Callitriche heterophylla, commonly called twoheaded water-starwort, is a species of flowering plant in the family Plantaginaceae. It is native to North America, where it found in the north from Greenland to Alaska, south to Mexico. It is widespread in the United States. Its natural habitat is in a wide variety of wetlands, including ponds, streams, and mudflats. It is typically found in areas of still or slow moving water.
Callitriche heterophylla is an aquatic plant, growing almost entirely submerged except for its floating stem tips. It produces minutely small flowers throughout the growing season.
Taxonomy Callitriche heterophylla was scientifically described and named in 1813 by Frederick Traugott Pursh. It is part of the genus Callitriche which is classified in the family Plantaginaceae. According to Plants of the World Online it has eleven heterotypic synonyms.
Table of Synonyms Name Year Rank Notes Callitriche anceps 1908 species Callitriche asagraei 1864 species Callitriche bolanderi 1868 species Callitriche brevifolia 1813 species Callitriche cruciata 1811 species nom. utique rej. Callitriche heterophylla subsp. bolanderi 1963 subspecies Callitriche heterophylla var. bolanderi 1951 variety Callitriche ovata 1811 species nom. utique rej. Callitriche palustris var. bolanderi 1936 variety Callitriche spuria 1808 species nom. utique rej. Callitriche tuerckheimii 1912 species
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