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.
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
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Washington Native Plant Society
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