Potentilla vulcanicola

Juzepczuk

Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk SSSR 17: 222. 1955.

Treatment appears in FNA Volume 9. Treatment on page 203. Mentioned on page 196, 197, 202.

Plants densely tufted. Caudex branches stout, sometimes ± columnar, not sheathed with marcescent whole leaves. Stems ascending to erect, (0.2–) 0.4–1.6 (–2) dm, lengths 2–3 times basal leaves. Basal leaves 1–6 (–11) cm; petiole 0.5–4 (–9) cm, long hairs ± abundant, ascending to spreading, sometimes loosely appressed, 1–2.5 mm, soft to weak, smooth, crisped (/cottony) hairs absent or sparse, sometimes common, glands absent or sparse; leaflets overlapping, central broadly obovate, 0.8–2 (–2.5) × 0.8–1.5 (–2.5) cm, sessile or subsessile, base broadly cuneate, margins strongly revolute, distal 1/2–2/3 incised ± 1/2 to midvein, teeth 2–3 (–4) per side, distant, surfaces strongly dissimilar, abaxial grayish white, long hairs 1–2 mm, cottony-crisped hairs ± dense, adaxial usually dark green, sometimes grayish green, long hairs sparse to abundant, other hairs usually absent. Cauline leaves (0–) 1–2 (–3). Inflorescences 1–2 (–5) -flowered. Pedicels 1–2 cm in flower, to 5 cm in fruit. Flowers: epicalyx bractlets ± oblong to ovate, 4–8 (–10) × 1.8–3 (–5) mm, 2/3 to as wide as sepals, margins revolute, sometimes flat, red-glands absent; hypanthium 3.5–4.5 mm diam.; sepals 5–8 mm, apex ± acute; petals 7–9 × 7–10 mm, longer than sepals; filaments 0.8–1 mm, anthers 0.6–0.7 mm; carpels 20–30, apical hairs sparse to abundant (straight), styles conic-columnar, ± papillate-swollen in less than proximal 1/5, or sometimes to 1/5, 0.8–1.1 mm. Achenes 0.9–1.2 mm. 2n = 28 (Russian Far East).


Phenology: Flowering late spring to summer.
Habitat: Dry alpine heaths, ridge crests, rock outcrops, herb slopes, scree and talus, stabilized sand dunes, mainly on calcareous bedrock
Elevation: 0–3100 m

Distribution

V9 307-distribution-map.jpg

N.W.T., Nunavut, Yukon, Alaska, e Asia (Russian Far East)

Discussion

Potentilla vulcanicola is close morphologically to P. uniflora in the narrow sense and largely replaces it in southern and eastern Chukotka, Alaska, and northwestern Canada, where it reaches east of Mackenzie River on the coastal mainland and the westernmost islands (Banks and Victoria islands). Potentilla subgorodkovii and P. vulcanicola account for a major part of North American records of P. uniflora.

Selected References

None.

Lower Taxa

None.

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

... more about "Potentilla vulcanicola"
reddish +, yellowish white +, gray +  and white +
cottony-crisped +
reddish +, yellowish white +, gray +  and white +
cottony-crisped +
cottony-crisped +
rugose +  and smooth +
0.9mm +  and 1.2mm +
grayish green +  and dark green +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
sparse +  and abundant +
Reidar Elven +, David F. Murray +  and Barbara Ertter +
Juzepczuk +
compound +  and simple +
6 cm60 mm <br />0.06 m <br /> (11 cm110 mm <br />0.11 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
cuneate +
Niveae +
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 +
subsessile +  and sessile +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
N.W.T. +, Nunavut +, Yukon +, Alaska +  and e Asia (Russian Far East) +
not +  and aggregated +
0–3100 m +
0.8 cm8 mm <br />0.008 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 />) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
less oblong +  and ovate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 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 +
Dry alpine heaths, ridge crests, rock outcrops, herb slopes, scree and talus, stabilized sand dunes, mainly on calcareous bedrock +
stoloniferous +  and short-rhizomatous +
straight +
ascending +  and spreading +
sparse +  and abundant +
cottony-crisped +  and crisped +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 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 />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 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 +
obtriangular +, suborbiculate +, elliptic +  and obovate +
linear +  and oblanceolate +
palmate +  and pinnate +
1/2 +  and 2/3 +
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 /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
free +  and distinct +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering late spring to 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 />) +
Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk SSSR +
not arillate +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
free +  and distinct +
not rooting +
reddish +  and green +
2-3 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 +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
not fleshy-thickened +
Potentilla vulcanicola +
Potentilla sect. Niveae +
species +
2 +  and 3 +
inconspicuous +
enlarged +
biennial +, annual +  and perennial +