| Verbascum densiflorum | GB, VC13 West Sussex, Worthing | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 24/7/1946 | K |
| Verbascum blattaria | GB, VC27 East Norfolk, Thorpe | Robert James Mann | Benjamin Thompson Lowne jnr Robert James Mann | 1835 | K |
| Torilis arvensis | GB, VC13 West Sussex, Sompting | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 6/9/1936 | K |
| Torilis arvensis | GB, VC27 East Norfolk, Thorpe | | Benjamin Thompson Lowne jnr Robert James Mann | 1835 | K |
| Thymus serpyllum | GB, VC16 West Kent, Downe | Benjamin Thompson Lowne jnr | | 7/1899 | K |
| Thymus chamaedrys | GB, VC13 West Sussex, Bow Hill | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 20/9/1948 | K |
| Thymus chamaedrys | GB, VC13 West Sussex, Lavant | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 20/9/1948 | K |
| Thymus | GB, VC4 North Devon, Hunters Inn | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 19/8/1910 | K |
| Thymus | GB, VC17 Surrey, Mickleham Downs | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 21/6/1919 | K |
| Thymus | GB, VC65 North-west Yorkshire, Scaurberry Bridge [Scoberry Bridge] | | Benjamin Thompson Lowne jnr | 24/6/1920 | K |
| Thesium | GB, VC14 East Sussex, Eastbourne | Milner | Benjamin Thompson Lowne jnr | 19/6/1906 | SLBI |
| Teucrium chamaedrys | GB, VC14 East Sussex, Camber Castle | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 8/7/1950 | K |
| Teucrium chamaedrys | GB, VC27 East Norfolk, Norwich | Robert James Mann | Benjamin Thompson Lowne jnr | 9/1837 | K |
| Teucrium botrys | GB, VC17 Surrey, Farleigh | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 7/1900 | K |
| Tephroseris integrifolia | GB, VC12 North Hampshire, Winchester, Saint Catherine's Hill | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 11/6/1909 | K |
| Stellaria palustris | GB, VC13 West Sussex, Amberley Wild Brooks | Benjamin Thompson Lowne jnr | | 1/7/1934 | K |
| Stellaria palustris | GB, VC27 East Norfolk, Postwick | Robert James Mann | Benjamin Thompson Lowne jnr | 1834 | K |
| Stachys sylvatica | GB, VC16 West Kent, Bickley | Benjamin Thompson Lowne jnr | | 7/1899 | K |
| Stachys palustris | GB, VC11 South Hampshire, Matley Bog | Henry Dixon Hewitt | Benjamin Thompson Lowne jnr | 12/8/1901 | K |
| Stachys officinalis | GB, VC16 West Kent, Chelsfield | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 18/7/1914 | K |
| Stachys officinalis | GB, VC16 West Kent, Keston, Holwood Park | Benjamin Thompson Lowne jnr | | 7/1898 | K |
| Stachys officinalis | GB, Essex, Chelmsford | | Benjamin Thompson Lowne jnr | 1836 | K |
| Stachys officinalis | GB, VC66 County Durham, Teesdale | Constance L Wilde | Benjamin Thompson Lowne jnr | 24/7/1919 | 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 | GB, VC16 West Kent, Crofton, Orpington | Benjamin Thompson Lowne jnr | Benjamin Thompson Lowne jnr | 19/9/1903 | 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 | 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 | 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 | 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 |