UW Burke Herbarium species comparison

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Holosteum umbellatum

jagged-chickweed
Habit 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.

Holosteum umbellatum
Flowering time April-May
Habitat Disturbed, open areas in sagebrush desert, roadsides, fields, wastelots, and other disturbed areas.
Distribution
Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Introduced from Europe
Conservation status Not of concern
Subordinate taxa
H. umbellatum ssp. umbellatum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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