Autumnal Water-starwort, Northern Water-starwort: Callitriche fassettii (Synonyms: Callitriche autumnalis, Callitriche hermaphroditica, Callitriche hermaphroditica ssp. hermaphroditica) -
Bolander's Water Starwort, Different-leaved Water Starwort, Two-headed Water-starwort: Callitriche heterophylla var. bolanderi (Synonyms: Callitriche bolanderi, Callitriche heterophylla ssp. bolanderi) -
Different-leaved Water-starwort: Callitriche heterophylla var. heterophylla (Synonym: Callitriche anceps) -
Spring Water-starwort, Spring Water Starwort, Vernal Water-starwort, Vernal Water Starwort: Callitriche palustris (Synonyms: Callitriche anceps, Callitriche palustris var. verna, Callitriche verna) -
Pond Water-starwort: Callitriche stagnalis -
Narrow-wing Water-starwort: Callitriche stenoptera -
Wheel-fruited Water-starwort: Callitriche trochlearis -