Potentilla holmgrenii

D. F. Murray & Elven

J. Bot. Res. Inst. Texas 1: 811, figs. 1, 2. 2007.

Common names: Holmgren's cinquefoil
Conservation concernEndemic
Treatment appears in FNA Volume 9. Treatment on page 199. Mentioned on page 196, 197.

Plants densely tufted to cushion-forming. Caudex branches stout, columnar, at least partly sheathed with marcescent whole leaves. Stems ascending, 0.2–0.8 dm, lengths 1.5–2.5 times basal leaves. Basal leaves 1.5–4 cm; petiole 0.5–2 cm, long hairs absent or sparse to common (less so than cottony hairs), ± appressed, 1–2 mm, soft, smooth, cottony hairs dense, other hairs and glands absent, sparse, or obscured; leaflets touching to overlapping, central broadly elliptic to obovate, 0.7–1.1 × 0.5–0.6 cm, sessile or short-petiolulate, petiolule to 1 mm, base cuneate, margins revolute, distal 1/2–3/4 incised ± 1/2 to midvein, teeth 2–4 per side, approximate, surfaces ± dissimilar, abaxial white to grayish white, long hairs 1 mm, cottony-crisped hairs dense, adaxial grayish green to grayish white, long and short-crisped hairs abundant to dense. Cauline leaves 0–1. Inflorescences 1–2 (–3) -flowered. Pedicels 0.4–0.7 cm in flower, to 2 cm in fruit. Flowers: epicalyx bractlets lanceolate to narrowly elliptic, 2–2.2 × 0.6–0.9 mm, 1/4–1/2 as wide as sepals, margins flat, red-glands absent; hypanthium 1.8–2.2 mm diam.; sepals 3–3.5 mm, apex subacute; petals 4–5 × 2.5–4 mm, longer than sepals; filaments 1–1.5 mm, anthers 0.5 mm; carpels 30–40, apical hairs absent, styles narrowly columnar, not or ± papillate-swollen in proximal 1/5 or less, 1.2–1.4 mm. Achenes 1.1–1.4 mm.


Phenology: Flowering summer.
Habitat: Wind-swept ridges, fellfields, rocky slopes
Elevation: 3300–4500 m

Discussion

Of conservation concern.

Potentilla holmgrenii is known only from the Schell Creek and Snake ranges, Nevada, and Deep Creek Range, Utah. In addition to characteristics given in the key, lateral leaflets and leaflet teeth of P. holmgrenii are directed more forward than in P. nivea, leaflets are thicker and more densely hairy, and the terminal tooth is often orbiculate and frequently overlapped by the adjacent pair of lateral teeth.

Selected References

None.

Lower Taxa

None.

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

... more about "Potentilla holmgrenii"
reddish +, yellowish white +, gray +  and white +
cottony-crisped +
reddish +, yellowish white +, gray +  and white +
cottony-crisped +
white +  and grayish white +
cottony-crisped +
rugose +  and smooth +
1.1mm +  and 1.4mm +
grayish green +  and grayish white +
0.5 cm5 mm <br />0.005 m <br /> (?) +
Reidar Elven +, David F. Murray +  and Barbara Ertter +
D. F. Murray & Elven +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 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 +
Holmgren's cinquefoil +
Nev. +  and Utah. +
not +  and aggregated +
3300–4500 m +
0.2 cm2 mm <br />0.002 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
lanceolate +  and narrowly elliptic +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 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 +
Wind-swept ridges, fellfields, rocky slopes +
stoloniferous +  and short-rhizomatous +
straight +
less appressed +  and spreading +
abundant +, sparse +  and common +
short-crisped +  and cottony-crisped +
1 cm10 mm <br />0.01 m <br /> (0.1 cm1 mm <br />0.001 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 />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 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 +
short-petiolulate +  and sessile +
separate +  and overlapping +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
broadly elliptic +  and obovate +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 0.6 cm6 mm <br />0.006 m <br /> (?) +
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 /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
free +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 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 +
not arillate +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Conservation concern +  and Endemic +
free +  and distinct +
not rooting +
reddish +  and green +
1.5-2.5 times basal leaves +
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 columnar +
rough-thickened +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
not fleshy-thickened +
Potentilla holmgrenii +
Potentilla sect. Niveae +
species +
2 +  and 4 +
inconspicuous +
enlarged +
biennial +, annual +  and perennial +
plant +  and cushion-forming +