| Juncus capitatus | GB, VC21 Middlesex, East Bedfont | Job Edward Lousley | Botanical Society & Exchange Club of The British Isles | 18/8/1945 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Jersey,La Moye | William Charles Barton | Watson Botanical Exchange Club William Charles Barton | 14/6/1923 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Chyenhal Moor | Eleonora Armitage | | 7/1904 | ABS |
| Juncus capitatus | GB, VC113 Channel Islands, Jersey, Saint Catherine's Bay | Louis Arsene | Isaac A Helsby | 10/5/1925 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Saint Brelade's Bay | Charles Bailey | Dulwich College | 29/7/1891 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Sennen | | Robert Large Baker | 14/7/1873 | BIRM |
| Juncus capitatus | GB, VC113 Channel Islands, Jersey | | Robert Large Baker | 1876 | BIRM |
| Juncus capitatus | GB, VC1 West Cornwall, Land's End | William Hadden Beeby | William Hadden Beeby | 10/6/1872 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Guernsey | Henry Elliott Fox | William Hadden Beeby | 7/1867 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Kynance Cove | William Hadden Beeby | William Hadden Beeby | 21/6/1872 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Penzance | Richard Charles L'Estrange Burges | | 7/8/1946 | BIRM |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | Richard Charles L'Estrange Burges | | 9/4/1950 | BIRM |
| Juncus capitatus | GB, VC1 West Cornwall, Chyenhal Moor | William Curnow | | 7/1879 | ABS |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | William Curnow | William Hillhouse | 6/1878 | BIRM |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | William Curnow | William Hadden Beeby | 5/1877 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Chyenhal Moor | William Curnow | William Hadden Beeby | 6/1877 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Loe Pool | Eric Frederic Drabble | Croydon Natural History and Scientific Society Stafford Edwin Chandler | 7/10/1911 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Jersey,Greve de Lecq | George Claridge Druce | George Stephen West William West | 6/1877 | BIRM |
| Juncus capitatus | GB, VC113 Channel Islands, Guernsey, L'Avenue bay | | Henry Elliott Fox | 7/1867 | ABS |
| Juncus capitatus | GB, VC113 Channel Islands, Saint Brelade's Bay | J Fraser | | 6/1883 | ABS |
| Juncus capitatus | GB, VC1 West Cornwall, Kynance Cove | Douglas Montague Heath | Douglas Montague Heath | 27/6/1927 | BIRM |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | | Isaac A Helsby Knox | 6/1930 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Kynance | Allan Octavian Hume | Allan Octavian Hume | 24/9/1899 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | Allan Octavian Hume | Allan Octavian Hume | 11/6/1903 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | Allan Octavian Hume | Allan Octavian Hume | 11/6/1902 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Kynance Downs | Allan Octavian Hume | Allan Octavian Hume | 2/6/1899 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | Allan Octavian Hume | Allan Octavian Hume | 11/6/1902 | SLBI |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | Francis José | Croydon Natural History and Scientific Society Henry Franklin Parsons | 1887 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Guernsey, Fort Doyle GB, VC113 Channel Islands, Guernsey,Fort le Marchant | Langley Kitching | Langley Kitching | 6/1898 | BIRM |
| Juncus capitatus | GB, VC113 Channel Islands, Jersey | | Augustin Ley | 23/4/1885 | BIRM |
| Juncus capitatus | GB, VC113 Channel Islands, Saint Aubin's | Augustin Ley | Augustin Ley | 17/4/1885 | BIRM |
| Juncus capitatus | GB, VC113 Channel Islands, Guernsey | Henry Elliott Fox | Augustin Ley | 7/1867 | BIRM |
| Juncus capitatus | GB, VC113 Channel Islands, Guernsey | Adcock | William Hunt Painter | 7/1867 | ABS |
| Juncus capitatus | GB, VC113 Channel Islands, Les Quennevais | Jean Piquet | Croydon Natural History and Scientific Society Henry Franklin Parsons | 6/1865 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Jersey | Leighton | John Ralfs | 1839 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Jersey | Jean Piquet | John Ralfs | 6/1877 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Jersey | William Stevens | George Stephen West John Gilbert Baker | 8/1851 | BIRM |
| Juncus capitatus | GB, VC1 West Cornwall, Kynance | William Nichols Tetley | William Nichols Tetley | 1904 | SLBI |
| Juncus capitatus | GB, VC113 Channel Islands, Vazon Common | Norman George Hadden | Harold Stuart Thompson | 2/6/1919 | BIRM |
| Juncus capitatus | GB, VC1 West Cornwall, Lizard | Harold Stuart Thompson | Harold Stuart Thompson | 7/1888 | BIRM |