Potentilla arenosa subsp. chamissonis

(Hultén) Elven & D. F. Murray

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

Common names: Potentille de Chamisso
Basionyms: Potentilla chamissonis Hultén Bot. Not. 1945: 140, fig. 5b. 1945
Synonyms: P. hookeriana subsp. chamissonis (Hultén) Hultén P. nivea subsp. chamissonis (Hultén) Hiitonen
Treatment appears in FNA Volume 9. Treatment on page 200. Mentioned on page 201.

Petioles with only or almost only long verrucose hairs, sometimes mixed with sparse short and/or soft crisped hairs.


Phenology: Flowering summer.
Habitat: Cliffs, dry heath tundra, ridge tops
Elevation: 0–1000 m

Distribution

V9 303-distribution-map.jpg

Greenland, Man., N.W.T., Nunavut, Que., Europe

Discussion

Reports of subsp. chamissonis from Alaska or Yukon (E. Hultén 1968) have not been confirmed; they are unlikely.

The current use of subsp. chamissonis differs from that of J. Soják (1989, pers. comm.), who included Potentilla chamissonis among the hybrids of P. arenosa and P. nivea. He instead provided the combination P. nivea var. nipharga (Rydberg) Soják for the taxon currently under discussion, using P. nivea in its unconserved sense. He also noted, however, that P. nipharga Rydberg might instead be based on an unstabilized hybrid between P. arenosa and P. crebridens or P. nivea. The latter interpretation is provisionally accepted here; if treated as conspecific with P. arenosa, then P. nipharga would have priority. The name has traditionally been applied in Greenland and northeastern Canada; the type from the Mackenzie River does not conform with how the name has been used.

Selected References

None.

Lower Taxa

None.

"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 +
(Hultén) Elven & D. F. Murray +
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 chamissonis +
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 />) +
Potentille de Chamisso +
Greenland +, Man. +, N.W.T. +, Nunavut +, Que. +  and Europe +
not +  and aggregated +
0–1000 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 +
Cliffs, dry heath tundra, ridge tops +
stoloniferous +  and short-rhizomatous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
straight +
weak +  and stiff +
spreading +  and more or less ascending +
sparse +  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 />) +
0.05 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 />) +
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 />) +
free +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
more or less longer +
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 />) +
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 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 />) +
J. Bot. Res. Inst. Texas +
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 +
(2-)3-5 times basal leaves +
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 +
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 />) +
P. hookeriana subsp. chamissonis +  and P. nivea subsp. chamissonis +
not fleshy-thickened +
Potentilla arenosa subsp. chamissonis +
Potentilla arenosa +
subspecies +
3 +  and 4 +
inconspicuous +
enlarged +
biennial +, annual +  and perennial +