Vascular Plants - Caryophyllaceae - Cerastium:
Cerastium fontanum
Page Author: David Giblin
common mouse-ear chickweed 
Blooms: March - September
Habit: herb
Duration: biennial,perennial
Origin: Introduced from Europe
Distribution: Introduced and common in most of Canada and the United States; more common east of the Cascades
Habitat: Disturbed ground, lawns and gardens
Species Description:

General: Stiff-hairy, glandular biennial or perennial, the stems sprawling but the flowering stems erect, 2-4 dm. tall.
Leaves: Leaves of the prostrate stems opposite, crowded, oblanceolate, 10-25 mm. long and 2-5 mm. broad; leaves of the flowering stems opposite, widely spaced, up to 4 cm. long and 15 mm. broad.
Flowers: Flowers several in an open, dichotomously branched inflorescence; sepals 5, 4-7 mm. long, stiff-hairy; petals 5, white, bi-lobed, equaling the sepals; stamens 10; styles 5.
Fruits: Capsule membranous, cylindric, slightly curved, twice as long as the sepals, opening by 10 teeth.
Subspecies & Varieties:
Accepted Name:
Cerastium fontanum Baumg.
Synonyms:
(none)

Treated in Flora of the PNW as:
Cerastium vulgatum
Additional Resources:

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

WTU Herbarium Specimens: View list of Cerastium fontanum specimens in the WTU Herbarium database.

Washington Flora Checklist: Cerastium fontanum treatment.

E-Flora BC: Cerastium fontanum atlas page.

CalPhotos: Cerastium fontanum images.

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

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Richard Old

Richard Old

Richard Old

Bud Kovalchik

Bud Kovalchik

Ron Bockelman, 2010

Ron Bockelman, 2010

Ron Bockelman, 2010

G. D. Carr, 2012

G. D. Carr, 2012

G. D. Carr, 2012

G. D. Carr, 2012

G. D. Carr, 2012

Ron Bockelman, 2014

Ron Bockelman, 2014

Ron Bockelman, 2014

Ron Bockelman, 2014

Craig Althen, 2017

Craig Althen, 2017

Craig Althen, 2017
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Washington Native Plant Society
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