| Callitriche stagnalis | GB, VC17 Surrey, Richmond Park | Francis Ballard Victor Samuel Summerhayes | | | K |
| Fraxinus excelsior | GB, VC24 Buckinghamshire, Wendover | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | | K |
| Oenanthe fistulosa | GB, VC17 Surrey, Esher Common | Horace M Montford P H Williams Victor Samuel Summerhayes | | | K |
| Veronica arvensis | GB, VC17 Surrey, Richmond Park | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | | K |
| Chaenorhinum minus | GB, VC6 North Somerset, Bruton | Victor Samuel Summerhayes | | 5/1913 | K |
| Veronica | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 5/1913 | K |
| Veronica officinalis | GB, VC6 North Somerset, Bruton | Victor Samuel Summerhayes | | 5/1913 | K |
| Ajuga reptans | GB, VC6 North Somerset, Bruton | Victor Samuel Summerhayes | | 6/1913 | K |
| Veronica chamaedrys | GB, VC6 North Somerset, Bruton | Victor Samuel Summerhayes | | 6/1913 | K |
| Kickxia spuria | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 7/1913 | K |
| Thymus chamaedrys | GB, VC6 North Somerset, Mendip Hills | Victor Samuel Summerhayes | | 7/1913 | K |
| Antirrhinum majus | GB, VC6 North Somerset, Cheddar Gorge | Victor Samuel Summerhayes | | 8/1913 | K |
| Baldellia ranunculoides | GB, VC17 Surrey, Richmond Park | Horace M Montford Victor Samuel Summerhayes William Bertram Turrill | | 20/8/1913 | K |
| Stachys palustris | GB, VC6 North Somerset, Walton | Victor Samuel Summerhayes | | 7/1914 | K |
| Thymus praecox subsp. arcticus | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 18/7/1915 | K |
| Clinopodium ascendens | GB, VC6 North Somerset, Brean Down | Victor Samuel Summerhayes | | 9/8/1915 | K |
| Marrubium vulgare | GB, VC6 North Somerset, Brean Down | Victor Samuel Summerhayes | | 9/8/1915 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 10/8/1915 | K |
| Galeopsis bifida | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 3/9/1915 | K |
| Mentha aquatica | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 3/9/1915 | K |
| Clinopodium ascendens | GB, VC6 North Somerset, Ebbor Gorge | Victor Samuel Summerhayes | | 21/9/1915 | K |
| Kickxia elatine subsp. elatine | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 21/9/1915 | K |
| Galeopsis angustifolia | GB, VC2 East Cornwall, Whitsand Bay | Victor Samuel Summerhayes | | 5/1917 | K |
| Melittis melissophyllum | GB, VC2 East Cornwall, Polbathick | Victor Samuel Summerhayes | | 5/1917 | K |
| Veronica arvensis | GB, VC2 East Cornwall, Whitsand Bay | Victor Samuel Summerhayes | | 5/1917 | K |
| Lamium amplexicaule | GB, VC24 Buckinghamshire, Colnbrook | Victor Samuel Summerhayes | | 6/1918 | K |
| Orchis morio | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 6/1918 | K |
| Stachys palustris | GB, VC24 Buckinghamshire, Langley Marish | Victor Samuel Summerhayes | | 6/1918 | K |
| Veronica scutellata | GB, VC21 Middlesex, Uxbridge | Victor Samuel Summerhayes | | 7/1918 | K |
| Veronica scutellata | GB, VC21,VC24, Uxbridge | Victor Samuel Summerhayes | | 8/1918 | K |
| Baldellia ranunculoides | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 8/7/1919 | K |
| Baldellia ranunculoides | GB, VC6 North Somerset, Walton Moor | Victor Samuel Summerhayes | | 8/7/1919 | K |
| Scleranthus annuus | GB, VC21 Middlesex, Harefield | Victor Samuel Summerhayes | | 30/6/1920 | K |
| Mentha aquatica | GB, VC6 North Somerset, Edington | Victor Samuel Summerhayes | | 14/8/1920 | K |
| Stellaria palustris | GB, VC6 North Somerset, Edington | Victor Samuel Summerhayes | | 14/8/1920 | K |
| Galeopsis angustifolia | GB, VC33 East Gloucestershire, Cirencester | L W Cole Victor Samuel Summerhayes | | 17/8/1920 | K |
| Verbascum nigrum | GB, VC33 East Gloucestershire, Cirencester | L W Cole Victor Samuel Summerhayes | | 18/8/1920 | K |
| Monotropa hypopitys | GB, VC33 East Gloucestershire, Birdlip | L W Cole Victor Samuel Summerhayes | | 19/8/1920 | K |
| Torilis arvensis | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 9/1920 | K |
| Veronica polita | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 2/4/1921 | K |