| 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 | 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 | GB, VC63 South-west Yorkshire, Doncaster | Oswald Allen Moore | Benjamin Thompson Lowne jnr | 1850 | K |
| Scrophularia umbrosa | GB, VC14 East Sussex, Wannock Glen | Allan Octavian Hume | Benjamin Thompson Lowne jnr | 7/9/1907 | K |
| Scrophularia scorodonia | GB, VC1 West Cornwall, Newquay Cultivated | Charles Baylis Green | Benjamin Thompson Lowne jnr | 29/7/1900 | K |
| Scrophularia nodosa | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 7/1834 | K |
| Scrophularia nodosa | GB, VC66 County Durham, Bowlees | | Benjamin Thompson Lowne jnr | 29/6/1920 | K |
| Scrophularia auriculata | GB, VC18 South Essex, Southend | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 6/1900 | K |
| Scleranthus annuus | GB, VC9 Dorset, Swanage | | Benjamin Thompson Lowne jnr | 1875 | K |
| Scleranthus annuus | GB, VC16 West Kent, Bellingham | Benjamin Thompson Lowne jnr | | 10/1898 | K |
| Scleranthus annuus | GB, VC27 East Norfolk, Carrow | Robert James Mann | Benjamin Thompson Lowne jnr | 1835 | K |
| Satureja montana | GB, VC13 West Sussex, Worthing Cultivated | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 21/8/1951 | K |
| Salvia pratensis | GB, VC16 West Kent, Cobham Cultivated | Benjamin Thompson Lowne jnr | Croydon Natural History and Scientific Society Henry Franklin Parsons | 5/6/1904 | SLBI |
| Ranunculus sardous | GB, VC17 Surrey, Horley | Benjamin Thompson Lowne jnr | Allan Octavian Hume | 23/5/1904 | SLBI |
| Ranunculus arvensis | GB, VC25 East Suffolk, Lowestoft | Robert James Mann | Benjamin Thompson Lowne jnr | 1835 | K |
| Plantago ramosa | GB, VC16 West Kent, Sundridge | Benjamin Thompson Lowne jnr | Allan Octavian Hume | 29/8/1903 | SLBI |
| Plantago media | GB, VC15 East Kent, Margate GB, VC16 West Kent, Leeves Green | Benjamin Thompson Lowne jnr | | 6/1900 | K |
| Plantago maritima | GB, VC15 East Kent, Pegwell Bay | Benjamin Thompson Lowne snr | Benjamin Thompson Lowne jnr | 7/7/1901 | K |
| Plantago maritima | GB, VC52 Anglesey, Beaumaris | | Benjamin Thompson Lowne jnr | 19/8/1912 | K |
| Plantago maritima | GB, VC52 Anglesey, Beaumaris | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 19/8/1912 | K |
| Plantago major subsp. major | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | | 8/1899 | K |
| Plantago major subsp. major | GB, VC18 South Essex, Dagenham Dock Cultivated | R S Vine | Benjamin Thompson Lowne jnr | 6/1933 | K |
| Plantago major subsp. major | GB, VC18 South Essex, Dagenham Dock | R S Vine | Benjamin Thompson Lowne jnr | 7/1933 | K |
| Plantago major subsp. major | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 1834 | K |
| Plantago lanceolata | GB, VC9 Dorset, Swanage | | Benjamin Thompson Lowne jnr | | K |
| Plantago lanceolata | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | | 6/1900 | K |
| Plantago lanceolata | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | | 6/1900 | K |
| Plantago lanceolata | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 1834 | K |
| Plantago lanceolata | GB, VC28 West Norfolk, Santon Warren | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 8/7/1944 | K |
| Plantago coronopus | GB, VC9 Dorset, Swanage | | Benjamin Thompson Lowne jnr | | K |
| Plantago coronopus | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr | 1834 | K |
| Plantago arenaria | GB, VC13 West Sussex, Worthing | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 25/5/1944 | K |
| Plantago arenaria | GB, VC16 West Kent, Catford Cultivated GB, VC16 West Kent, Sundridge Park | Rudolf Beer | Benjamin Thompson Lowne jnr | 19/9/1908 | K |
| Plantago arenaria | GB, VC16 West Kent, Sundridge Cultivated | Rudolf Beer | Benjamin Thompson Lowne jnr | 1907 19/9/1908 | K |
| Plantago afra | GB, VC25 East Suffolk, Lowestoft | | Benjamin Thompson Lowne jnr F Baker | 1907 | K |
| Plantago | GB, VC16 West Kent, Catford | Benjamin Thompson Lowne jnr | | 8/1899 | K |