| Salix pentandra | GB, VC65 North-west Yorkshire, Gilling | James Ward | John Ewbank Leefe | 2/6/1842 | SLBI |
| 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 |
| Salix fragilis x alba = S. x rubens | GB, Essex Cultivated | John Ewbank Leefe | | 28/4/1868 26/4/1869 | CGE |
| Salix viminalis x caprea = S. x smithiana | | John Ewbank Leefe | Liverpool University | 21/4/1866 10/10/1868 | LIV |
| Salix fragilis var. britannicum | | | John Ewbank Leefe William Hadden Beeby | 7/5/1874 | SLBI |
| Salix herbacea x nigricans = S. x moorei | | | John Ewbank Leefe William Hadden Beeby | 9/5/1876 | SLBI |
| Salix cinerea subsp. oleifolia | | Arthur Bennett John Ewbank Leefe | Botanical Exchange Club of The British Isles Augustin Ley | | BIRM |
| 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 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 |
| Salix x mollissima var. hippophaefolia | | Arthur Bennett John Ewbank Leefe | Botanical Exchange Club of The British Isles Augustin Ley | | BIRM |
| Salix x mollissima var. hippophaefolia | GB, VC36 Herefordshire, Ross | John Ewbank Leefe | Augustin Ley | 1/4/1882 26/6/1882 | BIRM |
| Callitriche intermedia | GB, VC49 Caernarvonshire, Llyn Llydaw | | John Ewbank Leefe | 6/1887 | K |
| Callitriche stagnalis | GB, VC66 County Durham, Widdybank Fell, Teesdale | | John Ewbank Leefe | 8/1872 | K |
| Campanula patula | GB, VC38 Warwickshire, Allesley | | John Ewbank Leefe | 6/1887 | K |
| Carex acutiformis | GB, VC19 North Essex, Audley End | John Ewbank Leefe | John Ewbank Leefe | 15/5/1879 | E |
| Carex arenaria | GB, VC29 Cambridgeshire, Cambridge | | John Ewbank Leefe | 5/1833 | E |
| 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 |
| Carex depauperata | GB, VC17 Surrey, Frith Hill, Godalming | Arthur Bennett | John Ewbank Leefe Royal Botanic Gardens, Kew | 6/1874 | E |
| Carex diandra | GB, VC65 North-west Yorkshire, Halnaby | | John Ewbank Leefe | 6/1866 | E |
| Carex dioica | GB, VC29 Cambridgeshire, Gamlingay | John Ewbank Leefe | | | E |
| Carex dioica | GB, VC66 County Durham, Widdybank Fell, Teesdale | John Ewbank Leefe | | 1836 | E |
| Carex hirta | GB, VC65 North-west Yorkshire, Kirkby Fleetham | John Ewbank Leefe | Royal Botanic Gardens, Kew | | E |
| Carex otrubae | GB, VC50 Denbighshire, Chirk | John Ewbank Leefe | John Ewbank Leefe | | E |
| Carex panicea | | John Ewbank Leefe | | 1836 | E |
| Carex paniculata | GB, VC19 North Essex, Audley End | John Ewbank Leefe | | 15/5/1839 | E |
| Carex riparia | GB, VC19 North Essex, Audley End | John Ewbank Leefe | | 15/5/1839 | E |
| Carex rostrata | GB, VC65 North-west Yorkshire, Kirkby Fleetham | | John Ewbank Leefe Royal Botanic Gardens, Kew | | E |
| Consolida regalis | GB, VC19 North Essex, Audley End | | John Ewbank Leefe | 1840 | MANCH |
| Salix alba var. caerulea | | John Ewbank Leefe | John Ewbank Leefe | | SLBI |
| Salix alba subsp. vitellina | | John Ewbank Leefe | John Ewbank Leefe William Hadden Beeby | 15/5/1874 14/9/1874 | SLBI |
| Salix arbuscula | | John Ewbank Leefe | William Hadden Beeby | 7/5/1874 | SLBI |
| Salix arbuscula | | John Ewbank Leefe | William Hadden Beeby | | SLBI |
| Salix aurita | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Donor Unknown | 3/4/1842 19/7/1842 | BIRM |
| Salix aurita | GB, Ambiguous locality (GB), Bangor | | John Ewbank Leefe William Hadden Beeby | | SLBI |
| Salix cinerea subsp. oleifolia | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Donor Unknown | 5/4/1842 12/8/1842 | BIRM |
| Salix cinerea subsp. oleifolia | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Donor Unknown | 4/4/1842 to 14/7/1842 | BIRM |
| Salix cinerea subsp. oleifolia | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Donor Unknown | 6/4/1842 22/7/1842 | BIRM |
| Salix cinerea subsp. oleifolia | GB, VC19 North Essex, Audley End | John Ewbank Leefe | Donor Unknown | 28/3/1842 23/7/1842 | BIRM |