| Clinopodium menthifolium | GB, VC13 West Sussex, Worthing Cultivated GB, VC17 Surrey, Haslemere Cultivated | | Benjamin Thompson Lowne jnr | 31/7/1948 | K |
| Cuscuta epithymum | GB, VC9 Dorset, Swanage | Benjamin Thompson Lowne snr | Benjamin Thompson Lowne jnr | 1875 | K |
| Cuscuta epithymum | GB, VC9 Dorset, Swanage | | Benjamin Thompson Lowne jnr | 1875 | K |
| Cuscuta epithymum | GB, VC17 Surrey, Shirley | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 7/7/1902 | K |
| Cuscuta epithymum | GB, VC17 Surrey, Shirley Hill | Benjamin Thompson Lowne jnr | | 6/8/1902 | K |
| Cuscuta epithymum | GB, VC27 East Norfolk, Diss | Richard Pearse Libbey | Benjamin Thompson Lowne jnr | 22/9/1945 | K |
| Cuscuta epithymum | GB, VC27 East Norfolk, Saint Faith's | Robert James Mann | Benjamin Thompson Lowne jnr | 8/1834 | K |
| Cuscuta epithymum | GB, Norfolk | | Benjamin Thompson Lowne jnr | | K |
| Cuscuta epithymum | GB, Norfolk, Saint Faith's Bogs | Robert James Mann | Benjamin Thompson Lowne jnr | 8/1837 | K |
| Cymbalaria muralis | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 12/6/1898 | K |
| Dactylis glomerata | GB, VC16 West Kent, Hayes Common | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 21/6/1900 | K |
| Dactylis glomerata | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 1835 | K |
| Dactylis glomerata | GB, Ambiguous locality (GB), Buxton | | Benjamin Thompson Lowne jnr | 1847 | K |
| Dianthus deltoides | GB, VC28 West Norfolk, Brettenham | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 5/9/1909 | K |
| Dianthus deltoides | GB, VC28 West Norfolk, Brettenham | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 5/9/1909 | K |
| Dianthus deltoides | GB, VC28 West Norfolk, Brettenham | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 5/9/1909 | K |
| Dianthus deltoides | GB, VC28 West Norfolk, Brettenham | Benjamin Thompson Lowne jnr | | | K |
| Digitalis lutea | GB, VC17 Surrey, Box Hill | Brenda E Hains | Benjamin Thompson Lowne jnr | 8/7/1947 | K |
| Digitalis purpurea | GB, VC16 West Kent, Darenth Wood | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 7/6/1901 | K |
| Digitalis purpurea | GB, VC16 West Kent, Darenth Wood | Benjamin Thompson Lowne snr | Benjamin Thompson Lowne jnr | 7/6/1901 | K |
| Eruca vesicaria subsp. sativa | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | | 30/7/1905 | SLBI |
| Euphorbia esula | GB, VC17 Surrey, Woldingham | Benjamin Thompson Lowne jnr | Croydon Natural History and Scientific Society | 22/7/1900 | SLBI |
| Euphorbia hyberna | GB, VC10 Isle of Wight, Cowes Cultivated | Benjamin Thompson Lowne jnr | | 8/1935 | SLBI |
| Fallopia convolvulus | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | Allan Octavian Hume | 1902 | SLBI |
| Festuca arundinacea | GB, VC13 West Sussex, Fishbourne | | Benjamin Thompson Lowne jnr | 14/7/1944 | K |
| Festuca arundinacea | GB, VC15 East Kent, Dover | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 11/6/1903 | K |
| Festuca arundinacea | GB, VC15 East Kent, Pegwell Bay | Benjamin Thompson Lowne jnr | | 4/7/1901 | K |
| Galeopsis angustifolia | GB, VC15 East Kent, Farleigh | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 11/8/1907 | K |
| Galeopsis angustifolia | GB, VC16 West Kent, Keston | Benjamin Thompson Lowne jnr | | 8/1899 | K |
| Galeopsis segetum | GB, VC16 West Kent, Catford Cultivated | Benjamin Thompson Lowne jnr | | 9/8/1914 | K |
| Galeopsis segetum | GB, VC49 Caernarvonshire Cultivated | | Benjamin Thompson Lowne jnr | 10/8/1907 | K |
| Galeopsis tetrahit | GB, VC16 West Kent, Bickley | Benjamin Thompson Lowne jnr | | 8/1899 | K |
| Galeopsis tetrahit | GB, VC16 West Kent, Cudham | Benjamin Thompson Lowne jnr | | 8/1899 | K |
| Gentiana verna | GB, VC59 South Lancashire, Liverpool | Allan Octavian Hume | Benjamin Thompson Lowne jnr | 28/9/1905 | K |
| Gentianella campestris | GB, VC27 East Norfolk, Saint Fays Marshes | | Benjamin Thompson Lowne jnr Benjamin Thompson Lowne snr | 1837 | K |
| Gentianella campestris | GB, VC59 South Lancashire, Liverpool GB, VC59 South Lancashire, Southport | Allan Octavian Hume | Benjamin Thompson Lowne jnr | 28/9/1905 | K |
| Glechoma hederacea | GB, VC22 Berkshire, Newbury | Albert Bruce Jackson | Benjamin Thompson Lowne jnr | | K |
| Glechoma hederacea | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 4/1835 | K |
| Gnaphalium sylvaticum | GB, VC13 West Sussex, West Chiltington | Benjamin Thompson Lowne jnr | | 4/9/1936 | K |
| Groenlandia densa | GB, VC16 West Kent, Holwood | Benjamin Thompson Lowne jnr | | 28/6/1900 | K |