Page author: David Giblin
Holosteum umbellatum
jagged-chickweed
WTU specimens
Other herbaria

Distribution: Occurring chiefly east of the Cascades crestin Washington; British Columbia south to California, east to the Atlantic Coast.

Habitat: Disturbed areas, most common in the shrub-steppe.

Flowers: April-May

Origin: Introduced from Europe

Conservation Status: Not of concern

Description:
General:

Somewhat glandular-pubescent annual, the 1-several stems simple or basally branched, 5-20 cm. tall.

Leaves:

Leaves mainly in a basal rosette, lanceolate to oblong, 10-20 mm. long; cauline leaves 2-3 remote pairs, ovate-lanceolate, 10-35 mm. long, sessile.

Flowers:

Flowers 4-16 in a terminal umbel, the pedicels slender, 2-3 cm. long; sepals 5, distinct, about 3 mm. long; petals 5, white, equaling the calyx, the tips erose; stamens 5; styles 3.

Fruits:

Capsule ovoid-cylindric, twice as long as the calyx, opening by 6 valves.

Accepted Name:
Holosteum umbellatum L.
Publication: Sp. Pl. 1: 88. 1753. 1753.

Synonyms & Misapplications:
(none provided)
Infraspecies:
ssp. umbellatum – jagged-chickweed
Additional Resources:

PNW Herbaria: Specimen records of Holosteum umbellatum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Holosteum umbellatum checklist entry.

E-Flora BC: Holosteum umbellatum atlas page.

CalPhotos: Holosteum umbellatum photos.

USDA Plants: Holosteum umbellatum information.

17 photographs:
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