Potentilla grayi

S. Watson

Proc. Amer. Acad. Arts 8: 560. 1873.

Common names: Gray’s cinquefoil
Endemic
Synonyms: Potentilla flabellifolia var. grayi (S. Watson) Jepson
Treatment appears in FNA Volume 9. Treatment on page 191. Mentioned on page 189.

Plants rosetted or ± tufted; caudex branches absent or short-to-elongate, stout to slender. Stems ascending to erect, (0.4–) 1–2 dm, lengths 2–4 times basal leaves. Basal leaves not in ranks, ternate, (1–) 2–5 (–7) cm; stipules: apex acute to rounded; petiole 1–4 cm, hairs absent or long hairs sparse to common, appressed, 0.5–1 mm, stiff, glands absent; leaflets 3, central obovate to flabellate, 1–2.5 × 0.5–2 cm, petiolule (1–) 3–10 mm, margins flat, not lobed, distal 1/2–3/4 ± evenly incised 1/4–1/2 to midvein, teeth (2–) 3 (–4) per side, not secondarily toothed, surfaces similar, green, sometimes ±glaucous, hairs absent or sparse to common, 0.5 mm, glands absent. Inflorescences 1–6-flowered. Pedicels straight, 0.5–2 cm in flower, to 5 cm in fruit. Flowers: epicalyx bractlets elliptic to oval, 2–4.5 × 1–2 mm, margins flat; hypanthium 2.5–4 mm diam.; sepals 3–5.5 mm, apex acute to obtuse; petals yellow, 4–7 × 4–6 mm; filaments 1–3 mm, anthers 0.5–0.9 mm; carpels 10–30, styles filiform, not or slightly papillate-swollen proximally, 1–2.5 mm. Achenes 1.2–1.5 mm.


Phenology: Flowering summer.
Habitat: Moist stream banks, lakeshores, meadows, in conifer woodlands
Elevation: 2000–2800 m

Discussion

Potentilla grayi occurs on the western slope of the Sierra Nevada from El Dorado County to Tulare County, well within the range of P. flabellifolia. Some collections are intermediate between the two. Potentilla grayi can be distinguished by its tendency to have glabrous or strigose leaves, distinctly petiolulate leaflets with simple teeth, paler yellow petals, and a less-branched caudex.

The report of Potentilla grayi in New Mexico (J. D. Garcia 1970) was based on a specimen of P. norvegica (sect. Rivales).

Selected References

None.

Lower Taxa

None.

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

... more about "Potentilla grayi"
pale +  and dark green rarely grayish brownish or reddish +
1.2mm +  and 1.5mm +
green +  and dark green rarely brownish or reddish +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Reidar Elven +, Barbara Ertter +, David F. Murray +  and James L. Reveal +
S. Watson +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Aureae +
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 +
stout +  and slender +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
obovate +  and flabellate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Gray’s cinquefoil +
not +  and aggregated +
2000–2800 m +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
elliptic +  and oval +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
5-merous +, solitary +  and open +
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 />) +
Moist stream banks, lakeshores, meadows, in conifer woodlands +
stoloniferous +  and short-rhizomatous +
straight +
sparse +  and common +
crisped +
0.5 cm5 mm <br />0.005 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
not differentiated +
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 /> (0.4 cm4 mm <br />0.004 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 +
not +  and overlapping +
obtriangular +  and flabellate +
linear +  and oblanceolate +
palmate +  and pinnate +
1/4 +  and 1/2 +
incised +  and not lobed +
inferior +  and superior +
clustered +, biseriate +  and superposed +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 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 /> (1.2 cm12 mm <br />0.012 m <br />) +
free +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
usually longer +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 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 />) +
usually not much longer +
Proc. Amer. Acad. Arts +
not arillate +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
free +  and distinct +
not rooting +
reddish +  and green +
2-4 times basal leaves +
ascending +  and erect +
1 +  and many +
not flagelliform +
palmate +  and pinnate +
deciduous +
distinct +
subapical +
papillate-swollen +  and filiform +
rough-thickened +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Potentilla flabellifolia var. grayi +
not fleshy-thickened +
Potentilla grayi +
Potentilla sect. Aureae +
species +
toothed +
inconspicuous +
enlarged +
matted +  and cushion-forming +
tufted +  and rosetted +
biennial +, annual +  and perennial +