| Veronica arvensis | GB, VC17 Surrey, Richmond Park | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | | K |
| Veronica hederifolia | GB, VC17 Surrey, Richmond Park | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | 2/4/1931 | K |
| Thymus chamaedrys | GB, VC6 North Somerset, Mendip Hills | Victor Samuel Summerhayes | | 7/1913 | K |
| Thymus chamaedrys | GB, VC24 Buckinghamshire, Fingest | Victor Samuel Summerhayes | | 11/8/1946 | K |
| Thymus praecox subsp. arcticus | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 18/7/1915 | K |
| Thymus praecox subsp. arcticus | GB, VC49 Caernarvonshire, Capel Curig | Victor Samuel Summerhayes | | 20/7/1947 | K |
| Thymus praecox subsp. arcticus | GB, VC47 Montgomeryshire, Abermule | Victor Samuel Summerhayes | | 3/7/1955 | K |
| Callitriche platycarpa | GB, VC47 Montgomeryshire, Waen-y-pant | Victor Samuel Summerhayes | | 5/7/1955 | K |
| Callitriche stagnalis | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 9/7/1928 | K |
| Callitriche intermedia subsp. hamulata | GB, VC17 Surrey, Richmond Park | Herbert Kenneth Airy Shaw Noel Yvri Sandwith Victor Samuel Summerhayes | | 17/7/1930 | K |
| Callitriche stagnalis | GB, VC17 Surrey, Richmond Park | Herbert Kenneth Airy Shaw Noel Yvri Sandwith Victor Samuel Summerhayes | | 17/7/1930 | K |
| Scrophularia auriculata | GB, VC17 Surrey, Richmond Park | Herbert Kenneth Airy Shaw Noel Yvri Sandwith Victor Samuel Summerhayes | | 17/7/1930 | K |
| Veronica scutellata | GB, VC17 Surrey, Richmond Park | Herbert Kenneth Airy Shaw Noel Yvri Sandwith Victor Samuel Summerhayes | | 17/7/1930 | K |
| Aceras anthropophorum | GB, VC11 South Hampshire, Telegraph Hill, Winchester | Victor Samuel Summerhayes | | 5/6/1955 | K |
| Aceras anthropophorum | GB, VC15 East Kent, Queendown Warren | Victor Samuel Summerhayes | | 25/5/1952 | K |
| Aceras anthropophorum | GB, VC30 Bedfordshire, Totternhoe | Victor Samuel Summerhayes | | 12/6/1947 | K |
| Aceras anthropophorum | GB, VC11 South Hampshire, Stephens Castle Down | Victor Samuel Summerhayes | | 5/6/1955 | K |
| Aceras anthropophorum | GB, VC23 Oxfordshire, Ipsden | Victor Samuel Summerhayes | | 7/6/1953 | K |
| Ajuga reptans | GB, VC15 East Kent, Wye Downs | Victor Samuel Summerhayes | | 28/5/1946 | K |
| Ajuga reptans | GB, VC6 North Somerset, Bruton | Victor Samuel Summerhayes | | 6/1913 | K |
| Ajuga reptans | GB, VC6 North Somerset, Ivy Thorn Hill | Victor Samuel Summerhayes | | 21/4/1935 | K |
| Antirrhinum majus | GB, VC6 North Somerset, Cheddar Gorge | Victor Samuel Summerhayes | | 8/1913 | K |
| Astragalus danicus | GB, VC67 South Northumberland, Cresswell | Victor Samuel Summerhayes | | 28/6/1958 | K |
| Astragalus danicus | GB, VC71 Isle of Man, Scarlet Point | Victor Samuel Summerhayes | | 4/7/1953 | K |
| Baldellia ranunculoides | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 8/7/1919 | K |
| Baldellia ranunculoides | GB, VC17 Surrey, Richmond Park | Charles Edward Hubbard Victor Samuel Summerhayes | | 2/9/1929 | K |
| Baldellia ranunculoides | GB, VC6 North Somerset, Walton Moor | Victor Samuel Summerhayes | | 8/7/1919 | K |
| Ballota nigra | GB, VC28 West Norfolk, Flitcham | Victor Samuel Summerhayes | | 18/7/1949 | K |
| Callitriche obtusangula | GB, VC6 North Somerset, Glastonbury | Victor Samuel Summerhayes | | 27/5/1956 | K |
| Callitriche platycarpa | GB, VC6 North Somerset, Sharpham Park | Victor Samuel Summerhayes | | 18/7/1956 | K |
| Callitriche stagnalis | GB, VC67 South Northumberland, Druridge | Victor Samuel Summerhayes | | 28/6/1958 | K |
| Callitriche stagnalis | GB, VC17 Surrey, Richmond Park | Charles Edward Hubbard Victor Samuel Summerhayes | | 2/9/1929 | K |
| Callitriche stagnalis | GB, VC17 Surrey, Richmond Park | Charles Edward Hubbard Victor Samuel Summerhayes | | 2/9/1929 | K |
| Callitriche stagnalis | GB, VC17 Surrey, Richmond Park | Francis Ballard Victor Samuel Summerhayes | | | K |
| Callitriche stagnalis | GB, VC17 Surrey, Richmond Park | Francis Ballard Victor Samuel Summerhayes | | 28/6/1930 | K |
| Cephalanthera longifolia | GB, VC8 South Wiltshire, Winterbourne | Victor Samuel Summerhayes | | 19/5/1957 | K |
| Cephalanthera longifolia | GB, VC8 South Wiltshire, Winterbourne | Victor Samuel Summerhayes | | 23/5/1956 | 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 |