Potentilla hyparctica subsp. elatior

(Abromeit) Elven & D. F. Murray

J. Bot. Res. Inst. Texas 1: 813. 2007.

Common names: Grande potentille subarctique
Basionym: Potentilla emarginata var. elatior Abromeit Biblioth. Bot. 8(heft 42): 8. 1897
Synonyms: P. flabellifolia var. emarginata (Seringe) B. Boivin P. hyparctica var. elatior (Abromeit) Fernald
Treatment appears in FNA Volume 9. Treatment on page 194. Mentioned on page 193.

Plants: hairs usually sparse, sometimes common to abundant. Stems 0.4–2 (–2.5) dm. Central leaflets broadly obovate, petiolule (0–) 2–3 (–5) mm, base broadly cuneate to rounded, teeth broadly oblong, tooth apex obtuse to rounded. Inflorescences 1–3 (–5) -flowered. Flowers: epicalyx bractlets broadly oblong or ovate, 2–5 mm wide; sepals: apex obtuse to rounded. 2n = 42.


Phenology: Flowering late spring–summer.
Habitat: Damp ericaceous heath, snow patch meadows, damp arctic and alpine tundra, rocky outcrops, solifluction slopes, talus, mainly acidic bedrock
Elevation: 0–4000 m

Distribution

V9 293-distribution-map.jpg

Greenland, Alta., B.C., Nfld. and Labr. (Labr.), N.W.T., Nunavut, Que., Yukon, Alaska, Mont., Wash., Wyo., Asia (Russian Far East)

Discussion

Geographically isolated and morphologically deviant plants from alpine sites in Montana (Beartooth Mountains), Washington (Mount Baker), and Wyoming (Sublette County) are provisionally assigned to subsp. elatior but likely represent a segregate race. These plants are exceptionally compact and hairy, with leaflets usually lacking petiolules.

Potentilla emarginata Pursh (1813), sometimes used for this taxon, is an illegitimate later homonym of P. emarginata Desfontaines (1804).

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.

grayish +  and pale green +
pale +  and dark green rarely grayish brownish or reddish +
1.1mm +  and 1.3mm +
green +  and dark green rarely brownish or reddish +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Reidar Elven +, Barbara Ertter +, David F. Murray +  and James L. Reveal +
(Abromeit) Elven & D. F. Murray +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
broadly cuneate +  and rounded +
Potentilla emarginata var. elatior +
25 cm250 mm <br />0.25 m <br /> (30 cm300 mm <br />0.3 m <br />) +
less cordate or reniform +  and narrowly elliptic +
0.5 cm5 mm <br />0.005 m <br /> (25 cm250 mm <br />0.25 m <br />) +
reduced +
free +  and distinct +
hairy +  and glabrous +
slender +, short +  and elongate +
2.5 cm25 mm <br />0.025 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
2 cm20 mm <br />0.02 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Grande potentille subarctique +
Greenland +, Alta. +, B.C. +, Nfld. and Labr. (Labr.) +, N.W.T. +, Nunavut +, Que. +, Yukon +, Alaska +, Mont. +, Wash. +, Wyo. +  and Asia (Russian Far East) +
not +  and aggregated +
0–4000 m +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
ovate +  and oblong +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
5-merous +, solitary +  and open +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
deciduous +
on style scar +, hairy +  and glabrous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Damp ericaceous heath, snow patch meadows, damp arctic and alpine tundra, rocky outcrops, solifluction slopes, talus, mainly acidic bedrock +
stoloniferous +  and short-rhizomatous +
straight +
weak +  and more or less stiff +
spreading +  and subappressed +
common +  and abundant +
crisped +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
not differentiated +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
crassinucellate +
bipinnate +, odd-pinnate +, subpalmate +, palmate +  and ternate +
opposite +  and alternate +
marcescent +
well-developed +
persistent +
cauline +  and basal +
reduced +
not +  and overlapping +
obtriangular +  and flabellate +
linear +  and oblanceolate +
palmate +  and pinnate +
1/2 +  and 2/3-3/4 +
incised +, not lobed +, revolute +  and flat +
inferior +  and superior +
clustered +, biseriate +  and superposed +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0 cm0 mm <br />0 m <br /> (9 cm90 mm <br />0.09 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
free +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
usually longer +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
6.5 cm65 mm <br />0.065 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering late spring–summer. +
adnate +, free +, connate +  and distinct +
palmate +  and ternate +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1 cm10 mm <br />0.01 m <br /> (12 cm120 mm <br />0.12 m <br />) +
usually not much longer +
J. Bot. Res. Inst. Texas +
not arillate +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Illustrated +
free +  and distinct +
not rooting +
reddish +  and green +
1-3(-4) times basal leaves +
ascending +  and erect +
1 +  and many +
not flagelliform +
palmate +  and pinnate +
deciduous +
distinct +
subapical +
papillate-swollen +  and columnar +
rough-thickened +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
P. flabellifolia var. emarginata +  and P. hyparctica var. elatior +
not fleshy-thickened +
Potentilla hyparctica subsp. elatior +
Potentilla hyparctica +
subspecies +
3 +  and 5 +
inconspicuous +
enlarged +
matted +  and cushion-forming +
biennial +, annual +  and perennial +