Potentilla concinna var. divisa

Rydberg

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

Endemic
Synonyms: Potentilla divisa (Rydberg) Rydberg
Treatment appears in FNA Volume 9. Treatment on page 179. Mentioned on page 178, 209.

Stems 0.2–1 (–1.5) dm, lengths (1/2–) 1–2 times basal leaves. Basal leaves palmate to subpalmate; leaflets on tip or to distal 1/4 of leaf axis, ± overlapping, proximal pairs sometimes separated from others by 1–3 mm of leaf axis; distal (1/2–) 3/4 to entire length of central leaflets incised 1/2–3/4+ to midvein, teeth 3–5 (–6) per side, 2–6 mm. Inflorescences (1–) 2–6-flowered. Petals 5–8 mm. Achenes 2–2.5 mm.


Phenology: Flowering summer.
Habitat: High prairies, rocky slopes and ridges, gravelly foothills, open pine woodlands, often on limestone
Elevation: 600–3300 m

Distribution

V9 260-distribution-map.jpg

Alta., Man., Sask., Colo., Mont., N.Dak., Ohio, S.Dak., Utah, Wyo.

Discussion

Variety divisa is the primary phase of the species in the northwestern prairies, Black Hills, and Rocky Mountain foothills. Plants differ from the typical variety in having more deeply toothed leaflets on average, as well as somewhat longer stems in relation to leaves, silkier vestiture, and occasional subpalmate leaves (possibly intergrading with Potentilla macounii). Also included in var. divisa are plants with deeply toothed leaflets from comparatively low elevations in northwestern Colorado, northeastern Utah, and Wyoming. These populations, which tend to have sparser, shaggier vestiture, were included by S. L. Welsh et al. (1993) in var. modesta (Rydberg) S. L. Welsh & B. C. Johnston (misapplied), along with some palmate-leaved collections of var. proxima. An anomalous collection from Stark County, Ohio (T. Davis 876, MO), which is exceptionally silky, is presumably introduced.

For the nomenclatural relation between var. divisa and Potentilla nivea var. dissecta S. Watson, see B. Ertter (2008).

Selected References

None.

Lower Taxa

None.

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

green +  and white +
grayish +  and white +
green +  and white +
smooth +  and lightly rugose +
2mm +  and 2.5mm +
green +  and grayish +
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 +
palmate +  and subpalmate +
opposite +  and alternate +
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 +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Alta. +, Man. +, Sask. +, Colo. +, Mont. +, N.Dak. +, Ohio +, S.Dak. +, Utah +  and Wyo. +
not +  and aggregated +
600–3300 m +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
lanceolate +  and narrowly ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 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 />) +
High prairies, rocky slopes and ridges, gravelly foothills, open pine woodlands, often on limestone +
stoloniferous +  and short-rhizomatous +
straight +
weak +  and stiff +
less appressed +  and ascending +
common +, sparse +  and abundant +
crisped +
0.05 cm0.5 mm <br />5.0e-4 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 />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 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 +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
free +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1/4 +  and 3/4 +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering 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 +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +  and broadly ovate or deltate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
free +  and distinct +
not rooting +
reddish +  and green +
prostrate +  and more or less decumbent +
(1/2-)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 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Potentilla divisa +
not fleshy +
Potentilla concinna var. divisa +
Potentilla concinna +
variety +
3 +  and 5 +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
inconspicuous +
enlarged +
usually rosetted +  and tufted +
biennial +, annual +  and perennial +
herb +  and matted +