| Populus | GB, VC29 Cambridgeshire, Gamlingay Wood | William West | George Stephen West | 5/6/1895 | BIRM |
| Populus alba | GB, VC6 North Somerset, Burnham | Martha Maria Atwood | Donor Unknown | 8/1853 | BIRM |
| Populus alba | GB, VC6 North Somerset, Burnham-on-Sea | Augustin Ley | Augustin Ley | 24/9/1910 | BIRM |
| Populus alba | GB, VC19 North Essex, Hatfield Forest | Douglas Montague Heath | Douglas Montague Heath | 4/1912 | BIRM |
| Populus alba | GB, VC28 West Norfolk, East Walton | Douglas Montague Heath | Douglas Montague Heath | 3/5/1915 | BIRM |
| Populus alba | GB, VC32 Northamptonshire, Geddington Chase | Augustin Ley | Augustin Ley | 1/8/1910 | BIRM |
| Populus alba | GB, VC32 Northamptonshire, Kings Sutton | Robert Large Baker | | 1874 | BIRM |
| Populus alba | GB, VC35 Monmouthshire, Graig | Augustin Ley | Augustin Ley | 10/10/1883 | BIRM |
| Populus alba | GB, VC36 Herefordshire, Cradley | Augustin Ley | Augustin Ley | 28/8/1883 | BIRM |
| Populus alba | GB, VC36 Herefordshire, King's Caple | Augustin Ley | Augustin Ley | 10/6/1872 | BIRM |
| Populus alba | GB, VC36 Herefordshire, King's Caple | | Augustin Ley | 4/3/1895 | BIRM |
| Populus alba | GB, VC36 Herefordshire, Linton | Augustin Ley | Augustin Ley | 26/7/1879 | BIRM |
| Populus alba | GB, VC36 Herefordshire, Skenfrith | Augustin Ley | Augustin Ley | 10/5/1880 | BIRM |
| Populus alba | GB, VC36 Herefordshire, Wormbridge | Augustin Ley | Augustin Ley | 11/10/1883 | BIRM |
| Populus alba | GB, VC37 Worcestershire, Newland | Augustin Ley | Augustin Ley | 30/9/1879 | BIRM |
| Populus alba | GB, VC38 Warwickshire, Avon Dassett | | Robert Large Baker | | BIRM |
| Populus alba | GB, VC57 Derbyshire, Shirley Cultivated | William Richardson Linton | Augustin Ley | 20/4/1907 | BIRM |
| Populus alba | GB, VC57 Derbyshire, Shirley Cultivated | William Richardson Linton | | 5/8/1907 | BIRM |
| Populus alba | GB, VC64 Mid-west Yorkshire, Adel | William West | George Stephen West William West | 6/1906 | BIRM |
| Populus alba x tremula = P. x canescens | FR, Lannion, Brittany | Augustin Ley | Augustin Ley | 18/6/1909 | BIRM |
| Populus alba x tremula = P. x canescens | GB, Wiltshire, Chippenham | Augustin Ley | Augustin Ley | 10/10/1910 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC11 South Hampshire, Lyndhurst | Augustin Ley | Augustin Ley | 12/8/1882 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC18 South Essex, Wanstead | John Thomas Irvine Boswell-Syme | Donor Unknown John Thomas Irvine Boswell-Syme | 1853 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC28 West Norfolk, East Walton GB, VC28 West Norfolk, Narborough | Douglas Montague Heath | Douglas Montague Heath | 3/1915 to 15/5/1915 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC31 Huntingdonshire, Sawtry | William Richardson Linton | Botanical Exchange Club of The British Isles Augustin Ley William Richardson Linton | 20/4/1885 3/9/1885 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC34 West Gloucestershire, Clifton | James Walter White | Watson Botanical Exchange Club Harold Stuart Thompson | 20/3/1912 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC34 West Gloucestershire, Mangotsfield | James Walter White | Watson Botanical Exchange Club Harold Stuart Thompson | 26/3/1913 7/1915 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC34 West Gloucestershire, Olveston | Augustin Ley | Augustin Ley | 18/8/1909 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC35 Monmouthshire, Piercefield | Augustin Ley | Augustin Ley | 20/6/1872 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC36 Herefordshire, Eardisley | | Augustin Ley | 18/10/1887 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC36 Herefordshire, Netherton | Augustin Ley | Augustin Ley | 4/8/1881 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC36 Herefordshire, Weobley | Augustin Ley | Augustin Ley | 30/8/1882 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Donor Unknown | 5/1855 to 10/1855 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC38 Warwickshire, Offchurch | | Robert Large Baker | 6/1874 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC49 Caernarvonshire, Aber | Augustin Ley | Augustin Ley | 18/8/1886 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC55 Leicestershire, Ashby Parva | Augustin Ley | Augustin Ley | 6/1892 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC55 Leicestershire, Charnack Hill | William Bell | Botanical Exchange Club of The British Isles Augustin Ley | 7/1908 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC57 Derbyshire, Wyaston | William Richardson Linton | Augustin Ley | 19/4/1907 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC57 Derbyshire, Wyaston | William Richardson Linton | Augustin Ley | 30/7/1907 | BIRM |
| Populus balsamifera x deltoides = P. x jackii | GB, VC26 West Suffolk, Brent Eleigh | George Charles Brown | Douglas Montague Heath Frederick Robinson | 19/8/1915 | BIRM |