| Herminium monorchis | GB, VC7 North Wiltshire, Calne | Victor Samuel Summerhayes | | 23/6/1948 | K |
| Herminium monorchis | GB, VC9 Dorset, Cerne Abbas | Victor Samuel Summerhayes | | 21/7/1956 | K |
| Herminium monorchis | GB, VC30 Bedfordshire, Sundon | Victor Samuel Summerhayes | | 8/7/1946 | K |
| Herminium monorchis | GB, VC33 East Gloucestershire, Painswick | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | 11/7/1931 | K |
| Hordeum marinum | GB, VC6 North Somerset, Burnham-on-Sea | Victor Samuel Summerhayes | | 10/7/1927 | K |
| Hordeum marinum | GB, VC18 South Essex, Canvey Island | Victor Samuel Summerhayes William Bertram Turrill | | 24/6/1928 | K |
| Hypochaeris glabra | GB, VC56 Nottinghamshire, Everton | Victor Samuel Summerhayes | | 6/7/1946 | K |
| Kickxia elatine subsp. elatine | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 21/9/1915 | K |
| Kickxia elatine subsp. elatine | GB, VC6 North Somerset, Walton | Victor Samuel Summerhayes | | 19/7/1928 | K |
| Kickxia spuria | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 7/1913 | K |
| Kickxia spuria | GB, VC23 Oxfordshire, Stonesfield | Horace M Montford Victor Samuel Summerhayes William Bertram Turrill | | 5/8/1930 | K |
| Lamium album | GB, VC6 North Somerset, Glastonbury | Victor Samuel Summerhayes | | 22/4/1936 | K |
| Lamium album | GB, VC6 North Somerset, Pitney | Victor Samuel Summerhayes | | 9/4/1921 | K |
| Lamium album | GB, VC23 Oxfordshire, Bladon | Horace M Montford Victor Samuel Summerhayes William Bertram Turrill | | 4/8/1930 | K |
| Lamium amplexicaule | GB, VC11 South Hampshire, Bournemouth | Victor Samuel Summerhayes | | 28/4/1930 | K |
| Lamium amplexicaule | GB, VC17 Surrey, East Sheen, London | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | 2/6/1931 | K |
| Lamium amplexicaule | GB, VC23 Oxfordshire, Woodstock | Horace M Montford Victor Samuel Summerhayes William Bertram Turrill | | 30/8/1930 | K |
| Lamium amplexicaule | GB, VC24 Buckinghamshire, Colnbrook | Victor Samuel Summerhayes | | 6/1918 | K |
| Lamium amplexicaule | GB, VC27 East Norfolk, Sheringham | Victor Samuel Summerhayes | | 15/7/1951 | K |
| Lamium amplexicaule | GB, VC68 North Northumberland, South Charlton | Victor Samuel Summerhayes | | 30/6/1958 | K |
| Lamium galeobdolon subsp. montanum | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 21/4/1935 | K |
| Lamium galeobdolon subsp. montanum | GB, VC17 Surrey, East Horsley | Victor Samuel Summerhayes William Bertram Turrill | | 31/5/1927 | K |
| Lamium galeobdolon subsp. montanum | GB, VC17 Surrey, East Horsley | Victor Samuel Summerhayes William Bertram Turrill | | 31/5/1927 | K |
| Lamium galeobdolon subsp. montanum | GB, VC17 Surrey, East Horsley | Victor Samuel Summerhayes William Bertram Turrill | | 31/5/1927 | K |
| Lamium maculatum | GB, VC106 East Ross & Cromarty, Conon Bridge | Elizabeth Joan Gibbons | Victor Samuel Summerhayes | 6/7/1962 | K |
| Lamium purpureum var. incisum | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 24/4/1936 | K |
| Lamium purpureum var. purpureum | GB, VC17 Surrey, Kew | Victor Samuel Summerhayes | | 15/5/1928 | K |
| Lamium purpureum var. purpureum | GB, VC17 Surrey, Kew Cultivated | Victor Samuel Summerhayes | | 15/5/1928 | K |
| Lamium purpureum var. purpureum | GB, VC17 Surrey, Richmond Park | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | 29/4/1931 | K |
| Lamium purpureum var. incisum | GB, VC71 Isle of Man, Castletown | Victor Samuel Summerhayes | | 2/7/1950 | K |
| Ligustrum vulgare | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 29/6/1945 | K |
| Ligustrum vulgare | GB, VC28 West Norfolk, Burnham Overy | Victor Samuel Summerhayes | | 18/7/1949 | K |
| Linaria repens | GB, VC3 South Devon, Sidmouth | Victor Samuel Summerhayes | | 25/6/1965 | K |
| Linaria repens | GB, VC23 Oxfordshire, Henley on Thames | Victor Samuel Summerhayes | | 24/7/1929 | K |
| Linaria repens | GB, VC24 Buckinghamshire, Fingest | Victor Samuel Summerhayes | | 2/8/1946 | K |
| Lycopus europaeus | GB, VC17 Surrey, Kew | Victor Samuel Summerhayes William Bertram Turrill | | 30/7/1928 | K |
| Lycopus europaeus | GB, VC17 Surrey, Kew | Victor Samuel Summerhayes William Bertram Turrill | | 30/7/1928 | K |
| Lycopus europaeus | GB, VC17 Surrey, Kew | Victor Samuel Summerhayes William Bertram Turrill | | 30/7/1928 | K |
| Lycopus europaeus | GB, VC17 Surrey, Kew | Victor Samuel Summerhayes William Bertram Turrill | | 30/7/1923 | K |
| Lycopus europaeus | GB, VC23 Oxfordshire, Blenheim Park | Horace M Montford Victor Samuel Summerhayes William Bertram Turrill | | 2/8/1930 | K |