Callitriche heterophylla

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Callitriche heterophylla.jpg

|genus = Callitriche

|species = heterophylla

|authority = Pursh

}}

Callitriche heterophylla, commonly called twoheaded water-starwort,{{PLANTS|id=CAHE3|taxon=Callitriche heterophylla|access-date=14 August 2018}} 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.{{cite web |url=http://www.herbarium.unc.edu/flora.htm |title= Flora of the Southern and Mid-Atlantic States |author= Alan Weakley |date= 2015}} It is widespread in the United States.{{BONAP|ref|genus=Callitriche|species=heterophylla|accessdate=14 August 2018}} 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.{{cite book |last=Yatskievych |first=George |date=2013 |title=Flora of Missouri, Volume 3 |publisher=Missouri Botanical Garden Press |pages=623}}

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.