| Callitriche brutia | IE, VCH38 Co. Down, Holywood | | Benjamin Thompson Lowne jnr | 1850 | K |
| Callitriche obtusangula | GB, VC16 West Kent, Higham | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 17/6/1923 | K |
| Callitriche stagnalis | GB, VC16 West Kent, Joydens Wood | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 12/6/1901 | K |
| Callitriche stagnalis | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 6/1834 | K |
| Campanula patula | GB Cultivated | Benjamin Thompson Lowne jnr | | 4/3/1938 5/5/1938 to 22/5/1938 | K |
| Carex ericetorum | GB, VC28 West Norfolk, Thetford | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 1/6/1947 | K |
| Chaenorhinum minus | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Chaenorhinum minus | GB, VC28 West Norfolk, Dereham | Robert James Mann | Benjamin Thompson Lowne jnr | 1835 | K |
| Clinopodium ascendens | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Clinopodium ascendens | GB, VC13 West Sussex, Sompting | Benjamin Thompson Lowne jnr | | 25/8/1946 | K |
| Clinopodium ascendens | GB, VC16 West Kent, Shoreham | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 11/8/1901 | K |
| Clinopodium ascendens | GB, VC27 East Norfolk, Buxton | Robert James Mann | Benjamin Thompson Lowne jnr | 1850 | K |
| Clinopodium ascendens | GB, VC27 East Norfolk, Lakenham | Robert James Mann | Benjamin Thompson Lowne jnr | 1835 | K |
| Clinopodium grandiflorum | Cultivated | | Benjamin Thompson Lowne jnr | 1916 | K |
| Clinopodium menthifolium | GB, VC13 West Sussex, Worthing Cultivated GB, VC17 Surrey, Haslemere Cultivated | | Benjamin Thompson Lowne jnr | 31/7/1948 | K |
| Cuscuta epithymum | Cultivated | Benjamin Thompson Lowne jnr | | 8/5/1944 to 21/5/1944 | 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 | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Cymbalaria muralis | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 12/6/1898 | K |
| Dactylis glomerata | | | Benjamin Thompson Lowne jnr | 1908 | 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 ferruginea | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Digitalis ferruginea | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Digitalis grandiflora | | | Benjamin Thompson Lowne jnr | 5/6/1951 20/6/1957 | K |
| Digitalis grandiflora | Cultivated | | 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 | Cultivated | | Benjamin Thompson Lowne jnr | 9/9/1943 7/10/1943 | K |