| Habenaria albida | GB, VC48 Merionethshire, Corris Uchaf | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 16/6/1924 | K |
| Habenaria albida | GB, VC48 Merionethshire, Corris Uchaf, Tap Du | Benjamin Thompson Lowne jnr | | 22/6/1922 | K |
| Habenaria albida | GB, VC85 Fifeshire, Dunfermline | Dewar | Benjamin Thompson Lowne jnr | | K |
| Habenaria viride | GB, VC14 East Sussex, Eastbourne | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 8/6/1906 | K |
| Habenaria viride | GB, VC15 East Kent, Dover | James Alexander Brewer | Benjamin Thompson Lowne jnr | 6/1852 | K |
| Habenaria viride | GB, VC25 East Suffolk, Bungay | | Benjamin Thompson Lowne jnr | 1835 | K |
| Habenaria viride | GB, VC50 Denbighshire, Minera Mountain | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 20/6/1903 | K |
| Habenaria viride | GB, VC57 Derbyshire, Longstone Edge | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 20/8/1914 | K |
| Herminium monorchis | GB, VC13 West Sussex, Chanctonbury Ring | Benjamin Thompson Lowne jnr | | 12/7/1946 | K |
| Herminium monorchis | GB, VC16 West Kent, Chevening | Henry Lascelles Jenner | Benjamin Thompson Lowne jnr | 7/1845 | K |
| Herminium monorchis | GB, VC17 Surrey, Box Hill | Benjamin Thompson Lowne jnr | | 10/7/1904 | K |
| Herminium monorchis | GB, VC17 Surrey, Mickleham | | Brewer Benjamin Thompson Lowne jnr | 7/1862 | K |
| Hippocrepis comosa | GB, VC17 Surrey, Farnham | Benjamin Thompson Lowne jnr | Allan Octavian Hume | 27/5/1901 | SLBI |
| Hordeum marinum | GB, VC25 East Suffolk, Lowestoft | | Benjamin Thompson Lowne jnr | 1835 | K |
| Hypericum | GB, VC16 West Kent, Keston | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 11/8/1898 | K |
| Hypochaeris glabra | GB, VC26 West Suffolk, Thetford warren | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 11/6/1922 | K |
| Hypochaeris glabra | GB, VC28 West Norfolk, Santon Warren | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 24/9/1910 | K |
| Kickxia elatine subsp. elatine | GB, VC16 West Kent, Bickley GB, VC16,VC17, West Wickham | Benjamin Thompson Lowne jnr | | 7/1899 | K |
| Kickxia elatine subsp. elatine | GB, VC27 East Norfolk, Blofield | Robert James Mann | Benjamin Thompson Lowne jnr | 9/1834 | K |
| Kickxia elatine subsp. elatine | GB, VC28 West Norfolk, Shernborne | | Benjamin Thompson Lowne jnr | 1865 | K |
| Kickxia spuria | GB, VC13 West Sussex, Edburton | Benjamin Thompson Lowne jnr | | 4/8/1949 | K |
| Lamium album | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | | 5/1898 | K |
| Lamium amplexicaule | GB, VC15 East Kent, Broadstairs | Benjamin Thompson Lowne jnr | | 6/1899 | K |
| Lamium amplexicaule | GB, VC27 East Norfolk, Hevingham | Robert James Mann | Benjamin Thompson Lowne jnr | 1835 | K |
| Lamium amplexicaule | GB, VC27 East Norfolk, Whitlingham | Robert James Mann | Benjamin Thompson Lowne jnr | 1835 | K |
| Lamium amplexicaule | GB, VC28 West Norfolk, Weeting | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 29/4/1944 | K |
| Lamium galeobdolon subsp. montanum | GB, VC16 West Kent, West Wickham | | Benjamin Thompson Lowne jnr | 5/1898 | K |
| Lamium galeobdolon subsp. montanum | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 1834 | K |
| Lamium maculatum | GB, VC13 West Sussex, Henfield | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 5/6/1935 | K |
| Lamium maculatum | GB, VC13 West Sussex, Henfield | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 25/6/1936 | K |
| Lamium maculatum | GB, VC17 Surrey, Stoats Nest | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 8/1900 | K |
| Lamium purpureum var. purpureum | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | | 4/1898 | K |
| Lamium purpureum var. hybridum | GB, VC21 Middlesex, Hayes | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 17/5/1922 | K |
| Lamium purpureum var. purpureum | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 4/1835 | K |
| Lathyrus aphaca | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | Allan Octavian Hume | 27/5/1900 | SLBI |
| Lathyrus grandiflorus | GB, VC16 West Kent, Catford Cultivated | Benjamin Thompson Lowne jnr | Allan Octavian Hume William Henry Griffin | 18/6/1910 | SLBI |
| Leonurus cardiaca | GB, VC16 West Kent, Catford Cultivated | Benjamin Thompson Lowne jnr | | 1907 | K |
| Leonurus cardiaca | GB, VC16 West Kent, Catford Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 25/7/1909 | K |
| Ligustrum vulgare | GB, VC16 West Kent, Catford GB, VC16 West Kent, Keston | | Benjamin Thompson Lowne jnr | 7/1899 | K |
| Ligustrum vulgare | GB, VC27 East Norfolk, Norwich | Robert James Mann | Benjamin Thompson Lowne jnr | 7/1834 | K |