Potentilla bicrenata

Rydberg

Bull. Torrey Bot. Club 23: 431. 1896.

EndemicIllustrated
Synonyms: Potentilla concinna var. bicrenata (Rydberg) S. L. Welsh & B. C. Johnston
Treatment appears in FNA Volume 9. Treatment on page 179. Mentioned on page 177, 178, 180, 182.

Stems 0.2–0.8 (–1.5) dm, lengths 1/2–1 1/2 times basal leaves. Basal leaves palmate, (2–) 4–10 (–15) cm; petiole (1–) 2–6 (–10) cm, straight hairs abundant, ± appressed to ascending, 1.5–2 mm, stiff, cottony hairs usually absent, glands sparse, often obscured; leaflets 5–7 (–9), on tip or at least less than distal 1/10 of leaf axis, slightly overlapping, proximal pair separated from others by 0 (–1) mm of leaf axis, central leaflets ± oblanceolate, 1–4 (–5.5) × 0.5–1 cm, petiolules 0 (–3) mm, less than distal 1/5 (–1/3) of margins incised ± 1/2 to midvein, teeth 0–1 (–3) per side, separate, 0.5–2 mm, surfaces strongly to ± dissimilar, abaxial grayish white to white, straight hairs abundant, ± appressed, 1–1.5 (–2) mm, weak to stiff (especially on veins), cottony hairs common to dense, glands absent or obscured, adaxial green to grayish green, straight hairs ± abundant, appressed, 0.5–1 mm, stiff, cottony hairs absent, rarely sparse, glands absent or obscured. Inflorescences 2–5 (–8) -flowered. Pedicels 1–3 (–4.5) cm. Flowers: epicalyx bractlets ± lanceolate, 2–4 × 1 mm; hypanthium 3–4 mm diam.; sepals (2.5–) 3–5.5 mm, apex ± acute; petals 3.5–7 × 2.5–5.5 mm; filaments 1–2 mm, anthers 0.5–1 mm; carpels 10–20, styles 2 mm. Achenes 2 mm, smooth to rugose.


Phenology: Flowering early summer.
Habitat: Outcrops, dry flats, pine duff, in pine and/or juniper woodlands, sagebrush scrub
Elevation: 1900–3300 m

Distribution

V9 262-distribution-map.jpg

Ariz., Colo., N.Mex., Utah, Wyo.

Discussion

The entire to tridentate leaflets of Potentilla bicrenata generally serve to distinguish this species from P. concinna. Unequivocal P. bicrenata is most common in Utah and the southern Rocky Mountains from New Mexico to central Colorado; in Arizona, it is documented only from the Kaibab Plateau. Wyoming populations tend to be transitional to P. concinna var. concinna in leaflet toothing and/or petal size. Some collections from as far north as Waterton Lakes National Park, Alberta, vary in the direction of P. bicrenata but are retained here in P. concinna.

Selected References

None.

Lower Taxa

None.

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

... more about "Potentilla bicrenata"
green +  and white +
grayish white +  and white +
green +  and white +
smooth +  and rugose +
green +  and grayish green +
green +  and grayish +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Barbara Ertter +
Rydberg +
opposite +  and alternate +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Concinnae +
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 /> (5.5 cm55 mm <br />0.055 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Ariz. +, Colo. +, N.Mex. +, Utah +  and Wyo. +
not +  and aggregated +
1900–3300 m +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
0.1 cm1 mm <br />0.001 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 />) +
Outcrops, dry flats, pine duff, in pine and/or juniper woodlands, sagebrush scrub +
stoloniferous +  and short-rhizomatous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
straight +
stiff +  and weak +
less appressed +  and ascending +
abundant +  and common +
crisped +
0.05 cm0.5 mm <br />5.0e-4 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 />) +
0.3 cm3 mm <br />0.003 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 +
cuneate +  and obovate +
linear +  and oblanceolate +
palmate +  and pinnate +
entire +  and cleft +
1/4 +  and 3/4 +
inferior +  and superior +
clustered +, biseriate +  and superposed +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
free +  and distinct +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1/2 +, 1/5 +  and 1/3 +
0 cm0 mm <br />0 m <br /> (?) +
Flowering early summer. +
adnate +, free +, connate +  and distinct +
subpinnate +  and pinnate +
12 cm120 mm <br />0.12 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (12 cm120 mm <br />0.12 m <br />) +
usually not much longer +
Bull. Torrey Bot. Club +
not arillate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Endemic +  and Illustrated +
free +  and distinct +
not rooting +
reddish +  and green +
prostrate +  and more or less decumbent +
1/2-1-1/2 times basal leaves +
prostrate +  and erect +
1 +  and many +
not flagelliform +
palmate +  and pinnate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
deciduous +
distinct +
subapical +
in proximal 1/5 +, not papillate-swollen +, filiform +  and filiform-tapered +
rough-thickened +
2 cm20 mm <br />0.02 m <br /> (?) +
Potentilla concinna var. bicrenata +
not fleshy +
Potentilla bicrenata +
Potentilla sect. Concinnae +
species +
0 +  and 1 +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
inconspicuous +
enlarged +
usually rosetted +  and tufted +
biennial +, annual +  and perennial +
herb +  and matted +