Cerastium fischerianum

Seringe in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 1: 419. 1824.

Common names: Fischer’s mouse-ear chickweed
Synonyms: Cerastium alpinum var. fischerianum (Seringe) Torrey & A. Gray Cerastium unalaschkense Takeda
Treatment appears in FNA Volume 5. Treatment on page 85. Mentioned on page 76, 82, 86.

Plants perennial, coarse, forming loose mats or clumps, ± rhizomatous. Stems erect-to-straggling, decumbent at base, sturdy, 10–50 cm, usually densely pubescent with hairs patent, yellowish, multicellular, glandular and eglandular, often subglabrous near base; nodes bearded with long, yellowish hairs; small axillary tufts of leaves usually absent. Leaves sessile, not marcescent; blade lanceolate, 7–50 × 3–15 mm, largest on mid and distal stem, apex usually acute, densely ciliate, hairs yellowish, multicellular, eglandular, of various lengths; proximal leaves with blade lanceolate to elliptic, oblanceolate, or oblong. Inflorescences lax, 2–10-flowered cymes, compact when young, branches elongating at maturity; proximal bracts foliaceous, herbaceous, pubescence as in leaves; distal bracts lanceolate, 5–10 mm, often with scarious tip, ciliate with long, fuscous hairs. Pedicels erect or becoming deflexed at base and curved at apex, 5–30 (–60) mm, elongating in fruit, ca. 6 times as long as sepals, densely fuscous-pubescent with glandular and eglandular, patent hairs. Flowers: sepals narrowly lanceolate with round base, 6–10 mm, margins narrow, apex acute, strigose-ciliate, hairs long, fuscous; petals conspicuous, 10–14 mm, 1.5–2 times as long as sepals, apex deeply 2-fid; stamens 10; styles 5. Capsules slightly conic or cylindric, straight, 10–22 mm, ca. 2 times as long as sepals; teeth 10, erect, margins convolute. Seeds reddish-brown, 1–1.5 mm diam., strongly papillate; testa not inflated, tightly enclosing seed. 2n = 66, 72.


Phenology: Flowering summer.
Habitat: Grassy areas, lake shores, riverbanks, gravel
Elevation: 0-200 m

Discussion

Cerastium fischerianum is a distinctive species resembling a large and robust form of C. fontanum. The bush of yellow hairs underneath each node, together with the large flowers, sepals, and capsule, distinguish this species. It intergrades with C. beeringianum, and the intermediate plants often have exceptionally large petals; these have been named C. beeringianum var. grandiflorum Hultén.

Selected References

None.

Lower Taxa

None.

"timesaslongassepals" is not declared as a valid unit of measurement for this property."-2timesaslongassepals" is not declared as a valid unit of measurement for this property.

... more about "Cerastium fischerianum"
perigynous +  and hypogynous +
strigose-ciliate +  and ciliate +
John K. Morton +
Seringe in A. P. de Candolle and A. L. P. P. de Candolle +
elliptic to broadly ovate +  and linear +
0.7 cm7 mm <br />0.007 m <br /> (5 cm50 mm <br />0.05 m <br />) +
lanceolate +  and elliptic oblanceolate or oblong +
largest +
3mm;15mm +
often +  and herbaceous +
reduced +
herbaceous +  and scarious +
elongating +
8 +  and 6 +
cylindric;conic +
1 cm10 mm <br />0.01 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Fischer’s mouse-ear chickweed +
2-10-flowered +
dish--shaped +
expanded +
B.C. +, Alaska +  and Asia +
0-200 m +
straight +  and curved +
central +  and peripheral +
pistillate +  and subsessile +
inconspicuous +
unisexual +  and bisexual +
6 times as long as sepals +
stalked +  and simple +
Grassy areas, lake shores, riverbanks, gravel +
eglandular +  and multicellular +
fuscous +  and yellowish +
disc--shaped +  and dish +
not marcescent +
connate +
translucent +  and purplish +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
elongating +
deflexed;erect +
fuscous-pubescent +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
perigynous +  and hypogynous +
fugacious +
conspicuous +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Flowering summer. +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
papillate +
compressed +  and angular-obovate +
persistent +
distinct +
lanceolate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
eglandular +  and multicellular +
erect;straggling +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 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 alpinum var. fischerianum +  and Cerastium unalaschkense +
rooting +  and rhizomatous +
Cerastium fischerianum +
Cerastium +
species +
not inflated +
scarious +
divided +
10 +  and 8 +
pubescence of simple hairs or stalked glands +  and glabrous +
19 +, 18 +, 17 +, 15] +, 13 +  and [9 +