Minuartia arctica

(Steven ex Seringe) Graebner in P. F. A. Ascherson et al.

in P. F. A. Ascherson et al., Syn. Mitteleur. Fl. 5(1): 772. 1918.

Common names: Arctic stitchwort or sandwort
Basionym: Arenaria arctica Steven ex Seringe in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 1: 404. 1824
Synonyms: Alsine arctica (Steven ex Seringe) Fenzl Lidia arctica (Steven ex Seringe) Á. Löve & D. Löve
Treatment appears in FNA Volume 5. Treatment on page 120. Mentioned on page 116, 117, 118, 131.

Plants perennial, mat-forming. Taproots stout, woody. Stems erect to ascending, green, 3–10 cm, retrorsely puberulent or stipitate-glandular, internodes of flowering-stems 2–6 times as long as leaves. Leaves tightly overlapping (vegetative) or variably spaced (cauline), usually connate proximally, with tight, scarious to herbaceous sheath 1.2–1.5 mm; blade straight to outwardly curved, green, obscurely 1-veined, linear (proximal vegetative) or subulate (cauline), rounded 3-angled (abaxial surface thickened, rounded, adaxial surface flat to concave), 5–20 × 0.4–1 mm, flexuous, margins not thickened, herbaceous, often ciliate, apex often purple, rounded to truncate, shiny, glabrous (vegetative) or glabrous to stipitate-glandular (cauline); axillary leaves absent. Inflorescences: flowers solitary, terminal; bracts narrowly lanceolate to oblong, herbaceous. Pedicels 0.5–3 cm, usually densely stipitate-glandular. Flowers: hypanthium cupshaped; sepals prominently 3-veined proximally, lanceolate to narrowly ovate (herbaceous portion often purple, ovate to oblong), 4–8 mm, enlarging slightly in fruit, apex often purple, rounded, hooded, stipitate-glandular; petals oblanceolate, 1.5–2 times as long as sepals, apex broadly rounded, entire. Capsules narrowly ellipsoid, 9–10 mm, longer than sepals. Seeds brown, suborbiculate with radicle prolonged into beak, compressed, 1.2–1.6 mm, minutely tuberculate (50×). 2n = 22 (Russia), 26 (Russia), 38 (Russia), 52, ca. 80.


Phenology: Flowering summer.
Habitat: Dry ridges, rocky mountain slopes, heathlands, alpine snowbed slopes, stony tundra
Elevation: 0-1000 m

Distribution

V5 243-distribution-map.gif

N.W.T., Yukon, Alaska, Asia

Discussion

Minuartia arctica is an amphi-Beringian species that is known to intergrade with M. obtusiloba. Hybrids between M. arctica and M. macrocarpa are known as well.

Selected References

None.

Lower Taxa

None.

"-6timesaslongasleaves" 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 "Minuartia arctica"
80 +, 52 +, 38 +, 26 +  and 22 +
stipitate-glandular +  and glabrous +
Richard K. Rabeler +, Ronald L. Hartman +  and Frederick H. Utech +
(Steven ex Seringe) Graebner in P. F. A. Ascherson et al. +
Arenaria arctica +
flexuous +, straight +  and outwardly curved +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
3-angled +, rounded +, subulate +  and linear +
? (?) +  and ? (?) +
0.4mm;1mm +
narrowly lanceolate +  and oblong +
reduced +
scarious +  and herbaceous +
ellipsoid +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Arctic stitchwort or sandwort +
axillary +  and terminal +
dish--shaped +
expanded +
N.W.T. +, Yukon +, Alaska +  and Asia +
0-1000 m +
straight +  and curved +
central +  and peripheral +
axillary +  and terminal +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
Dry ridges, rocky mountain slopes, heathlands, alpine snowbed slopes, stony tundra +
disc--shaped +  and dish +
sessile +  and petiolate +
spaced +  and overlapping +
connate +
not thickened +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
reflexed;erect;arcuate-spreading +
stipitate-glandular +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Lilac (?) +, Pink (?) +  and White (?) +
fugacious +
Flowering summer. +
in P. F. A. Ascherson et al., Syn. Mitteleur. Fl. +
prolonged +
tuberculate +
compressed +  and suborbiculate +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
persistent +
distinct +
lanceolate;narrowly ovate +
enlarging +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
scarious +  and herbaceous +
branched +  and simple +
erect;ascending +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
[30 +  and 3 +
papillate +
distinct +
filiform +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Alsine arctica +  and Lidia arctica +
Minuartia arctica +
Minuartia +
species +
divided +
10 +  and 8 +
erect +  and recurved +
rhizomatous +  and taprooted +
plant +  and mat-forming +
pubescence of simple hairs or stalked glands +  and glabrous +
23 +, 15 +, 14 +, 13 +, 12 +, 10 +, 9 +  and 7 +