1933 | K |
| Veronica catenata | GB, VC6 North Somerset, Gurney Slade | Cecil Ivry Sandwith Noel Yvri Sandwith | | 6/8/1959 | K |
| Callitriche truncata | GB, VC6 North Somerset, Kingston Seymour | Cecil Ivry Sandwith Noel Yvri Sandwith | | 24/9/1951 27/9/1951 | K |
| Ajuga reptans | GB, VC6 North Somerset, Leigh Woods | Cecil Ivry Sandwith Noel Yvri Sandwith | | 15/5/1927 | K |
| Juncus subnodulosus | GB, VC6 North Somerset, Nailsea | Harold Stuart Thompson Noel Yvri Sandwith | Harold Stuart Thompson | 10/9/1921 | BIRM |
| Veronica scutellata | GB, VC6 North Somerset, Nailsea | Cecil Ivry Sandwith Noel Yvri Sandwith | | 1/7/1947 | K |
| Veronica catenata | GB, VC6 North Somerset, Portbury | Cecil Ivry Sandwith Noel Yvri Sandwith | | 19/6/1929 | K |
| 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 |
| Clinopodium ascendens | GB, VC6 North Somerset, Tickenham | Cecil Ivry Sandwith Noel Yvri Sandwith | | 11/8/1956 | K |
| Clinopodium ascendens | GB, VC6 North Somerset, Tickenham | Noel Yvri Sandwith | | 17/9/1932 | 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 |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC6 North Somerset, Walton in Gordano | Noel Yvri Sandwith | | 9/1920 | K |
| Callitriche obtusangula | GB, VC6 North Somerset, Weston in Gordano | Cecil Ivry Sandwith Noel Yvri Sandwith | | 3/6/1956 | K |
| Mentha x piperita | GB, VC6 North Somerset, Weston in Gordano | Cecil I Sandwith Noel Yvri Sandwith | | 9/1920 | K |
| Veronica beccabunga | GB, VC6 North Somerset, Weston in Gordano | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/6/1930 | K |
| Dactylis glomerata | GB, VC8 South Wiltshire, Ham | Noel Yvri Sandwith | | 18/6/1950 | K |
| Galeopsis tetrahit | GB, VC8 South Wiltshire, Semley | Noel Yvri Sandwith | | 11/9/1955 | K |
| Mentha piperita var. piperita | GB, VC8 South Wiltshire, Semley | Cecil Ivry Sandwith Noel Yvri Sandwith | | 14/9/1955 | K |
| Scrophularia umbrosa | GB, VC8 South Wiltshire, Shalbourne | Noel Yvri Sandwith | | 1/7/1927 | K |
| Scrophularia umbrosa | GB, VC8 South Wiltshire, Shalbourne | Noel Yvri Sandwith | | 1/7/1927 | K |