Arenaria pseudofrigida

(Ostenfeld & Dahl) Schischkin & Knorring in V. L. Komarov et al.

in V. L. Komarov et al., Fl. URSS 6: 537. 1936.

Basionym: Arenaria ciliata subsp. pseudofrigida Ostenfeld & Dahl Nyt Mag. Naturvidensk. 55: 217. 1918
Synonyms: Arenaria ciliata var. pseudofrigida (Ostenfeld & Dahl) B. Boivin
Treatment appears in FNA Volume 5. Treatment on page 55. Mentioned on page 52.

Plants perennial, forming cushions or mats. Taproots filiform to somewhat thickened. Stems 20–40+, procumbent, green, 3–14 cm; internodes terete to angular, 1/2–1+ times as long as leaves, shiny, pubescent in lines or throughout, hairs retrorsely curved. Leaves connate basally, with scarious sheath 0.2–0.3 mm, sessile; blade 1-veined (prominent proximally), oblanceolate to spatulate, 2–6 × 0.8–1.8 mm, succulent, margins thickened, minutely scarious-granular, ± shiny, ciliate in proximal 1/2, apex ± obtuse, sometimes pustulate, glabrous; axillary leaf clusters absent. Inflorescences terminal or axillary, open, leafy, 1–4-flowered cymes in distal leaf-axils. Pedicels erect or nodding in fruit, 2–12 mm, retrorsely pubescent. Flowers: sepals green or distally purple, 3-veined (2 lateral-veins 1/2 times as long as midvein), sometimes keeled, narrowly lanceolate (herbaceous portion narrowly lanceolate), 3–4 mm, to ca. 5 mm in fruit, apex ± acute, not pustulate, glabrous or sparsely stipitate-glandular; petals obovate, 5–8 mm, 12/3–2 times as long as sepals, apex acute to rounded. Capsules tightly enclosed by calyx, narrowly ellipsoid to cylindric, 3–5 mm, ca. equaling sepals. Seeds 15–20, black to reddish-brown, reniform, compressed, 0.8–0.9 mm, shiny, low-tuberculate. 2n = 40.


Phenology: Flowering spring–summer.
Habitat: Open, dry to slightly moist sand or gravel
Elevation: 0-50 m

Discussion

We follow B. Jonsell (2001) in treating Arenaria pseudofrigida as one of several arctic species that formerly were included in A. ciliata Linnaeus, a species now considered restricted to alpine regions of central Europe.

Selected References

None.

Lower Taxa

None.

"/2-1+timesaslongasleaves" is not declared as a valid unit of measurement for this property."/3-2timesaslongassepals" is not declared as a valid unit of measurement for this property.

... more about "Arenaria pseudofrigida"
stipitate-glandular +  and glabrous +
not pustulate +  and pustulate +
Ronald L. Hartman +, Richard K. Rabeler +  and Frederick H. Utech +
(Ostenfeld & Dahl) Schischkin & Knorring in V. L. Komarov et al. +
Arenaria ciliata subsp. pseudofrigida +
Laciniate (?) +, Emarginate (?) +, Jagged (?) +, 2-fid (?) +  and Entire (?) +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
oblanceolate +  and spatulate +
0.8mm;1.8mm +
smaller +
herbaceous +  and scarious +
narrowly ellipsoid;cylindric +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1-4-flowered +
dish--shaped +
expanded +
Greenland +  and Europe +
0-50 m +
straight +  and curved +
central +  and peripheral +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
Open, dry to slightly moist sand or gravel +
disc--shaped +  and dish +
leafy +  and open +
axillary +  and terminal +
terete +  and angular +
connate +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
nodding;erect +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
fugacious +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering spring–summer. +
in V. L. Komarov et al., Fl. URSS +
low-tuberculate +
compressed +  and reniform +
purple +  and green +
persistent +
connate +  and distinct +
lanceolate;keeled +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
grooved +, branched +  and simple +
prostrate;ascending or erect +
terete;ellipsoid +
3 cm30 mm <br />0.03 m <br /> (14 cm140 mm <br />0.14 m <br />) +
[30 +  and 3 +
papillate +
distinct +
filiform +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Arenaria ciliata var. pseudofrigida +
Arenaria pseudofrigida +
Arenaria +
species +
ascending;recurved +
divided +
10 +  and 8 +
rhizomatous +  and taprooted +
pubescence of simple hairs or stalked glands +  and glabrous +
11 +, 10 +, 8 +  and [7 +