Callitriche stagnalis
pond water-starwort

Distribution: Introduced in the Pacific Coast states, Montana, and some Eastern states

Habitat: Uncommon in streams, ponds and ditches

Flowers: May - August

Origin: Introduced from Europe

Growth Duration: Perennial

Conservation Status: Not of concern


Small aquatic herbs, the stems 3-15 cm. long, aquatic to terrestrial; leaf bases joined by small, winged ridges.


Leaves from linear and 1-nerved to broadly obovate-spatulate and 3- to 5-nerved, and nearly 1 cm. broad.


Flowers imperfect, sessile in the leaf axils, each consisting of a single pistil or 1 stamen or both; styles 2, distinct, 1-3 mm. long, reflexed to erect, deciduous; floral bracts conspicuous, white.


Carpels 2, round to oblong-oval, 1-1.5 mm. long, conspicuously wing-margined all around.

Accepted Name:
Callitriche stagnalis Scop.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Callitriche stagnalis checklist entry.

OregonFlora: Callitriche stagnalis information.

E-Flora BC: Callitriche stagnalis atlas page.

CalPhotos: Callitriche stagnalis photos.

USDA Plants: Callitriche stagnalis information.

29 photographs:
Group by