Arenaria longipedunculata

Hultén

Bot. Not. 119: 313, fig. 1. 1966.

Common names: Longstem sandwort
Treatment appears in FNA Volume 5. Treatment on page 54. Mentioned on page 52, 53.

Plants perennial, tufted to mat-forming. Taproots filiform; rhizomes slender, 0.5–3 cm. Stems 25–60+, erect to ascending, green, 2–4 cm; internodes terete, 1–4 times as long as leaves, shiny, minutely glandular-villous. Leaves briefly connate basally, with herbaceous sheath 0.1–0.3 mm, sessile; blade obscurely 1-veined, narrowly elliptic to lanceolate or ovate, 2–6 × 1–1.5 mm, subsucculent, margins thickened, herbaceous, shiny, ciliate proximally, apex acute to apiculate, pustulate, glabrous; axillary leaf clusters absent. Inflorescences terminal, solitary flowers. Pedicels erect in fruit, 10–20 mm, densely glandular-villous. Flowers: sepals green, obscurely veined, not keeled, ovate (herbaceous portion ovate), 3.5–4 mm, not enlarging in fruit, apex acute to acuminate, not pustulate, minutely stipitate-glandular proximally; petals broadly elliptic, 2.5–3.5 mm, 11/4–11/2 times as long as sepals, apex rounded. Capsules tightly enclosed by calyx, ellipsoid, 4–5 mm, 1–11/5 times as long as sepals. Seeds 13–20, brown, reniform, compressed, 0.7–0.9 mm, shiny, rugulose (30×). 2n = 40, 80.


Phenology: Flowering spring–summer.
Habitat: Gravelly, moist, montane areas, open alpine woods
Elevation: 50-1000 m

Distribution

V5 107-distribution-map.gif

Alta., B.C., N.W.T., Yukon, Alaska, Asia

Discussion

Arenaria longipedunculata was for many years included in A. humifusa.

Selected References

None.

Lower Taxa

None.

"-11/5timesaslongassepals" is not declared as a valid unit of measurement for this property."-4timesaslongasleaves" is not declared as a valid unit of measurement for this property."/4-11/2timesaslongassepals" is not declared as a valid unit of measurement for this property.

... more about "Arenaria longipedunculata"
stipitate-glandular +  and glabrous +
not pustulate +  and pustulate +
Ronald L. Hartman +, Richard K. Rabeler +  and Frederick H. Utech +
Hultén +
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 />) +
narrowly elliptic +  and lanceolate or ovate +
1mm;1.5mm +
smaller +
herbaceous +  and scarious +
ellipsoid +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Longstem sandwort +
dish--shaped +
expanded +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +  and Asia +
50-1000 m +
straight +  and curved +
central +  and peripheral +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
Gravelly, moist, montane areas, open alpine woods +
disc--shaped +  and dish +
glandular-villous +
connate +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
glandular-villous +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
fugacious +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Flowering spring–summer. +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
[30;13;20 +
rugulose +
compressed +  and reniform +
persistent +
connate +  and distinct +
ovate;not keeled +
not enlarging +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
grooved +, branched +  and simple +
erect;ascending +
terete;ellipsoid +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 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 />) +
Spergulastrum +
Arenaria longipedunculata +
Arenaria +
species +
ascending;recurved +
divided +
10 +  and 8 +
rhizomatous +  and taprooted +
plant +  and mat-forming +
pubescence of simple hairs or stalked glands +  and glabrous +
11 +, 10 +, 8 +  and [7 +