- Callitriche L.
- Callitriche fassettii Schotsman
- Callitriche hermaphroditica L.
- Callitriche autumnalis L.
- Callitriche heterophylla Pursh
- Callitriche heterophylla Pursh var. heterophylla Pursh [superfluous autonym]
- Callitriche heterophylla Pursh ssp. bolanderi (Hegelm.) Calder & Taylor
- Callitriche bolanderi Hegelm.
- Callitriche heterophylla Pursh var. bolanderi (Hegelm.) Fassett
- Callitriche heterophylla Pursh ssp. heterophylla
- Callitriche anceps Fern.
- Callitriche intermedia Hoffmann [excluded]
- Callitriche intermedia Hoffmann ssp. intermedia Hoffmann [excluded]
- Callitriche longipedunculata Morong
- Callitriche marginata Torr.
- Callitriche sepulta S. Wats.
- Callitriche palustris L.
- Callitriche palustris L. var. verna (L.) Fenley ex Jepson
- Callitriche verna L.
- Callitriche pedunculosa Nutt.
- Callitriche nuttallii Torr.
- Callitriche peploides Nutt.
- Callitriche peploides Nutt. var. semialata Fassett
- Callitriche stagnalis Scop.
- Callitriche terrestris Raf.
- Callitriche austinii Engelm.
- Callitriche deflexa A. Braun
- Callitriche deflexa A. Braun var. austinii (Engelm.) Hegelm.
- Callitriche deflexa A. Braun var. subsessilis Fassett
- Callitriche trochlearis Fassett
- water-starwort
- Fassett's water-starwort
- northern water-starwort
- Callitriche hermaphroditica
- twoheaded water-starwort
- Callitriche heterophylla
- Bolander's water-starwort
- Callitriche heterophylla ssp. bolanderi
- Callitriche heterophylla ssp. heterophylla
-
- longstock water-starwort
- winged water-starwort
- Callitriche marginata
- vernal water-starwort
- Callitriche palustris
- Nuttall's water-starwort
- Callitriche pedunculosa
- matted water-starwort
- Callitriche peploides
- pond water-starwort
- terrestrial water-starwort
- Callitriche terrestris
- effluent water-starwort
- 