| Salix cinerea x phylicifolia = S. x laurina | | John Ewbank Leefe | Charles Bailey | 19/5/1869 25/9/1869 | MANCH |
| Salix cinerea x phylicifolia = S. x laurina | | John Ewbank Leefe | Charles Bailey John Ray Hardy | 19/5/1869 to 25/9/1869 | MANCH |
| Salix viminalis x caprea x cinerea = S. x calodendron | | John Ewbank Leefe | Charles Bailey John Ray Hardy | 21/4/1869 to 11/9/1869 | MANCH |
| Salix viminalis x caprea x cinerea = S. x calodendron | | John Ewbank Leefe | Charles Bailey | 1869 21/4/1869 | MANCH |
| Salix viminalis x cinerea = S. x holosericea | | | Charles Bailey John Ewbank Leefe | 12/5/1866 to 3/9/1867 | MANCH |
+ | Salix aurita x repens x herbacea = S. x grahamii | GB, VC108 West Sutherland, Foinaven | John Ewbank Leefe John Thomas Irvine Boswell-Syme | Charles Bailey | 6/1881 | MANCH |
| Salix aurita | GB, Ambiguous locality (GB), Bangor | | John Ewbank Leefe William Hadden Beeby | | SLBI |
| Salix aurita x repens x herbacea = S. x grahamii | GB, VC85 Fifeshire, Balmuto Cultivated | John Ewbank Leefe John Thomas Irvine Boswell-Syme | Charles Bailey | 5/1881 | 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 caprea x aurita = S. x stipularis | GB, VC85 Fifeshire, Balmuto Cultivated | John Ewbank Leefe | Augustin Ley John Thomas Irvine Boswell-Syme | 10/1877 | BIRM |
| Lamium confertum | GB, VC83 Midlothian, Edinburgh | | Botanical Society of Edinburgh John Ewbank Leefe Nicholas Tyacke | 1836 | K |
| 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 |
| Lamium confertum | GB, VC72 Dumfriesshire, Brownhall | | Botanical Society of Edinburgh John Ewbank Leefe James Cruickshank | 9/1839 | K |
+ | Cerastium alpinum | GB, VC69,VC70, Helvellyn, Striding Edge | John Ewbank Leefe | Charles Bailey James Ward | | MANCH |
| Salix purpurea | GB, Northumberland, Rothbury | John Ewbank Leefe | William Hadden Beeby | 2/5/1876 8/6/1876 | SLBI |
| Salix purpurea x cinerea = S. x pontederiana | GB, Northumberland, Rothbury | Arthur Bennett John Ewbank Leefe | Botanical Exchange Club of The British Isles Augustin Ley | | BIRM |
| Salix purpurea x viminalis = S. x rubra | GB, Northumberland, Rothbury | John Ewbank Leefe | Augustin Ley | | BIRM |
| 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, VC68 North Northumberland, Harehope | | John Ewbank Leefe William Hadden Beeby | | SLBI |
+ | Salix purpurea x aurita = S. x dichroa | GB, VC67 South Northumberland, Rothbury | John Ewbank Leefe | Charles Bailey | | MANCH |
+ | Salix purpurea x cinerea = S. x pontederiana | GB, VC67 South Northumberland, Rothbury | Arthur Bennett John Ewbank Leefe | Charles Bailey | | MANCH |
| 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 |
| Carex capillaris | GB, VC66 County Durham, Teesdale,Widdybank | John Ewbank Leefe | | 1836 | E |
| Carex capillaris | GB, VC66 County Durham, Teesdale, Widdybank Fell | John Ewbank Leefe | | 1836 | E |
| Salix cinerea subsp. oleifolia | GB, VC65 North-west Yorkshire, Richmond | John Ewbank Leefe | Donor Unknown | 9/4/1842 to 4/7/1842 | BIRM |
| Salix viminalis x caprea = S. x smithiana | GB, VC65 North-west Yorkshire, Richmond | James Ward | Charles Cardale Babington John Ewbank Leefe | 7/4/1842 27/6/1842 9/7/1842 | CGE |
| Salix viminalis x caprea = S. x smithiana | GB, VC65 North-west Yorkshire, Richmond | James Ward | Charles Cardale Babington John Ewbank Leefe | 11/5/1842 6/8/1842 | CGE |
| Salix viminalis x caprea = S. x smithiana | GB, VC65 North-west Yorkshire, Richmond | James Ward | Charles Cardale Babington John Ewbank Leefe | 25/3/1842 21/6/1842 | CGE |
| Salix viminalis x caprea = S. x smithiana | GB, VC65 North-west Yorkshire, Richmond | James Ward | Charles Cardale Babington John Ewbank Leefe | 9/4/1842 23/7/1842 | CGE |
| Salix viminalis x cinerea = S. x holosericea | GB, VC65 North-west Yorkshire, Richmond | James Ward John Ewbank Leefe | Chenevix-Trench | 9/4/1842 4/7/1842 | MANCH |
| 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 |
| Carex diandra | GB, VC65 North-west Yorkshire, Halnaby | | John Ewbank Leefe | 6/1866 | E |
| Salix pentandra | GB, VC65 North-west Yorkshire, Gilling | James Ward | John Ewbank Leefe | 2/6/1842 | SLBI |
| Salix fragilis x alba = S. x rubens | GB, VC65 North-west Yorkshire, Easby | James Ward | Charles Cardale Babington John Ewbank Leefe | 4/5/1842 16/7/1842 | CGE |
| Teucrium scordium | GB, VC65 North-west Yorkshire, Bolton on Swale | | Richard Chandler Alexander Prior John Ewbank Leefe | 1837 | K |
| Carex otrubae | GB, VC50 Denbighshire, Chirk | John Ewbank Leefe | John Ewbank Leefe | | E |
| Callitriche intermedia | GB, VC49 Caernarvonshire, Llyn Llydaw | | John Ewbank Leefe | 6/1887 | K |