| Salix viminalis x caprea = S. x smithiana | GB, VC19 North Essex, Audley End | John Ewbank Leefe | John Stevens Henslow | 7/5/1842 | CGE |
| Salix viminalis x caprea = S. x smithiana | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Donor Unknown | 9/7/1842 | BIRM |
| Salix viminalis x caprea = S. x smithiana | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Donor Unknown | 19/7/1842 | BIRM |
| Salix viminalis x caprea x cinerea = S. x calodendron | GB, VC19 North Essex, Audley End | John Ewbank Leefe | | 18/8/1842 | BIRM |
| Salix viminalis x caprea x cinerea = S. x calodendron | GB, VC19 North Essex, Audley End | John Ewbank Leefe | | 18/8/1842 | MANCH |
| Salix fragilis x alba = S. x rubens | GB, Essex Cultivated | John Ewbank Leefe | | 20/8/1868 8/5/1869 26/8/1869 | MANCH |
| Salix fragilis x alba = S. x rubens | GB, Essex | John Ewbank Leefe | | 25/4/1869 8/5/1869 26/8/1869 28/8/1869 | CGE |
| Carex arenaria | GB, VC29 Cambridgeshire, Cambridge | | John Ewbank Leefe | 5/1833 | E |
| Salix repens var. rosmannifolia | GB, VC29 Cambridgeshire, Cambridge Botanic Gardens | John Ewbank Leefe | | | SLBI |
| Salix repens | GB, VC29 Cambridgeshire, Cambridge Botanic Gardens Cultivated | John Ewbank Leefe | William Hadden Beeby | 14/5/1867 15/8/1867 | SLBI |
| Carex dioica | GB, VC29 Cambridgeshire, Gamlingay | John Ewbank Leefe | | | E |
| Campanula patula | GB, VC38 Warwickshire, Allesley | | John Ewbank Leefe | 6/1887 | K |
| Salix purpurea | GB, VC39 Staffordshire, Bilbrook | John Ewbank Leefe | Botanical Exchange Club of The British Isles William Hadden Beeby | 12/5/1867 24/8/1867 | SLBI |
| Callitriche intermedia | GB, VC49 Caernarvonshire, Llyn Llydaw | | John Ewbank Leefe | 6/1887 | K |
| Carex otrubae | GB, VC50 Denbighshire, Chirk | John Ewbank Leefe | John Ewbank Leefe | | E |
| Teucrium scordium | GB, VC65 North-west Yorkshire, Bolton on Swale | | Richard Chandler Alexander Prior John Ewbank Leefe | 1837 | K |
| Carex diandra | GB, VC65 North-west Yorkshire, Halnaby | | John Ewbank Leefe | 6/1866 | E |
| Carex hirta | GB, VC65 North-west Yorkshire, Kirkby Fleetham | John Ewbank Leefe | Royal Botanic Gardens, Kew | | E |
| Carex rostrata | GB, VC65 North-west Yorkshire, Kirkby Fleetham | | John Ewbank Leefe Royal Botanic Gardens, Kew | | E |
| Salix cinerea subsp. oleifolia | GB, VC65 North-west Yorkshire, Richmond | John Ewbank Leefe | Donor Unknown | 9/4/1842 to 4/7/1842 | BIRM |
| Carex capillaris | GB, VC66 County Durham, Teesdale, Widdybank Fell | John Ewbank Leefe | | 1836 | E |
| Carex capillaris | GB, VC66 County Durham, Teesdale,Widdybank | John Ewbank Leefe | | 1836 | E |
| Callitriche stagnalis | GB, VC66 County Durham, Widdybank Fell, Teesdale | | John Ewbank Leefe | 8/1872 | K |
| Carex dioica | GB, VC66 County Durham, Widdybank Fell, Teesdale | John Ewbank Leefe | | 1836 | E |
| Salix purpurea | GB, VC68 North Northumberland, Harehope | | John Ewbank Leefe William Hadden Beeby | | SLBI |
| Salix pentandra x fragilis = S. x meyeriana | GB, VC68 North Northumberland, Rothbury | John Ewbank Leefe | IRGMA Arthur Bennett | 5/1870 to 8/1870 | LIV |
| Salix purpurea | GB, Northumberland, Rothbury | John Ewbank Leefe | William Hadden Beeby | 2/5/1876 8/6/1876 | SLBI |
| Salix myrsinites | GB, VC83 Midlothian, Edinburgh | | John Ewbank Leefe William Hadden Beeby | 28/8/1876 | SLBI |
| Salix myrsinities var. procumbens | GB, VC83 Midlothian, Edinburgh | | John Ewbank Leefe William Hadden Beeby | | SLBI |
| Salix aurita | GB, Ambiguous locality (GB), Bangor | | John Ewbank Leefe William Hadden Beeby | | SLBI |
| Salix viminalis x cinerea = S. x holosericea | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Chenevix-Trench | 9/7/1842 | MANCH |
| Salix bakeri | GB, VC85 Fifeshire, Balmuto Cultivated | John Thomas Irvine Boswell-Syme | William Hadden Beeby John Ewbank Leefe | 8/1877 | SLBI |
| Salix viminalis x cinerea = S. x holosericea | GB, VC14 East Sussex, Lewes | John Ewbank Leefe | Arthur Bennett Arthur Waters Preston Charles Bailey | 5/4/1875 | MANCH |
| Salix viminalis x cinerea = S. x holosericea | GB, VC17 Surrey, Croydon Cultivated | John Ewbank Leefe | Charles Bailey Arthur Bennett | | MANCH |
| Consolida regalis | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Richmond Museum Charles Bailey James Ward | 6/1840 | MANCH |
+ | Pulsatilla vulgaris | GB, VC29 Cambridgeshire, Cambridge | John Ewbank Leefe | Charles Bailey James Ward | 4/1840 | MANCH |
| Salix aurita x myrsinifolia = S. x coriacea | GB, VC29 Cambridgeshire, Cambridge Botanic Gardens Cultivated | John Ewbank Leefe | Charles Bailey | 20/4/1867 14/4/1868 7/8/1868 | MANCH |
| Salix aurita x myrsinifolia = S. x coriacea | GB, VC29 Cambridgeshire, Cambridge Botanic Gardens Cultivated | John Ewbank Leefe | Charles Bailey | 20/4/1867 14/4/1868 7/8/1868 | MANCH |
| Salix aurita x myrsinifolia = S. x coriacea | GB, VC29 Cambridgeshire, Cambridge Botanic Gardens Cultivated | John Ewbank Leefe | Charles Bailey | 20/4/1867 14/4/1868 7/8/1868 | MANCH |
| Salix aurita x myrsinifolia = S. x coriacea | GB, VC29 Cambridgeshire, Cambridge Botanic Gardens Cultivated | John Ewbank Leefe | Richmond Museum Charles Bailey James Ward | 20/4/1867 14/4/1868 7/8/1868 | MANCH |