| Helleborus viridis subsp. occidentalis | GB, VC3 South Devon, Plymouth | William Booth Waterfall | Charles Bailey | 2/1877 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Abbots Leigh | James Walter White | James Walter White | 18/2/1892 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Abbots Leigh | James Walter White | | 3/1884 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Bristol | George Henry Kendrick Thwaites | George Henry Kendrick Thwaites | 4/1842 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Leigh Woods | William E Green | Charles Bailey | 2/1877 4/1877 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Leigh Woods | Leopold Hartley Grindon | Charles Bailey William Lowndes Notcutt | 4/1842 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Leigh Woods | George Henry Kendrick Thwaites | John Bland Wood William Wilson | 4/1842 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC6 North Somerset, Roman Camp, Leigh Woods | William E Green | Charles Bailey John Harbord Lewis | 2/1876 3/1876 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC7 North Wiltshire, Monkton Farleigh | Frederick Thompson Mott | Charles Bailey Frederick Thompson Mott Thomas Thorp | 3/1893 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC7 North Wiltshire, Monkton Farleigh | Spencer Henry Bickham | John Wilson Rimington Spencer Henry Bickham | 30/3/1859 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC7 North Wiltshire, Ogbourne | | Botanical Society & Exchange Club of The British Isles Joseph Donald Grose | 22/4/1934 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC17 Surrey, Mickleham | James Alexander Brewer | John Harbord Lewis | 5/1857 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC20 Hertfordshire, Watford | Irvine | Charles Bailey | 4/1869 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC22 Berkshire, Basildon | George Claridge Druce | Botanical Exchange Club Charles Bailey | 5/1877 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC22 Berkshire, Basildon | George Claridge Druce | Botanical Exchange Club Charles Bailey | 5/1877 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC22 Berkshire, Basildon | George Claridge Druce | Charles Bailey George Claridge Druce | 5/1887 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC22 Berkshire, Harwell | Robert Southey Hill | Robert Southey Hill William Wilson | | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC29 Cambridgeshire, Cambridge | Marmaduke Alexander Lawson | Charles Bailey John Harbord Lewis | 1862 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC29 Cambridgeshire, Caxton Gibbet,Swanley Wood | Reginald Henry Goode | Watson Botanical Exchange Club George Goode | 3/4/1914 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC29 Cambridgeshire, Coton | John Stevens Henslow | William Wilson | 13/3/1826 to 31/3/1826 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC33 East Gloucestershire, Painswick | | | 1894 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC33 East Gloucestershire, Painswick | | | 1894 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC34 West Gloucestershire, Kilcott | Charles L Walton | | 3/1905 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC34 West Gloucestershire, Kilcott | Charles L Walton | Manchester Museum (Owens College) | 4/1905 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC36 Herefordshire, Great Doward | Charles Bailey | | 21/5/1875 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC36 Herefordshire, River Wye | Charles Bailey | | 21/5/1875 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC38 Warwickshire, Allesley | | John Wilson Rimington | 1843 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC39 Staffordshire, Ilam | John Edward Sunderland | William Hunt Painter | 5/1877 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, Lincolnshire, Lincoln | | Fletcher | 5/1847 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Buxton | Spencer Henry Bickham | Charles Bailey | 1/5/1868 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Buxton | Spencer Henry Bickham | Charles Bailey John Barrow | 6/1868 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Lathkill | | | | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Mapleton | Charles Bailey | | 31/5/1863 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Mapleton | Charles Bailey | Charles Bailey | 31/5/1863 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Miller's Dale | Charles Bailey | Charles Bailey | 5/8/1876 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Miller's Dale | Charles Bailey | Charles Bailey | 5/4/1876 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Wormhill | William Isaac Hannan | William Hunt Painter | 7/1879 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC57 Derbyshire, Youlgreave | William Wilson | | 4/1831 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC62 North-east Yorkshire, Brompton | James Ward | William Wilson | 22/3/1836 | MANCH |
| Helleborus viridis subsp. occidentalis | GB, VC62 North-east Yorkshire, Castle Howard | Henry Ibbotson | Charles Bailey John Ray Hardy | 1842 | MANCH |