| Callitriche obtusangula | GB, VC29 Cambridgeshire, Lingey Fen | Edgar John Allard | John Innes Horticultural Institute | 19/5/1904 | K |
| Callitriche obtusangula | GB, VC34 West Gloucestershire, Lydney | Joan Allen | | | K |
| Callitriche obtusangula | GB, VC34 West Gloucestershire, Lydney | Joan Allen | | 11/7/1977 | K |
| Callitriche obtusangula | GB, VC34 West Gloucestershire, Lydney | Joan Allen | | 11/7/1977 | K |
| Callitriche obtusangula | GB, VC34 West Gloucestershire, Lydney | Joan Allen | | 11/2/1923 | K |
| Callitriche heterophylla | US, FL, Clay County, Bayard State Conservation Area | Loran C Anderson | Florida State University, Robert K. Godfrey Herbarium | 24/7/1999 | FSU |
| Callitriche heterophylla | US, FL | Loran C Anderson | Florida State University, Robert K. Godfrey Herbarium | 22/4/1985 | FSU |
| Callitriche heterophylla | US, FL, Franklin County, Saint Vincent Island | Loran C Anderson | Apalachicola National Estuarine Sanctuary | 2/4/1987 | FSU |
| Callitriche heterophylla | US, FL, Franklin County, Ochlockonee River | Loran C Anderson | | 22/4/1985 | FSU |
| Callitriche heterophylla | US, FL, Franklin County, Saint Vincent Island | Loran C Anderson | | 18/4/1984 | FSU |
| Callitriche heterophylla | US, FL, Franklin County, Cow Creek | Loran C Anderson | | 4/4/1998 | FSU |
| Callitriche heterophylla | US, FL, Franklin County, Cow Creek | Loran C Anderson | | 27/4/1991 | FSU |
| Callitriche heterophylla | US, FL, Putnam County, Crystal Cove | Loran C Anderson | | 4/5/2010 | FSU |
| Callitriche brutia | GB, VC38 Warwickshire, Alvecote Pools | George Albert Arnold Maurice Arthur Arnold | Flora of Warwickshire Voucher Specimen | 27/2/1974 | BIRM |
| Callitriche brutia | GB, VC38 Warwickshire, Fazeley | George Albert Arnold Maurice Arthur Arnold | Flora of Warwickshire Voucher Specimen | 20/6/1971 | BIRM |
| Callitriche brutia | GB, VC39 Staffordshire, Fazeley | George Albert Arnold Maurice Arthur Arnold | Flora of Warwickshire Voucher Specimen | 20/6/1971 | BIRM |
| Callitriche palustris | GB, VC34 West Gloucestershire, Bristol, Cooks Folly | Martha Maria Atwood | Donor Unknown Martha Maria Atwood | 5/1853 | BIRM |
| Callitriche brutia | IE, VCH27 West Mayo, Mullet | Charles Cardale Babington | | | K |
| Callitriche intermedia | GB, VC29 Cambridgeshire, Witchford | Charles Cardale Babington | George Stephen West William West | 6/7/1855 | BIRM |
| Callitriche intermedia | GB, VC29 Cambridgeshire, Aldreth | Charles Cardale Babington | George Stephen West William West | 6/7/1855 | BIRM |
| Callitriche intermedia | GB, VC49 Caernarvonshire, Cwm Glas Bach | Charles Cardale Babington John Roberts | Jacques Étienne Gay William Jackson Hooker | 19/8/1862 | K |
| Callitriche hamulata | GB, VC38 Warwickshire, Coventry | James Eustace Bagnall | | 8/1883 | SLBI |
| Callitriche hamulata | GB, VC38 Warwickshire, Bradnock's Marsh | James Eustace Bagnall | | 30/6/1883 | SLBI |
| Callitriche stagnalis | GB, VC38 Warwickshire, Kingsbury | James Eustace Bagnall | James Eustace Bagnall | 18/8/1883 | SLBI |
| Callitriche stagnalis | GB, VC38 Warwickshire, Birdingbury | James Eustace Bagnall | | 8/1883 | SLBI |
| Callitriche autumnalis | GB, VC106 East Ross & Cromarty, Loch Kinellan | Charles Bailey | George Stephen West | 28/7/1890 | BIRM |
| Callitriche autumnalis | IE, VCH16,VCH26, Cong | Charles Bailey | Charles Bailey George Stephen West | 2/10/1885 | BIRM |
| Callitriche autumnalis | GB, VC74 Wigtownshire, Stranraer | Charles Bailey | George Stephen West | 27/9/1883 | BIRM |
| Callitriche brutia | GB, VC59 South Lancashire, Chorlton [Chorlton-cum-Hardy] | | Charles Bailey John Wilson Rimington Spencer Henry Bickham | 1843 | MANCH |
| Callitriche hamulata | GB, VC58 Cheshire, Hale Moss | Charles Bailey | Charles Bailey | 6/1875 | MANCH |
| Callitriche hamulata | GB, VC58 Cheshire, Hale Barnes | Charles Bailey | Charles Bailey | 4/1868 | MANCH |
| Callitriche hamulata | GB, VC58 Cheshire, Tattenhall | John Harbord Lewis | Charles Bailey John Harbord Lewis | 9/1874 | MANCH |
| Callitriche hamulata | GB, VC59 South Lancashire, Little Crosby | John Harbord Lewis | Charles Bailey | 8/5/1875 | MANCH |
| Callitriche hamulata | GB, VC11 South Hampshire, Brockenhurst | Charles Bailey | George Stephen West | 18/5/1883 | BIRM |
| Callitriche hermaphroditica | GB, VC58 Cheshire, Rostherne Mere | Charles Bailey | Charles Bailey | 13/8/1892 | MANCH |
| Callitriche hermaphroditica | GB, VC58 Cheshire, Rostherne Mere | Henry (Harry) Searle | Charles Bailey | 11/8/1885 | MANCH |
| Callitriche hermaphroditica | GB, VC58 Cheshire, Rostherne Mere | Henry (Harry) Searle | Manchester Museum Charles Bailey | 8/1885 | MANCH |
| Callitriche hermaphroditica | GB, VC58 Cheshire, Rostherne Mere | Charles Bailey | Charles Bailey | 13/8/1892 | MANCH |
| Callitriche hermaphroditica | GB, VC58 Cheshire, Rostherne Mere | Charles Bailey | Charles Bailey | 13/8/1892 | MANCH |
| Callitriche hermaphroditica | GB, VC60 West Lancashire, Preston | F C King | Charles Bailey | 8/1883 | MANCH |