| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Reigate Heath | William Hadden Beeby | William Hadden Beeby | 5/10/1884 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Reigate Heath | William Hadden Beeby | William Hadden Beeby | 7/7/1886 6/8/1886 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Woking | William Hadden Beeby | William Hadden Beeby | 15/9/1889 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Woking | William Hadden Beeby | Augustin Ley | 15/9/1889 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC19 North Essex, Broxbourne | J H Albrecht | J H Albrecht | 5/7/1930 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Joseph Edward Little | 17/9/1922 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC20 Hertfordshire, Ippollyts Brook | Joseph Edward Little | Watson Botanical Exchange Club | 3/10/1929 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC26 West Suffolk, Kersey | Edward Francis Linton | Botanical Exchange Club of The British Isles Edward Francis Linton Augustin Ley | 18/8/1886 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC28 West Norfolk, Fordham | Joseph Edward Little | Joseph Edward Little | 9/10/1924 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC30 Bedfordshire, Flitwick | Richard Morse | William Robert Sherrin | 9/1926 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC33 East Gloucestershire, Tewkesbury | | C E Robinson | 29/9/1888 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC36 Herefordshire, Harewood | Augustin Ley | Botanical Exchange Club of The British Isles William Robert Sherrin | 9/1866 11/1886 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC36 Herefordshire, Harewood | Augustin Ley | Augustin Ley | 20/11/1886 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC36 Herefordshire, King's Caple | Augustin Ley | Augustin Ley | 8/1885 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC36 Herefordshire, King's Caple | William Hadden Beeby | Augustin Ley | 20/10/1885 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC36 Herefordshire, Leominster | Augustin Ley | Augustin Ley | 28/8/1885 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC36 Herefordshire, Moccas Park | Augustin Ley | Augustin Ley | 25/8/1891 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC37 Worcestershire, Malvern Link | Richard Francis Towndrow | Botanical Exchange Club of The British Isles Augustin Ley | 5/10/1886 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC45 Pembrokeshire, Gumfreston | Charles Bailey | | 3/10/1887 5/10/1887 | BSBI |
| Sparganium erectum subsp. neglectum | GB, VC45 Pembrokeshire, Penally Railway Station | Charles Bailey | Botanical Exchange Club of The British Isles Augustin Ley | 5/10/1887 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC45 Pembrokeshire, Tenby | Charles Bailey | William Hadden Beeby Charles Bailey | 3/10/1887 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC45 Pembrokeshire, Tenby | Charles Bailey | Botanical Exchange Club of The British Isles Charles Bailey | 5/10/1887 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC47 Montgomeryshire, Dovey Junction | William Charles Barton | William Charles Barton | 30/8/1923 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC62 North-east Yorkshire, Scalby | | William Hadden Beeby | 9/1896 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC62 North-east Yorkshire, Scalby Beck | Isaac Henry Burkill | William Hadden Beeby Arthur Bennett | 9/1895 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC62 North-east Yorkshire, Scarborough | Isaac Henry Burkill | George Stephen West Isaac Henry Burkill | 9/1895 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC62 North-east Yorkshire, Stain Dale | Isaac Henry Burkill | Isaac Henry Burkill William Hadden Beeby | 9/1896 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC98 Argyllshire, Lismore Island | Symers MacDonald Macvicar | William Hadden Beeby | 3/8/1898 to 4/8/1898 | SLBI |