| Callitriche heterophylla | US, FL, Putnam County, Crystal Cove | Loran C Anderson | | 4/5/2010 | FSU |
| 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, 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 | GB, VC24 Buckinghamshire, Colnbrook | Bernard Verdcourt | | 17/6/1989 | K |
| Callitriche | GB, VC21,VC24, Colnbrook | Bernard Verdcourt | | 17/6/1989 | K |
| 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 | 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 | | 18/4/1984 | FSU |
| Callitriche heterophylla | US, FL, Escambia County, Century | James R Burkhalter | | 24/3/1984 | FSU |
| Callitriche intermedia | GB, VC88 Mid Perthshire, Kenmore | Bernard Verdcourt | | 30/6/1983 | K |
| Callitriche heterophylla | US, FL, Jefferson County, Wacissa | S.W. Leonard | | 20/3/1983 | FSU |
| Callitriche truncata | GB, VC55 Leicestershire, Groby Pool | Edith Hesselgreaves | | 23/12/1982 | K |
| Callitriche stagnalis | IE, VCH19 Co. Kildare, Tankardstown | Micheline Joan Sheehy Skeffington | | 20/6/1982 | GALW |
| Callitriche obtusangula | IE, VCH17 North-east Galway, East Corrib | Micheline Joan Sheehy Skeffington | | 18/5/1982 | GALW |
| Callitriche stagnalis | IE, VCH16 West Galway, Rossaveel | Micheline Joan Sheehy Skeffington | | 17/5/1981 | GALW |
| Callitriche stagnalis | GB, VC57 Derbyshire, New Mills | Brian William Fox | | 6/10/1979 | MANCH |
| Callitriche truncata | GB, VC27 East Norfolk, River Bure | Nigel Trevor Henry Holmes | | 15/9/1978 | K |
| Callitriche | GB, VC27 East Norfolk, River Bure | Nigel Trevor Henry Holmes | | 9/1978 | K |
| Callitriche | GB, VC11 South Hampshire, River Itchen | Nigel Trevor Henry Holmes | | 8/1978 | 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 intermedia subsp. hamulata | GB, VC57 Derbyshire, Chesterfield | J G Hodgson S Bond | | 12/11/1976 | K |
| Callitriche platycarpa | GB, VC63 South-west Yorkshire, Hatchell Wood | J G Hodgson | | 29/9/1976 | K |
| Callitriche platycarpa | GB, VC63 South-west Yorkshire, Hatfield | J G Hodgson S Bond | | 6/9/1976 | K |
| Callitriche platycarpa | GB, VC63 South-west Yorkshire, Hatfield Moor | J G Hodgson S Bond | | 6/9/1976 | K |
| Callitriche stagnalis | GB, VC56 Nottinghamshire, Scrooby | J G Hodgson | | 30/8/1976 | K |
| Callitriche intermedia subsp. hamulata | GB, VC57 Derbyshire, Birleyhay | J G Hodgson | | 25/7/1976 | K |
| Callitriche intermedia subsp. hamulata | GB, VC57 Derbyshire, Bonsall | J G Hodgson | | 15/7/1976 | K |
| Callitriche platycarpa | GB, VC56 Nottinghamshire, Ranskill | J G Hodgson S Bond | | 30/8/1974 | K |
| Callitriche platycarpa | GB, VC56 Nottinghamshire, Ranskill | J G Hodgson S Bond | | 30/8/1974 | K |
| Callitriche platycarpa | GB, VC63 South-west Yorkshire, Torne Bridge | Carr J Band J G Hodgson | | 15/8/1974 | K |
| Callitriche stagnalis | GB, VC63 South-west Yorkshire, Rivelin Brook | J G Hodgson | | 12/8/1974 | K |
| Callitriche intermedia subsp. hamulata | GB, VC57 Derbyshire, Brampton | Charles B Waite J G Hodgson S Bond | | 9/8/1974 | K |
| Callitriche intermedia subsp. hamulata | GB, VC57 Derbyshire, Chatsworth | J G Hodgson S Bond | | 7/8/1974 | K |
| Callitriche obtusangula | GB, VC61 South-east Yorkshire, Styrrup Carr | J G Hodgson | | 29/7/1974 | K |
| Callitriche obtusangula | GB, VC5 South Somerset, Curry Moor | John Keyloch | | 15/7/1974 | K |
| Callitriche obtusangula | GB, VC60 West Lancashire, Carnforth | Eric Fairgrieve Greenwood | | 4/7/1974 | K |
| Callitriche brutia | GB, VC38 Warwickshire, Alvecote Pools | George Albert Arnold Maurice Arthur Arnold | Flora of Warwickshire Voucher Specimen | 27/2/1974 | BIRM |