Potentilla canadensis

Linnaeus

Sp. Pl. 1: 498. 1753.

Common names: Dwarf cinquefoil
Endemic
Synonyms: Potentilla canadensis var. pumila (Poiret) Torrey & A. Gray P. canadensis var. villosissima Fernald P. caroliniana P. pumila
Treatment appears in FNA Volume 9. Treatment on page 134. Mentioned on page 135.

Rootstocks erect, stout, 0.5–2 cm. Stems initially ascending to erect, soon becoming prostrate, flagelliform, not branched, eventually rooting at some nodes, (0.3–) 0.5–12 dm. Basal leaves ± persistent, usually palmate, 2–9 (–11) cm; petiole 1–7 (–8) cm, long hairs abundant to dense, appressed to spreading, 1.5–3 mm, mostly ± weak, glands absent or sparse; leaflets (3–) 5 (–7), central mostly ± obovate to cuneate, sometimes narrowly so, (0.5–) 1–4 (–6) × (0.5–) 0.8–2 (–3) cm, distal 1/2 of margin incised 1/4–1/3 to midvein, teeth 2–7 per side, surfaces similar to ± dissimilar, abaxial green to silvery white, sparsely to densely hairy, adaxial green, sparsely to moderately hairy. Cauline leaves 0–1 proximal to 1st flowering node, not fully expanded at anthesis, usually palmate, 2–7 (–9) cm; petiole (0.5–) 1–6 (–7.5) cm; leaflets (3–) 5, ± resembling those of basal leaves, apex rounded to obtuse. Inflorescences solitary flowers at stolon nodes. Pedicels (1–) 2–5 (–9) cm. Flowers 5-merous; epicalyx bractlets linear to lanceolate-elliptic, (2–) 3–5 (–6) × 0.8–1.5 mm, slightly smaller than to ± equal to sepals; hypanthium 2.5–5 mm diam.; sepals (2–) 3–5 (–6) mm, apex acute; petals 4–6 (–8) × 3.5–6.5 (–8) mm, apex rounded to slightly retuse; stamens ca. 20, filaments 0.5–2 mm, anthers 0.4–1 mm; carpels 20–40, styles 0.8–1.4 mm. Achenes 1.2–1.4 mm, smooth. 2n = 28.


Phenology: Flowering late Mar–early Jun.
Habitat: Dry flats and slopes in lawns, pastures, roadsides, cherty slopes, dry meadows, edges of oak and conifer woodlands, often on acidic soil
Elevation: 0–1500 m

Distribution

V9 191-distribution-map.jpg

N.S., Ont., Conn., Del., D.C., Ky., Maine, Md., Mass., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va.

Discussion

A cream-colored form (ochroleuca) was described from a now-obliterated site in Massachusetts (M. L. Fernald 1931).

Selected References

None.

Lower Taxa

None.

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

... more about "Potentilla canadensis"
green +  and silvery white +
silvery white +  and green +
rugose +  and smooth +
1.2mm +  and 1.4mm +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Barbara Ertter +  and James L. Reveal +
Linnaeus +
opposite +  and alternate +
9 cm90 mm <br />0.09 m <br /> (11 cm110 mm <br />0.11 m <br />) +
2 cm20 mm <br />0.02 m <br /> (9 cm90 mm <br />0.09 m <br />) +
ephemeral +  and persistent +
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 +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 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 /> (4 cm40 mm <br />0.04 m <br />) +
less obovate +  and cuneate +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Dwarf cinquefoil +
N.S. +, Ont. +, Conn. +, Del. +, D.C. +, Ky. +, Maine +, Md. +, Mass. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Vt. +, Va. +  and W.Va. +
not +  and aggregated +
0–1500 m +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
slightly smaller +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 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 />) +
Dry flats and slopes in lawns, pastures, roadsides, cherty slopes, dry meadows, edges of oak and conifer woodlands, often on acidic soil +
stoloniferous +  and short-rhizomatous +
straight +
appressed +  and spreading +
crisped +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 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 />) +
0.25 cm2.5 mm <br />0.0025 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 />) +
racemiform open +  and more or less congested +
crassinucellate +
bipinnate +, odd-pinnate +, subpalmate +, palmate +  and ternate +
opposite +  and alternate +
marcescent +
well-developed +
persistent +
cauline +  and basal +
reduced +
separate +  and slightly overlapping +
obovate +  and narrowly elliptic cuneate or oblanceolate +
linear +  and oblanceolate +
palmate +  and pinnate +
1/4 +  and 1/2 +
inferior +  and superior +
clustered +, biseriate +  and superposed +
5 cm50 mm <br />0.05 m <br /> (9 cm90 mm <br />0.09 m <br />) +
curved +  and straight +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
free +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
usually longer +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
6 cm60 mm <br />0.06 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Flowering late Mar–early Jun. +
adnate +, free +, connate +  and distinct +
palmate +  and ternate +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not arillate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
free +  and distinct +
rooting +  and not branched +
reddish +  and green +
(1-)2-10+ times basal leaves +
initially ascending +  and erect +
1 +  and many +
flagelliform +
palmate +  and pinnate +
deciduous +
distinct +
subapical +
papillate-swollen +, columnar-clavate +  and more or less filiform +
rough-thickened +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Potentilla canadensis var. pumila +, P. canadensis var. villosissima +, P. caroliniana +  and P. pumila +
Potentilla canadensis +
Potentilla sect. Potentilla +
species +
2 +  and 7 +
inconspicuous +
enlarged +
biennial +, annual +  and perennial +
herb +  and matted +