Arenaria longipedunculata

Hultén

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

... more about "Arenaria longipedunculata"
Ronald L. Hartman +, Richard K. Rabeler +  and Frederick H. Utech +
Hultén +
Longstem sandwort +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +  and Asia. +
50-1000 m +
Gravelly, moist, montane areas, open alpine woods +
Flowering spring–summer. +
Spergulastrum +
Arenaria longipedunculata +
Arenaria +
species +