| Stachys officinalis | GB, VC66 County Durham, Teesdale | Constance L Wilde | Benjamin Thompson Lowne jnr | 24/7/1919 | K |
| Stachys germanica | | | Benjamin Thompson Lowne jnr | | K |
| Stachys germanica | GB, VC13 West Sussex, Worthing Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 3/8/1936 | K |
| Stachys germanica | GB, VC16 West Kent, Catford Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 22/7/1919 | K |
| Stachys arvensis | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Stachys arvensis | GB, VC16 West Kent, Crofton, Orpington | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 19/9/1903 | K |
| Stachys annua | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Stachys annua | GB, VC13 West Sussex, Worthing | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 31/10/1937 | K |
| Stachys annua | GB, VC16 West Kent, Bromley | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 23/9/1905 | K |
| Stachys alpina | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Stachys alpina | GB, VC13 West Sussex, Worthing Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 11/7/1937 | K |
| Spinacia oleracea | GB, Ambiguous locality (GB), Worthing | Benjamin Thompson Lowne jnr | | 8/1935 | SLBI |
| Sium latifolium | Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 1908 | K |
| Sium latifolium | Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 1908 | K |
| Sium latifolium | GB, VC16 West Kent, Catford Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 28/9/1908 | K |
| Sium latifolium | GB, VC16 West Kent, Catford Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 28/9/1908 | K |
| Sium latifolium | GB, VC16 West Kent, Farnborough | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 4/8/1905 | K |
| Sium latifolium | GB, VC26 West Suffolk, Lakenheath | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 25/7/1908 to 3/10/1908 | K |
| Sium latifolium | GB, VC27 East Norfolk, Oby | Robert James Mann | Benjamin Thompson Lowne jnr | 7/1833 | K |
| Silene conica | Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 27/5/1924 | K |
| Silene conica | Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 12/5/1915 | K |
| Silene conica | GB, VC15 East Kent, Deal,Sandown Castle | Dawson Turner | Benjamin Thompson Lowne jnr | 1836 | K |
| Silene conica | GB, VC26 West Suffolk, Elveden | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 9/11/1907 | K |
| Silene conica | GB, VC28 West Norfolk, Weeting | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 3/6/1907 | K |
| Silene conica | GB, Norfolk, Weeting | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 3/6/1907 | K |
| Silene armeria | GB, VC16 West Kent, Catford Cultivated | Benjamin Thompson Lowne jnr | Allan Octavian Hume | 20/7/1908 | SLBI |
| Sibthorpia europaea | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Sibthorpia europaea | Cultivated | | Benjamin Thompson Lowne jnr | | K |
| Sibthorpia europaea | GB, VC14 East Sussex, Herstmonceux | Benjamin Thompson Lowne jnr | | 27/7/1938 | K |
| Scutellaria minor | GB, VC16 West Kent, Keston | Benjamin Thompson Lowne jnr | | 8/1898 | K |
| Scutellaria galericulata | Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | | K |
| Scutellaria galericulata | Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | | K |
| Scutellaria galericulata | GB, VC12 North Hampshire, Fleet Pond | Benjamin Thompson Lowne jnr | | 7/8/1915 | K |
| Scutellaria galericulata | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | | 9/1898 | K |
| Scutellaria galericulata | GB, VC21 Middlesex, Uxbridge | | Benjamin Thompson Lowne jnr | | K |
| Scutellaria galericulata | GB, VC21 Middlesex, Willesden | | Benjamin Thompson Lowne jnr | | K |
| Scrophularia vernalis | Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | | K |
| Scrophularia vernalis | Cultivated | | Benjamin Thompson Lowne jnr | 4/5/1913 | K |
| Scrophularia vernalis | Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 9/4/1910 4/5/1910 23/5/1910 | K |
| Scrophularia vernalis | GB, VC63 South-west Yorkshire, Doncaster | Oswald Allen Moore | Benjamin Thompson Lowne jnr | 1850 | K |