| Cephalanthera damasonium | GB, VC17 Surrey, East Horsley | Victor Samuel Summerhayes William Bertram Turrill | | 31/5/1927 | BR |
| Cephalanthera longifolia | GB, VC8 South Wiltshire, Winterbourne | Victor Samuel Summerhayes | | 23/5/1956 | K |
| Cephalanthera longifolia | GB, VC8 South Wiltshire, Winterbourne | Victor Samuel Summerhayes | | 19/5/1957 | K |
| Cephalanthera longifolia | GB, VC11 South Hampshire, West Meon | Victor Samuel Summerhayes | | 5/6/1955 | K |
| Chaenorhinum minus | GB, VC6 North Somerset, Bruton | Victor Samuel Summerhayes | | 5/1913 | K |
| Chaenorhinum minus | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 30/7/1945 | K |
| Chaenorhinum minus | GB, VC23 Oxfordshire, Stonesfield | Horace M Montford Victor Samuel Summerhayes William Bertram Turrill | | 5/8/1930 | K |
| Clinopodium ascendens | GB, VC6 North Somerset, Brean Down | Victor Samuel Summerhayes | | 9/8/1915 | K |
| Clinopodium ascendens | GB, VC6 North Somerset, Ebbor Gorge | Victor Samuel Summerhayes | | 21/9/1915 | K |
| Clinopodium ascendens | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 6/8/1943 | K |
| Cuscuta epithymum | GB, VC9 Dorset, Stoborough | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | 17/6/1933 | K |
| Cuscuta epithymum | GB, VC14 East Sussex, Ashdown Forest | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | 18/8/1931 | K |
| Cuscuta epithymum | GB, VC71 Isle of Man, Scarlet Point | Victor Samuel Summerhayes | | 4/7/1953 | K |
| Cymbalaria muralis | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 19/4/1935 | K |
| Cymbalaria muralis | GB, VC71 Isle of Man, Port Erin | Victor Samuel Summerhayes | | 4/7/1953 | K |
| Dactylis glomerata | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 18/8/1932 | K |
| Dactylis glomerata | GB, VC21 Middlesex, Osterley | Francis Ballard Victor Samuel Summerhayes | | 2/7/1930 | K |
| Dianthus deltoides | GB, VC96,VC106, North Kessock | Peter Francis Hunt Victor Samuel Summerhayes | | 6/7/1962 | K |
| Digitalis purpurea | GB, VC17 Surrey, Richmond Park | Victor Samuel Summerhayes William Bertram Turrill | | 11/12/1934 | K |
| Digitalis purpurea | GB, VC17 Surrey, Richmond Park, Isabella Plantation | Victor Samuel Summerhayes William Bertram Turrill | | 20/10/1929 | K |
| Digitalis purpurea | GB, VC17 Surrey, Richmond Park, Isabella Plantation | Victor Samuel Summerhayes William Bertram Turrill | | 20/10/1929 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Burnham-on-Sea | Victor Samuel Summerhayes | | 22/7/1928 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Burnham-on-Sea | Victor Samuel Summerhayes | | 22/7/1928 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Ivy Thorn Hill | Victor Samuel Summerhayes | | 14/7/1928 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Ivy Thorn Hill | Victor Samuel Summerhayes | | 14/7/1928 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 13/7/1928 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 13/7/1928 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 27/6/1945 | K |
| Festuca arundinacea | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 2/7/1945 | K |
| Festuca arundinacea | GB, VC17 Surrey, Kew | Victor Samuel Summerhayes William Bertram Turrill | | 25/6/1929 | K |
| Festuca arundinacea | GB, VC80 Roxburghshire, Tweeden Burn | Victor Samuel Summerhayes | | 16/7/1939 | K |
| Fraxinus | GB, VC17 Surrey, Richmond Park | Arthur Allman Bullock Victor Samuel Summerhayes | | 22/4/1934 | K |
| Fraxinus excelsior | GB, VC20 Hertfordshire, Hemel Hempstead | Victor Samuel Summerhayes William Bertram Turrill | | 10/6/1928 | K |
| Fraxinus excelsior | GB, VC24 Buckinghamshire, Wendover | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | | K |
| Galeopsis angustifolia | GB, VC2 East Cornwall, Whitsand Bay | Victor Samuel Summerhayes | | 5/1917 | K |
| Galeopsis angustifolia | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 2/8/1943 | K |
| Galeopsis angustifolia | GB, VC11 South Hampshire, Petersfield | Victor Samuel Summerhayes | | 25/7/1952 | K |
| Galeopsis angustifolia | GB, VC13 West Sussex, Pagham | Victor Samuel Summerhayes | | 24/7/1931 | K |
| Galeopsis angustifolia | GB, VC23 Oxfordshire, Stonesfield | Horace M Montford Victor Samuel Summerhayes William Bertram Turrill | | 5/8/1930 | K |
| Galeopsis angustifolia | GB, VC28 West Norfolk, Wolferton | Victor Samuel Summerhayes | | 16/7/1949 | K |