Page author: Don Knoke
Callitriche hermaphroditica
autumn water-starwort, northern water-starwort

Distribution: Across northern North America, south to central California, northern New Mexico, the Great Lakes, and northeast United States.

Habitat: Sloughs and streams.

Flowers: July - September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Small aquatic plants, emersed, the stems slender, 5-15 cm. long, with widely-spaced internodes.


Leaves all linear, 5-20 mm. long, 1-nerved, delicate, bright lustrous-green, inconspicuously white-margined, the tips bifid, the bases broadened but not forming ridges or wings on the stem between the bases.


Flowers imperfect, sessile in the leaf axils, each consisting of a single pistil or 1 stamen or both; styles 1-2 mm. long, soon deciduous; floral bracts wanting.


Carpels 1-2 mm. long, oval in outline, the margins narrowly winged above, the faces shallowly pitted.

Accepted Name:
Callitriche hermaphroditica L.

Synonyms & Misapplications:
Callitriche autumnalis L., superfluous renaming (illegitimate) [Abrams]
Additional Resources:

PNW Herbaria: Specimen records of Callitriche hermaphroditica in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Callitriche hermaphroditica checklist entry.

OregonFlora: Callitriche hermaphroditica information.

E-Flora BC: Callitriche hermaphroditica atlas page.

CalPhotos: Callitriche hermaphroditica photos.

USDA Plants: Callitriche hermaphroditica information.

0 photographs:
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