Cerastium dubium

(Bastard) Guépin

Fl. Maine et Loire ed. 2, 1: 267. 1838.

Common names: Anomalous mouse-ear chickweed
Introduced
Basionym: Stellaria dubia Bastard Suppl. Fl. Maine-et-Loire, 24. 1812
Synonyms: Cerastium anomalum Waldstein & Kitaibel Dichodon viscidum (M. Bieberstein) Holub
Treatment appears in FNA Volume 5. Treatment on page 85. Mentioned on page 75.

Plants annual, taprooted. Stems erect, many-branched from base, 10–40 cm, minutely viscid-glandular; small axillary tufts of leaves usually absent. Leaves not marcescent, distal sessile, proximal spatulate; blade linear or linear-lanceolate to linear-oblong, 10–30 × 1–4 mm, apex obtuse to subacute, glabrous or sparsely and minutely viscid-glandular. Inflorescences lax, 3–21 (–30) -flowered cymes; bracts narrowly lanceolate, glandular-pubescent. Pedicels erect, slender, 2–15 mm, 0.5–3 times as long as sepals, glandular-puberulent Flowers: sepals ovatelanceolate, 5–6 mm, margins narrow, apex acute to obtuse, minutely viscid-glandular; petals oblanceolate, 5–8 mm, 1.5 times as long as sepals, apex 2-fid; stamens 10; styles 3 (–4). Capsules oblong-ovoid, straight, 8–11 mm, ca. 2 times as long as sepals; teeth 6, occasionally 8, erect to spreading, margins convolute. Seeds pale-brown, ovate, 0.6 mm diam., tuberculate; testa not inflated. 2n = 36, 38.


Phenology: Flowering spring.
Habitat: Alien weed of cultivated land
Elevation: 200-800 m

Distribution

V5 173-distribution-map.gif

Introduced; Ark., Idaho, Ill., Ind., Kans., Ky., Miss., Ohio, Oreg., Tenn., Va., Wash., s Europe, Asia

Discussion

First collected in North America in 1966 in Washington, Cerastium dubium has now been gathered from many widely scattered sites, and appears to be spreading rapidly.

Lower Taxa

None.

"timesaslongassepals" is not declared as a valid unit of measurement for this property."-3timesaslongassepals" is not declared as a valid unit of measurement for this property. "-3timesaslongassepals" is not declared as a valid unit of measurement for this property. "-3timesaslongassepals" is not declared as a valid unit of measurement for this property. "-3timesaslongassepals" is not declared as a valid unit of measurement for this property.

... more about "Cerastium dubium"
perigynous +  and hypogynous +
sparsely +  and glabrous +
2-fid;acute;obtuse +
John K. Morton +
(Bastard) Guépin +
Stellaria dubia +
elliptic to broadly ovate +  and linear +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
linear-lanceolate +  and linear-oblong +
not succulent +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
often +  and herbaceous +
glandular-pubescent +
lanceolate +
reduced +
herbaceous +  and scarious +
8 +  and 6 +
oblong-ovoid +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Anomalous mouse-ear chickweed +
3-21(-30)-flowered +
dish--shaped +
expanded +
Ark. +, Idaho +, Ill. +, Ind. +, Kans. +, Ky. +, Miss. +, Ohio +, Oreg. +, Tenn. +, Va. +, Wash. +, s Europe +  and Asia +
200-800 m +
straight +  and curved +
central +  and peripheral +
pistillate +  and subsessile +
inconspicuous +
glandular-puberulent +
unisexual +  and bisexual +
stalked +  and simple +
Alien weed of cultivated land +
disc--shaped +  and dish +
sessile +  and petiolate +
not marcescent +
connate +
translucent +  and purplish +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
erect;erect;erect;erect +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
perigynous +  and hypogynous +
fugacious +
1.5 times as long as sepals +
oblanceolate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering spring. +
Fl. Maine et Loire ed. +
shildneck1986a +
pale-brown +
tuberculate +
persistent +
distinct +
ovatelanceolate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Introduced +
many-branched +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
subterminal +
[30 +  and 5 +
roughened +  and papillate +
distinct +
clavate +  and filiform +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Cerastium anomalum +  and Dichodon viscidum +
rooting +  and rhizomatous +
Cerastium dubium +
Cerastium +
species +
not inflated +
erect;spreading +
8 (?) +  and 6 (?) +
divided +
10 +  and 8 +
pubescence of simple hairs or stalked glands +  and glabrous +
19 +, 18 +, 17 +, 15] +, 13 +  and [9 +