Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Disturbed, open areas in sagebrush desert, roadsides, fields, wastelots, and other disturbed areas.
Flowers: April-May
Origin: Introduced from Europe
Growth Duration: Annual
Conservation Status: Not of concern
Pollination: Bees, flies
Somewhat glandular-pubescent annual, the 1-several stems simple or basally branched, 5-20 cm. tall.
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 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.
Capsule ovoid-cylindric, twice as long as the calyx, opening by 6 valves.
Publication: Sp. Pl. 1: 88. 1753.
- ssp. umbellatum – jagged chickweed Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
PNW Herbaria: Specimen records of Holosteum umbellatum in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Holosteum umbellatum checklist entry.
OregonFlora: Holosteum umbellatum information.
E-Flora BC: Holosteum umbellatum atlas page.
CalPhotos: Holosteum umbellatum photos.
USDA Plants: Holosteum umbellatum information.
