| Galeopsis angustifolia | GB, VC23 Oxfordshire, Stonesfield | Horace M Montford Victor Samuel Summerhayes William Bertram Turrill | | 5/8/1930 | K |
| Galeopsis bifida | GB, VC107 East Sutherland, Helmsdale | Peter Francis Hunt Victor Samuel Summerhayes | | 8/7/1962 | K |
| Galeopsis bifida | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 3/9/1915 | K |
| Galeopsis tetrahit | GB, VC106 East Ross & Cromarty, Kilmuir | Peter Francis Hunt Victor Samuel Summerhayes | | 6/7/1962 | K |
| Galeopsis tetrahit | GB, VC6 North Somerset, Street | Victor Samuel Summerhayes | | 9/4/1929 | K |
| Galeopsis tetrahit | GB, VC98 Argyllshire, Connel | Victor Samuel Summerhayes | | 16/9/1958 | K |
| Galeopsis versicolor | GB, VC98 Argyllshire, Connel | Victor Samuel Summerhayes | | 16/9/1958 | K |
| Glebionis segetum | GB, VC106 East Ross & Cromarty, North Kessock | Peter Francis Hunt Victor Samuel Summerhayes | | 6/7/1962 | K |
| Glebionis segetum | GB, VC13 West Sussex, West Chiltington | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | 28/6/1933 | K |
| Glebionis segetum | GB, VC17 Surrey, Wisley | Victor Samuel Summerhayes | | 27/7/1930 | K |
| Glebionis segetum | GB, VC98 Argyllshire, Connel | Victor Samuel Summerhayes | | 16/9/1958 | K |
| Glechoma hederacea | GB, VC17 Surrey, Kew Gardens Cultivated | Victor Samuel Summerhayes | | 23/10/1928 | K |
| Glechoma hederacea | GB, VC71 Isle of Man, Glen Maye | Victor Samuel Summerhayes | | 29/6/1950 | K |
| Glechoma hederacea | GB, VC71 Isle of Man, Glen Maye | Victor Samuel Summerhayes | | 29/6/1950 | K |
| Glechoma hederacea | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 19/4/1935 | K |
| Glechoma hederacea | GB, VC17 Surrey, Fetcham Downs | Victor Samuel Summerhayes William Bertram Turrill | | 4/4/1928 | K |
| Glechoma hederacea | GB, VC17 Surrey, Box Hill | Victor Samuel Summerhayes William Bertram Turrill | | 4/4/1928 | K |
| Glechoma hederacea | GB, VC17 Surrey, Crabtree Cottage | Victor Samuel Summerhayes William Bertram Turrill | | 4/4/1928 | K |
| Glechoma hederacea | GB, VC17 Surrey, Gomshall | Victor Samuel Summerhayes William Bertram Turrill | | 31/5/1927 | K |
| Glechoma hederacea | GB, VC17 Surrey, Gomshall GB, VC17 Surrey, Horsley | Victor Samuel Summerhayes William Bertram Turrill | | 31/5/1927 | K |
| Glechoma hederacea | GB, VC17 Surrey, Crabtree Cottage | Victor Samuel Summerhayes William Bertram Turrill | | 4/4/1928 | K |
| Glechoma hederacea | GB, VC17 Surrey, Horsley | Victor Samuel Summerhayes William Bertram Turrill | | 31/5/1927 | K |
| Glechoma hederacea | GB, VC17 Surrey, Kew | Victor Samuel Summerhayes William Bertram Turrill | | 5/3/1928 | K |
| Glechoma hederacea | GB, VC17 Surrey, Wimbledon Common | Victor Samuel Summerhayes William Bertram Turrill | | 7/2/1928 | K |
| Gnaphalium sylvaticum | GB, VC30 Bedfordshire, Studham | Victor Samuel Summerhayes | | 7/8/1947 | K |
| Groenlandia densa | GB, VC15 East Kent, Hacklinge | Victor Samuel Summerhayes | | 14/6/1949 | K |
| Habenaria albida | GB, VC48 Merionethshire, Benglog Farm | Victor Samuel Summerhayes | | 2/7/1948 | K |
| Habenaria albida | GB, VC70 Cumberland, Gilsland | Victor Samuel Summerhayes | | 29/6/1958 | K |
| Habenaria viride | GB, VC108 West Sutherland, Farr | Peter Francis Hunt Victor Samuel Summerhayes | | 13/7/1962 | K |
| Habenaria viride | GB, VC12 North Hampshire, Winchester | Edgar Wolston Bertram Handsley Milne-Redhead Victor Samuel Summerhayes | | 7/7/1931 | K |
| Habenaria viride | GB, VC67 South Northumberland, Colt Crag reservoir | Victor Samuel Summerhayes | | 3/7/1958 | K |
| Habenaria viride | GB, VC33 East Gloucestershire, Painswick | Victor Samuel Summerhayes | | 26/7/1951 | K |
| Habenaria viride | GB, VC6 North Somerset, Shapwick | Victor Samuel Summerhayes | | 3/6/1954 | K |
| Habenaria viride | IE, VCH30 Co. Cavan, Kilgolagh | Victor Samuel Summerhayes | | 17/8/1961 | K |
| Habenaria viride | GB, VC11 South Hampshire, Upham | Victor Samuel Summerhayes | | 27/8/1957 | K |
| Habenaria viride | GB, VC24 Buckinghamshire, Princes Risborough | Victor Samuel Summerhayes | | 27/6/1957 | K |
| Habenaria viride | GB, VC57 Derbyshire, Buxton | Victor Samuel Summerhayes | | 17/7/1950 | K |
| Habenaria viride | GB, VC7 North Wiltshire, Calne | Victor Samuel Summerhayes | | 23/6/1948 | K |
| Habenaria viride | GB, VC12 North Hampshire, Broughton Down | Victor Samuel Summerhayes | | 28/7/1956 | K |
| Habenaria viride | GB, VC39 Staffordshire, Stanton | Victor Samuel Summerhayes | | 29/6/1947 | K |