Cerastium brachypetalum

Persoon

Syn. Pl. 1: 520. 1805.

Common names: Gray mouse-ear chickweed
Introduced
Synonyms: Cerastium brachypetalum subsp. tauricum (Sprengel) Murbeck Cerastium tauricum
Treatment appears in FNA Volume 5. Treatment on page 82. Mentioned on page 75, 83, 85.

Plants annual. Stems erect, simple or branched at base, 5.5–30 cm, shaggy, hairs silvery, spreading-ascending; small axillary tufts of leaves absent. Leaves not marcescent; blade 4–15 (–20) × 1.5–5 (–7) mm, pubescence of long, glandular and/or eglandular hairs; basal ± crowded, blade oblanceolate, spatulate, apex obtuse; cauline sessile, blade lanceolate or elliptic, apex acute. Inflorescences lax, dichasiate, 3–30-flowered cymes; bracts herbaceous, lanceolate, densely pubescent, with long, ascending, glandular or eglandular hairs. Pedicels erect or ascending, bent distally in fruit, 6–15 mm, longer than capsule, shaggy, glandular or eglandular. Flowers: sepals lanceolate, 4–4.5 mm, foliaceous, with or without narrow margins, densely pubescent, hairs exceeding sepal tips; petals oblanceolate, 2–3 mm, ca. 0.5 times as long as sepals, apex 2-fid, sparsely ciliate proximally; stamens 10, with few long hairs near filament base; styles 5. Capsules cylindric, slightly curved near apex, 5–7 mm, ca. 1.5 times as long as sepals; teeth 10, erect, margins convolute. Seeds pale-brown, 0.5 mm diam., acutely tuberculate; testa not inflated. 2n = 72 (Europe), 88, 90.


Phenology: Flowering spring.
Habitat: Dry, sandy places, roadsides, arable land, disturbed, open areas
Elevation: 0-400 m

Distribution

V5 168-distribution-map.gif

Introduced; Ala., Ark., Fla., Ga., Idaho, Ill., Ind., Kans., Ky., Miss., Mo., N.Y., N.C., Ohio, Okla., Oreg., Pa., S.C., Tenn., Tex., Va., W.Va., Eurasia

Discussion

The wholly herbaceous bracts of Cerastium brachypetalum distinguish it from C. fontanum subsp. vulgare, C. semidecandrum, and C. pumilum; the ciliate petal and filament bases distinguish it from C. diffusum and C. glomeratum. Cerastium brachypetalum differs from all those species in the long, silvery hairs that give it a grayish appearance. In Europe C. brachypetalum is more variable and eight subspecies have been recognized, two of which—subsp. brachypetalum and subsp. tauricum—occur in North America. However, they differ only in the absence or presence of glandular hairs, an insufficient distinction for recognition at the subspecific level.

Selected References

None.

Lower Taxa

None.

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

... more about "Cerastium brachypetalum"
90 +, 88 +  and 72 +
perigynous +  and hypogynous +
John K. Morton +
Persoon +
elliptic to broadly ovate +  and linear +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
elliptic +, lanceolate +, spatulate +  and oblanceolate +
1.5mm;5mm +
lanceolate +
reduced +
herbaceous +  and scarious +
8 +  and 6 +
cylindric +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Gray mouse-ear chickweed +
3-30-flowered +
dish--shaped +
expanded +
Ala. +, Ark. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Kans. +, Ky. +, Miss. +, Mo. +, N.Y. +, N.C. +, Ohio +, Okla. +, Oreg. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +, W.Va. +  and Eurasia +
0-400 m +
straight +  and curved +
central +  and peripheral +
pistillate +  and subsessile +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
Dry, sandy places, roadsides, arable land, disturbed, open areas +
eglandular +  and glandular +
ascending +  and spreading-ascending +
disc--shaped +  and dish +
sessile +  and petiolate +
not marcescent +
connate +
translucent +  and purplish +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
eglandular +  and glandular +
ascending;erect +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
perigynous +  and hypogynous +
fugacious +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering spring. +
0.5 cm5 mm <br />0.005 m <br /> (?) +
tuberculate +
compressed +  and angular-obovate +
persistent +
distinct +
lanceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Introduced +
branched +  and simple +
5.5 cm55 mm <br />0.055 m <br /> (30 cm300 mm <br />0.3 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 brachypetalum subsp. tauricum +  and Cerastium tauricum +
rooting +  and rhizomatous +
Cerastium brachypetalum +
Cerastium +
species +
not inflated +
divided +
10 +  and 8 +
rhizomatous +  and taprooted +
pubescence of simple hairs or stalked glands +  and glabrous +
19 +, 18 +, 17 +, 15] +, 13 +  and [9 +