Ivesia gordonii var. wasatchensis

N. H. Holmgren ex Ertter & Reveal

Novon 17: 323. 2007.

Common names: Wasatch ivesia
Endemic
Treatment appears in FNA Volume 9. Treatment on page 235. Mentioned on page 230, 234.

Stems usually greenish, ± erect, (1–) 1.5–4 dm, sometimes sparsely villous, minutely glandular, often glandular-pubescent. Basal leaves 9–20 (–25) × 1–2 (–3) cm; leaflets 7–13 (–18) mm, glabrous or sparsely hirsute or villous marginally. Inflorescences 10–50 (–70) -flowered, usually branched, 2–8 (–11) cm diam., glomerules (1–) 2–6 (–10), ± capitate. Flowers 9–12 mm diam.; epicalyx bractlets 2–4 mm; hypanthium 2.5–4 (–4.5) × 2.5–4 (–5) mm; sepals 3–5 (–6) mm, acute to obtuse; anthers sometimes red-margined.


Phenology: Flowering summer.
Habitat: Talus slopes and outcrops, in montane and subalpine conifer woodlands
Elevation: 2000–3200 m

Discussion

Variety wasatchensis is more broadly defined here than the “wasatchensis” of N. H. Holmgren (1997b). The variety is most distinct in the greater Wasatch Range and in the western Uinta Mountains, where plants are generally larger than other varieties with larger leaves, more elongated leaflets, and multi-headed inflorescences. Less distinctive populations extend along the Idaho-Wyoming border to southwestern Montana. Variety wasatchensis merges with var. gordonii at low elevations in Montana and Wyoming, and with the high-elevation phase assigned here to var. gordonii in Utah.

Selected References

None.

Lower Taxa

None.

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

not carunculate +
grayish brown +  and mottled brown +
longer than wide +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Barbara Ertter +  and James L. Reveal +
N. H. Holmgren ex Ertter & Reveal +
compound +  and simple +
opposite +  and alternate +
20 cm200 mm <br />0.2 m <br /> (25 cm250 mm <br />0.25 m <br />) +
20 cm200 mm <br />0.2 m <br /> (25 cm250 mm <br />0.25 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
9 cm90 mm <br />0.09 m <br /> (20 cm200 mm <br />0.2 m <br />) +
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Horkelia gordonii +
20 cm200 mm <br />0.2 m <br /> (25 cm250 mm <br />0.25 m <br />) +
narrowly oblong +  and filiform planar +
reduced +
0.5 cm5 mm <br />0.005 m <br /> (20 cm200 mm <br />0.2 m <br />) +
reduced +
elongate +
free +  and distinct +
branched +  and simple +
Wasatch ivesia +
Idaho +, Mont. +, Utah +  and Wyo. +
not +  and aggregated +
2000–3200 m +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
deciduous +
obliquely ovoid +  and reniform +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
loose +  and capitate +
Talus slopes and outcrops, in montane and subalpine conifer woodlands +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 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 /> (0.3 cm3 mm <br />0.003 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
branched +  and 10-50(-70)-flowered +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
crassinucellate +
opposite +  and alternate +
winter-marcescent +
deciduous +  and persistent +
1.3 cm13 mm <br />0.013 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
, +  and distinct +
not +  and distinguishable +
villous +, hirsute +  and glabrous +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
narrowly oblanceolate +  and obovate +
verticillate +
toothed +, unlobed +  and lobed +
inferior +  and superior +
clustered +, biseriate +  and superposed +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0 (?) +  and 4 (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
free +  and distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
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 +
acute +  and obtuse +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
free +  and distinct +
branched +  and simple +
2 +  and 20 +
palmate +  and pinnate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
deciduous +
distinct +
subterminal +
filiform +
rough-thickened +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Potentilla gordonii +
not fleshy +
Ivesia gordonii var. wasatchensis +
Ivesia gordonii +
variety +
inconspicuous +
stipelike +, elongate +, less flat +  and conic or turbinate +
enlarged +
glabrate +  and sparsely densely glandular-puberulent +