| Carduus tenuiflorus | IE, VCH21 Co. Dublin, Sutton | Robert Lloyd Praeger | Robert Lloyd Praeger | 20/7/1902 | DBC |
| Carduus pycnocephalus subsp. tenuifolius | GB, VC113 Channel Islands, L'Eree Bay, Guernsey | T C Royle | | 11/6/1895 | SHYB |
| Carduus pycnocephalus | GB, VC113 Channel Islands, Jersey,Rozel GB, VC15 East Kent, Dover GB, VC15 East Kent, Sheppey | | | | SHYB |
| Carduus crispus | GB, Ambiguous locality (GB), Whitchurch | | William Hunt Painter | 9/1882 | ABS |
| Carduus crispus | GB, VC83 Midlothian, Edinburgh, Slateford | Isaac A Helsby | Isaac A Helsby | 26/7/1905 | SLBI |
| Carduus crispus | GB, VC83 Midlothian, Cramond | Janet Hunt | | 5/8/1959 | ABS |
| Carduus crispus | GB, VC70 Cumberland, Gilsland | | Allan Octavian Hume Frederick Townsend | 8/9/1899 | SLBI |
| Carduus crispus x nutans = C. x stangii | GB, VC66 County Durham, Hartlepool | Edward Francis Linton | Botanical Exchange Club of The British Isles | 8/1885 | MANCH |
| Carduus acanthoides | GB, VC62,VC64, Nun Monkton | Harold Stuart Thompson | Harold Stuart Thompson | 8/1885 | BIRM |
| Carduus crispus | GB, VC64 Mid-west Yorkshire, Airton | William West | George Stephen West | 7/1878 | BIRM |
| Carduus nutans | GB, VC63 South-west Yorkshire, Conisborough | | | 7/1875 | ABS |
| Carduus acanthoides | GB, VC63 South-west Yorkshire, Bolton Woods | William West | George Stephen West | 10/1879 | BIRM |
| Carduus crispus | GB, VC60 West Lancashire, Morecambe | | William Hunt Painter | 8/1864 | ABS |
| Carduus tenuiflorus | GB, VC58 Cheshire, Hoylake | John Harbord Lewis | George Stephen West John Harbord Lewis | 1/7/1876 | BIRM |
| Carduus nutans | GB, VC57 Derbyshire, Wormhill | William West | George Stephen West William West | 7/1877 | BIRM |
| Carduus nutans | GB, VC57 Derbyshire, Deep Dale | Augustin Ley | Augustin Ley | 11/8/1869 | BIRM |
| Carduus crispus | GB, VC55 Leicestershire, Twycross | Frederick Townsend | Allan Octavian Hume Frederick Townsend | 8/1843 | SLBI |
| Carduus crispus x nutans = C. x stangii | GB, VC55 Leicestershire, Lowesby | Arthur Reginald Horwood | Watson Botanical Exchange Club Charles Bailey | 8/7/1905 | MANCH |
| Carduus crispus x nutans = C. x stangii | GB, VC55 Leicestershire, Lowesby | Arthur Reginald Horwood | Botanical Exchange Club of The British Isles Charles Bailey | 8/7/1905 | MANCH |
| Carduus crispus x nutans = C. x stangii | GB, VC55 Leicestershire, Lowesby | Arthur Reginald Horwood | Botanical Exchange Club of The British Isles Augustin Ley | 8/7/1895 | BIRM |
| Carduus acanthoides | GB, VC55 Leicestershire, Ashby Parva | Augustin Ley | Augustin Ley | 12/10/1887 | BIRM |
| Carduus nutans | GB, VC50 Denbighshire, Pen y Bryn | Angela J Davies | | 28/9/1966 | ABS |
| Carduus tenuiflorus | GB, VC49 Caernarvonshire, Llandudno | Augustin Ley | Augustin Ley | 17/6/1901 | BIRM |
| Carduus tenuiflorus | GB, VC49 Caernarvonshire, Great Ormes Head | Augustin Ley | Augustin Ley | 18/6/1901 | BIRM |
| Carduus tenuiflorus | GB, VC49 Caernarvonshire, Great Ormes Head | | William Hunt Painter | 7/1879 | ABS |
| Carduus tenuiflorus | GB, VC49 Caernarvonshire, Great Ormes Head | William West | George Stephen West William West | 7/8/1888 | BIRM |
| Carduus tenuiflorus | GB, VC49 Caernarvonshire, Conway | | William Hunt Painter | 7/1865 | ABS |
| Carduus tenuiflorus | GB, VC45 Pembrokeshire, Tenby | Robert Large Baker | Robert Large Baker | 6/1873 | BIRM |
| Carduus nutans | GB, VC45 Pembrokeshire, Saint David's Head | Andrew David Quentin Agnew | | 2/6/1975 | ABS |
| Carduus nutans | GB, VC44 Carmarthenshire, Burry Port | Barbara A G Williams | | 4/9/1959 | ABS |
| Carduus nutans | GB, VC42 Breconshire, Clydach GB, VC42 Breconshire, Craig y Cilau | Augustin Ley | Augustin Ley | 22/8/1909 | BIRM |
| Carduus crispus | GB, VC41 Glamorganshire, Weobley Castle | Philip Frank Wareing | Philip Frank Wareing | 7/1949 | ABS |
| Carduus pycnocephalus | GB, VC41 Glamorganshire, Sully Island | Arthur Edward Wade | Botanical Exchange Club of The British Isles National Museum of Wales | 6/1938 | SLBI |
| Carduus tenuiflorus | GB, VC41 Glamorganshire, Penmaen | Augustin Ley | Augustin Ley | 2/6/1903 | BIRM |
| Carduus nutans | GB, VC41 Glamorganshire, Merthyr-mawr Warren | Roger Parsons | | 18/7/1965 | ABS |
| Carduus crispus | GB, VC40 Shropshire, Stapleton | | | 8/1900 | SHYB |
| Carduus crispus | GB, VC40 Shropshire, Shrewsbury | William Allport Leighton | Frederick Townsend | 7/1838 | SLBI |
| Carduus nutans | GB, VC40 Shropshire, Pulverbatch | Richard de Gylpyn Benson | | 7/1891 | SHYB |
| Carduus nutans | GB, VC40 Shropshire, Presthope | George Sidney Streatfeild M P | Dulwich College | 8/1898 | SLBI |
| Carduus nutans | GB, VC40 Shropshire, Laundry Rough | Richard de Gylpyn Benson | | 14/6/1888 | SHYB |