| Senecio squalidus | GB, VC21 Middlesex, City of London | Noel Yvri Sandwith | Botanical Society & Exchange Club of The British Isles | 14/9/1943 | SLBI |
| Carex divulsa subsp. divulsa | GB, VC35 Monmouthshire, Kingcoed | Noel Yvri Sandwith | Royal Botanic Gardens, Kew | 27/6/1946 | BM |
| Carex hirta | GB, VC6 North Somerset, Berrow | Cecil Ivry Sandwith Noel Yvri Sandwith | Royal Botanic Gardens, Kew | 8/7/1951 | BM |
| Senecio squalidus | GB, VC21 Middlesex, City of London | Noel Yvri Sandwith | Botanical Society & Exchange Club of The British Isles Royal Botanic Gardens, Kew | 22/6/1944 | SLBI |
| Callitriche truncata | GB, VC56 Nottinghamshire, Misterton | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/1918 | K |
| Cuscuta epithymum | GB, VC15 East Kent, Dungeness | John Patrick Micklethwait Brenan Noel Yvri Sandwith | | 20/9/1936 | K |
| Fallopia dumetorum | GB, VC17 Surrey, Wimbledon Common | John Patrick Micklethwait Brenan Noel Yvri Sandwith | John Patrick Micklethwait Brenan | 10/1948 | K |
| Glechoma hederacea | GB, VC17 Surrey, Wisley | John Patrick Micklethwait Brenan Noel Yvri Sandwith | John Patrick Micklethwait Brenan | 6/4/1946 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC23 Oxfordshire, Oxford,Port Meadow | John Patrick Micklethwait Brenan Noel Yvri Sandwith | | 30/8/1941 | K |
| Carex otrubae x remota = C. x pseudoaxillaris | GB, VC19 North Essex, Heybridge | Noel Yvri Sandwith | | 26/6/1955 | BM |
| Mentha x verticillata var. rivalis | GB, VC15 East Kent, Dungeness | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 8/1932 | K |
| Mentha aquatica | GB, VC17 Surrey, Cut Mill Pond | J Fraser Noel Yvri Sandwith | | 21/8/1927 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC46 Cardiganshire, Mount | Cecil Ivry Sandwith Noel Yvri Sandwith | | 9/1932 | K |
| Mentha arvensis var. densifoliata | GB, VC6 North Somerset, Glastonbury | Noel Yvri Sandwith | | 13/9/1933 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC17 Surrey, Wisley | J Fraser Noel Yvri Sandwith | | 21/8/1927 | 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 spicata | GB, VC2 East Cornwall, Veryan | Cecil Ivry Sandwith Noel Yvri Sandwith | | 14/8/1934 | K |
| Mentha spicata x suaveolens = M. x villosa | GB, VC6 North Somerset, Compton Dando | Noel Yvri Sandwith | J Fraser | 11/9/1933 | K |
| Mentha suaveolens | GB, VC34 West Gloucestershire, Lydbrook, Worrall Hill | Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith | | 13/8/1933 | K |
| Mentha suaveolens | GB, VC45 Pembrokeshire, Marloes | Cecil Ivry Sandwith Noel Yvri Sandwith | | 6/9/1932 | K |
| Mentha x verticillata var. rivalis | GB, VC15 East Kent, Dungeness | Arthur Hugh Garfit Alston Noel Yvri Sandwith | | 8/1932 | K |
| Ajuga reptans | GB, VC31 Huntingdonshire, Little Paxton | John Lester Gilbert Noel Yvri Sandwith | | 3/8/1958 | K |
| Marrubium vulgare | GB, VC31 Huntingdonshire, Conington | John Lester Gilbert Noel Yvri Sandwith | | 21/9/1957 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC31 Huntingdonshire, Godmanchester | John Lester Gilbert Noel Yvri Sandwith | | 7/8/1960 | K |
| Mentha spicata x longifolia = M. x villosonervata | GB, VC17 Surrey, Ham | John Lester Gilbert Noel Yvri Sandwith | | 31/7/1960 | K |
| Scleranthus annuus | GB, VC31 Huntingdonshire, Molesworth | John Lester Gilbert Noel Yvri Sandwith | | 6/8/1960 | K |
| Verbascum phlomoides | GB, VC31 Huntingdonshire | John Lester Gilbert Noel Yvri Sandwith | | 4/7/1958 | K |
| Verbascum phlomoides | GB, VC31 Huntingdonshire, Great Staughton | John Lester Gilbert Noel Yvri Sandwith | | 4/8/1958 | K |
| Verbascum phlomoides | GB, VC31 Huntingdonshire, Great Staughton | John Lester Gilbert Noel Yvri Sandwith | | 4/8/1958 | K |
| Mentha piperita var. piperita | GB, VC8 South Wiltshire, Semley | Cecil Ivry Sandwith Noel Yvri Sandwith | | 14/9/1955 | K |
| Mentha x piperita var. vulgaris | GB, VC6 North Somerset, Priddy | Cecil Ivry Sandwith Noel Yvri Sandwith | | 8/9/1923 | K |
| Mentha aquatica | GB, VC17 Surrey, Richmond Park, Pen Pond | Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith | | 14/9/1934 | 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 = M. x verticillata | GB, VC34 West Gloucestershire, Symonds Yat | Edgar Wolston Bertram Handsley Milne-Redhead Noel Yvri Sandwith | | 13/8/1933 | K |
| Mentha suaveolens | GB, VC41 Glamorganshire, Cardiff, Cardiff Docks | Cecil Ivry Sandwith Noel Yvri Sandwith | | 11/9/1936 | K |
| Scrophularia auriculata | GB, VC17 Surrey, Kew GB, VC17 Surrey, Richmond | Noel Yvri Sandwith | | 2/8/1927 | K |
| Salsola kali | GB, VC17 Surrey, Chipstead | Albert Bruce Jackson Job Edward Lousley Noel Yvri Sandwith | | 2/10/1943 | SLBI |
| Sorbus whiteana | GB, VC34 West Gloucestershire, Clifton Down | George Taylor Noel Yvri Sandwith | Job Edward Lousley | 20/9/1931 | SLBI |
| Mentha aquatica | GB, VC17 Surrey, Richmond Park | Arthur Keith Jackson Cecil Victor Boley Marquand Herbert Kenneth Airy Shaw Noel Yvri Sandwith | | 14/9/1934 | K |
| Callitriche stagnalis | GB, VC17 Surrey, Claygate | Noel Yvri Sandwith | | 3/6/1957 | K |