Potentilla arenosa subsp. arenosa

Treatment appears in FNA Volume 9. Treatment on page 200. Mentioned on page 201, 210.

Petioles with both long verrucose hairs and a lower layer of common to abundant short and/or stiff crisped hairs. 2n = 28; 42, 49, 56, 70 (Asia).


Phenology: Flowering spring–summer.
Habitat: Well-drained gravel, ridge tops, cliffs, dry soil banks, dry tundra
Elevation: 0–1400 m

Distribution

V9 302-distribution-map.jpg

Greenland, Alta., B.C., Man., N.W.T., Nunavut, Sask., Yukon, Alaska, Asia (Siberia)

Discussion

Plants of subsp. arenosa from Alaska and Yukon tend to be larger, with more open inflorescences and more distinctly petiolulate central leaflets, than plants in north-central Canada. Some collections from the range of Potentilla furcata (sect. Rubricaules) have red glands in the inflorescence, suggesting introgression between P. arenosa and P. furcata. Reported occurrences in Alberta and Saskatchewan (and the upper altitudinal limit given here) might actually be P. hookeriana as now circumscribed.

Selected References

None.

Lower Taxa

None.

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

reddish +, yellowish white +, gray +  and white +
cottony-crisped +
reddish +, yellowish white +, gray +  and white +
cottony-crisped +
white +  and gray +
cottony-crisped +
rugose +  and smooth +
grayish green +  and green +
0.4 cm4 mm <br />0.004 m <br /> (?) +
Reidar Elven +, David F. Murray +  and Barbara Ertter +
(Turczaninow) Juzepczuk in V. L. Komarov et al. +
compound +  and simple +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (12 cm120 mm <br />0.12 m <br />) +
cuneate +
Potentilla nivea var. arenosa +
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 />) +
coriaceous +
reduced +
free +  and distinct +
hairy +  and glabrous +
3.5 cm35 mm <br />0.035 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Greenland +, Alta. +, B.C. +, Man. +, N.W.T. +, Nunavut +, Sask. +, Yukon +, Alaska +  and Asia (Siberia) +
not +  and aggregated +
0–1400 m +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
linear-lanceolate +  and lanceolate-elliptic +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
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 />) +
crisped +
Well-drained gravel, ridge tops, cliffs, dry soil banks, dry tundra +
stoloniferous +  and short-rhizomatous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
straight +
spreading +  and more or less ascending +
common +  and abundant +
verrucose +
crisped +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
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 />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.5mm;2.5mm +
turbinate +, patelliform +  and cupulate +
1-7(-15)-flowered +
crassinucellate +
bipinnate +, odd-pinnate +, subpalmate +, palmate +  and ternate +
opposite +  and alternate +
marcescent +
well-developed +
persistent +
cauline +  and basal +
reduced +
separate +  and more or less overlapping +
obtriangular +, suborbiculate +, elliptic +  and obovate +
linear +  and oblanceolate +
palmate +  and pinnate +
1/2 (?) +  and 3/4 (?) +
inferior +  and superior +
clustered +, biseriate +  and superposed +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
pale-yellow +  and yellow +
free +  and distinct +
more or less longer +
obcordate +
0.4 cm4 mm <br />0.004 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 />) +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
70 +, 56 +  and 49 +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering 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 />) +
in V. L. Komarov et al., Fl. URSS +
inconspicuous +
not arillate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
free +  and distinct +
not rooting +
reddish +  and green +
ascending +  and erect +
1 +  and many +
not flagelliform +
palmate +  and pinnate +
linear;ovate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
deciduous +
distinct +
proximal +  and subapical +
not;1/3;1/2 +
papillate-swollen +  and conic-columnar +
rough-thickened +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
not fleshy-thickened +
Potentilla arenosa subsp. arenosa +
Potentilla arenosa +
subspecies +
less approximate;distant +
3 (?) +  and 4 (?) +
inconspicuous +
enlarged +
biennial +, annual +  and perennial +