Burke: Cerastium glomeratum vs. Cerastium dubium

	Cerastium glomeratum	Cerastium dubium
	sticky mouse-ear chickweed
Habit	Copiously glandular-pubescent annual, the 1-several erect to decumbent stems branched, 1-3 dm. long.
Leaves	Basal and lower cauline leaves spatulate to obovate, opposite, 8-15 mm. long and up to 8 mm. broad, tapered to the petiole; middle and upper cauline leaves larger, ovate to obovate, sessile.
Flowers	Flowers numerous, in tight clusters in an open inflorescence; pedicels shorter than the calyx; sepals 5, 4-5 mm. long, stiff-hairy; petals 5, white, equal to the sepals; stamens 10; styles 5.
Fruits	Capsule cylindric, twice as long as the calyx.

	Cerastium glomeratum	Cerastium dubium
Flowering time	March-July	May-July
Habitat	Prairies, balds, fields, roadsides, wastelots, and other disturbed areas at low to middle elevations.	Silty shores and other disturbed areas.
Distribution	Widely distributed on both sides of the Cascades crest in Washington, but more common west of the crest; Alaska to California, east across most of North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]	Occurring west of the Cascades crest in southwestern Washington; southwestern Washington to northwestern Oregon, also in western Idaho; eastern North America. [WildflowerSearch map] [BONAP county map]
Origin	Introduced from Europe	Introduced from Europe
Conservation status	Not of concern	Not of concern
Sibling taxa	C. arvense, C. beeringianum, C. brachypetalum, C. brachypodum, C. dichotomum, C. fontanum, C. nutans, C. pumilum, C. semidecandrum, C. tomentosum	C. arvense, C. beeringianum, C. brachypetalum, C. brachypodum, C. dichotomum, C. fontanum, C. glomeratum, C. nutans, C. pumilum, C. semidecandrum, C. tomentosum
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: OR Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Cerastium glomeratum

Cerastium dubium

sticky mouse-ear chickweed

Habit

Copiously glandular-pubescent annual, the 1-several erect to decumbent stems branched, 1-3 dm. long.

Leaves

Basal and lower cauline leaves spatulate to obovate, opposite, 8-15 mm. long and up to 8 mm. broad, tapered to the petiole; middle and upper cauline leaves larger, ovate to obovate, sessile.

Flowers

Flowers numerous, in tight clusters in an open inflorescence;

pedicels shorter than the calyx;

sepals 5, 4-5 mm. long, stiff-hairy;

petals 5, white, equal to the sepals;

stamens 10;

styles 5.

Fruits

Capsule cylindric, twice as long as the calyx.

Cerastium glomeratum

Cerastium dubium

Flowering time

March-July

May-July

Habitat

Prairies, balds, fields, roadsides, wastelots, and other disturbed areas at low to middle elevations.

Silty shores and other disturbed areas.

Distribution

Widely distributed on both sides of the Cascades crest in Washington, but more common west of the crest; Alaska to California, east across most of North America to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Occurring west of the Cascades crest in southwestern Washington; southwestern Washington to northwestern Oregon, also in western Idaho; eastern North America.

[WildflowerSearch map]

[BONAP county map]

Origin

Introduced from Europe

Conservation status

Not of concern

Sibling taxa