Vascular Plants - Plantaginaceae - Callitriche:
Callitriche palustris
vernal water-starwort, spring water-starwort 
Blooms: June - August
Habit: herb
Duration: perennial
Origin: Native
Distribution: General in North America except Mexico and south and southeast United States.
Habitat: Sloughs and slow-moving fresh water.
Species Description:

General: Small aquatic herbs, the stems 5-20 cm. long, submerged or partially floating; leaf bases joined by small, winged ridges.
Leaves: Submerged leaves linear, 5-20 mm. long, thin, 1-nerved, with a slight notch at the tip; floating and emergent leaves broadly spatulate, up to 4 mm. broad, 3-nerved.
Flowers: Flowers imperfect, sessile in the leaf axils, each consisting of a single pistil or 1 stamen or both; styles 2, distinct, 1-2.5 mm. long, deciduous; floral bracts present.
Fruits: Carpels 2, oblong-obovate, about 1 mm. long and 0.7 mm. broad, with pit-like markings in vertical lines.
Accepted Name:
Callitriche palustris L.
Synonyms:
Callitriche anceps Fernald
Callitriche verna L.

Treated in Flora of the PNW as:
Callitriche verna
Additional Resources:

PNW Herbaria Specimens: View list of all Callitriche palustris specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Callitriche palustris specimens in the WTU Herbarium database.

Washington Flora Checklist: Callitriche palustris treatment.

E-Flora BC: Callitriche palustris atlas page.

CalPhotos: Callitriche palustris images.

USDA Plants Database: Callitriche palustris.
Additional photographs of Callitriche palustris:
(click on a thumbnail to view larger photo)

Don Knoke, 2005

Don Knoke, 2005

R. V. Lansdown, 2006

R. V. Lansdown, 2006

R. V. Lansdown, 2006

Susan McDougall, 2004

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Robert L. Carr, 2016

Craig Althen, 2013
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Washington Native Plant Society
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