| Sparganium erectum subsp. neglectum | GB, VC6 North Somerset, Shapwick Heath | Harold Stuart Thompson | Harold Stuart Thompson | 18/9/1931 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC10 Isle of Wight, Freshwater,Golden Hill Fort | Charles Bailey | Botanical Exchange Club of The British Isles Augustin Ley | 11/10/1888 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey | William Hadden Beeby | | 1884 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Brookwood | William Hadden Beeby | Harold Stuart Thompson | 15/9/1889 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Cobham | William Hadden Beeby | Botanical Exchange Club of The British Isles Augustin Ley | 19/7/1885 | BIRM |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Woking | William Hadden Beeby | Augustin Ley | 15/9/1889 | BIRM |
| 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, 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, 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 | Botanical Exchange Club of The British Isles Charles Bailey | 5/10/1887 | BIRM |
| 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, VC17 Surrey, North Camp | William Hadden Beeby | | 28/9/1894 | BON |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, North Camp | William Hadden Beeby | | 28/9/1884 | BON |
| Sparganium erectum subsp. neglectum | GB, VC45 Pembrokeshire, Gumfreston | Charles Bailey | | 3/10/1887 5/10/1887 | BSBI |
| Sparganium erectum subsp. neglectum | GB, VC14 East Sussex, Catsfield | Ernest Stanley Salmon | William Hunt Painter | 23/9/1895 | SHYB |
| Sparganium erectum subsp. neglectum | GB, VC14 East Sussex, Catsfield | Ernest Stanley Salmon | Ernest Stanley Salmon | 3/10/1895 | SHYB |
| Sparganium erectum subsp. neglectum | GB, VC3 South Devon, Aveton Gifford | Edward Shearburn Marshall | | 17/7/1894 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC4 North Devon, Braunton | | William Hadden Beeby | 14/9/1889 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC4 North Devon, Braunton | William Hadden Beeby | William Hadden Beeby | 27/8/1889 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC14 East Sussex, Lewes | Joseph Woods | Allan Octavian Hume Frederick Townsend | 9/9/1853 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC14 East Sussex, Plumpton | Thomas Hilton | Allan Octavian Hume | 1/8/1907 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC14 East Sussex, Plumpton | Thomas Hilton | Allan Octavian Hume | 1/8/1907 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC15 East Kent, Westenhanger | Edward Shearburn Marshall | William Hadden Beeby | 15/7/1893 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Albury | William Hadden Beeby | William Hadden Beeby | 28/10/1883 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Aldershot | William Hadden Beeby | William Hadden Beeby | 28/9/1884 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Blackwater | William Hadden Beeby | William Hadden Beeby | 30/8/1884 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Camberley GB, VC17 Surrey, Reigate Cultivated | William Hadden Beeby | William Hadden Beeby | 25/6/1885 22/5/1886 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Cobham | William Hadden Beeby | William Hadden Beeby | 19/7/1885 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Godstone | William Hadden Beeby | William Hadden Beeby | 16/8/1885 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Lower Morden | Charles Edward Britton | Charles Edward Britton | 18/8/1906 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Lower Morden | Charles Edward Britton | Charles Edward Britton | 31/8/1909 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Merstham | William Hadden Beeby | William Hadden Beeby | 4/6/1870 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Merstham | William Hadden Beeby | William Hadden Beeby | 20/7/1870 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, Milford | Robert Hugh Bunting | William Robert Sherrin | 8/1906 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, North Camp | William Hadden Beeby | William Hadden Beeby | 29/9/1884 | SLBI |
| Sparganium erectum subsp. neglectum | GB, VC17 Surrey, North Camp | William Hadden Beeby | William Hadden Beeby | 23/5/1886 | SLBI |