Potentilla concinna var. proxima

(Rydberg) S. L. Welsh & B. C. Johnston

Great Basin Naturalist 42: 25. 1982.

Conservation concernEndemicIllustrated
Basionym: Potentilla proxima Rydberg in N. L. Britton et al., N. Amer. Fl. 22: 339. 1908
Synonyms: P. beanii Clokey P. diversifolia var. proxima (Rydberg) Soják
Treatment appears in FNA Volume 9. Treatment on page 179. Mentioned on page 170, 178.

Stems (0.2–) 0.6–1.6 dm, lengths 2–3 (–4) times basal leaves. Basal leaves usually palmate to subpalmate, sometimes subpinnate; leaflets on tip or to distal 1/4 of leaf axis, ± overlapping, proximal pairs sometimes doubled often separated from others by 1–5 (–10) mm of leaf axis; distal 1/3–2/3 of central leaflets incised 1/4–1/2 to midvein, teeth 2–4 per side, 1–3 (–5) mm. Inflorescences (1–) 3–12-flowered. Petals (2.5–) 4–6 mm. Achenes 1.5–2 mm.


Phenology: Flowering mid summer.
Habitat: Alpine tundra, windswept ridges, stony meadows
Elevation: 2600–3900 m

Distribution

V9 261-distribution-map.jpg

Ariz., Calif., Colo., Nev., N.Mex., Utah.

Discussion

Of conservation concern.

Variety proxima is the primary phase of Potentilla concinna in the mountains of southwestern Colorado, Nevada, and Utah. Some alpine collections from New Mexico are referable to var. proxima, and isolated populations also occur in the San Francisco Peaks of Arizona (at higher elevations than otherwise sympatric var. concinna) and the White Mountains of California. Specimens from Montana keying here are provisionally placed in P. macounii.

The most distinctive feature of var. proxima is the elongate flowering stems, which are usually over twice as long as the leaves. Leaves tend to be more sparsely cottony and less bicolored than in the typical variety, the central leaflet is more often petiolulate, and flowers are commonly somewhat smaller. Collections from southwestern Utah and adjacent Nevada, including the type of Potentilla proxima, commonly have subpalmate leaves; elsewhere leaves are rarely or scarcely subpalmate.

Selected References

None.

Lower Taxa

None.

"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 +
1.5mm +  and 2mm +
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) S. L. Welsh & B. C. Johnston +
subpinnate +, usually palmate +  and subpalmate +
opposite +  and alternate +
Potentilla proxima +
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 />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
narrowly oblanceolate +  and obovate +
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 />) +
Ariz. +, Calif. +, Colo. +, Nev. +, N.Mex. +  and Utah. +
not +  and aggregated +
2600–3900 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 />) +
Alpine tundra, windswept ridges, stony meadows +
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 />) +
(1-)3-12-flowered +
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 />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 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 />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 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 mid 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 +
Great Basin Naturalist +
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 />) +
Conservation concern +, Endemic +  and Illustrated +
free +  and distinct +
not rooting +
reddish +  and green +
prostrate +  and more or less decumbent +
2-3(-4) 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 />) +
P. beanii +  and P. diversifolia var. proxima +
not fleshy +
Potentilla concinna var. proxima +
Potentilla concinna +
variety +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 +  and 4 +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
inconspicuous +
enlarged +
usually rosetted +  and tufted +
biennial +, annual +  and perennial +
herb +  and matted +