Flora of North America species comparison

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Ivesia shockleyi var. shockleyi

Ivesia shockleyi var. ostleri
Photo is of parent taxon

Shockley's ivesia, sky mousetail
Photo is of parent taxon

Ostler's mousetail, Ostler's or Wah Wah ivesia
Stems

0.2–0.7(–1.1) dm.

(0.2–)0.5–1.5 dm.
Basal leaves

(1–)2–8(–10) cm;

lateral leaflets (3–)5–10 per side, lobes 2–5(–7), oblanceolate to obovate.

(2–)4–12(–14) cm;

leaflets 7–15(–18) per side, lobes (4–)6–10(–12), oblanceolate to obovate or elliptic.
Cauline leaves

0.3–1 cm, blade vestigial, leaflets usually 0.

0.5–2.5 cm, blade reduced pinnate, lateral leaflets 1–3 per side.
Inflorescences

2–10-flowered, 0.5–3 cm diam.

5–20-flowered, (1–)3–4(–6) cm diam. 2n = 28.

Ivesia shockleyi var. shockleyi

Ivesia shockleyi var. ostleri
Phenology Flowering spring–early summer. Flowering spring–early summer.
Habitat Gravelly to rocky slopes and ridges, mainly in high-elevation sagebrush communities, subalpine or alpine conifer woodlands, alpine tundra communities Crevices of quartzite outcrops, in pinyon-juniper and ponderosa pine woodlands
Elevation 1700–4000 m (5600–13100 ft) 1900–2500 m (6200–8200 ft)
Distribution
from FNA
CA; NV; OR
[BONAP county map]
from FNA
UT
[BONAP county map]
Discussion

Of conservation concern.

Variety shockleyi occurs mainly on rocky slopes and talus near and above timberline from the crest of the northern and central Sierra Nevada in California and adjacent Nevada, to Lake and Malheur counties, Oregon, and on scattered sky islands as far as the Toquima Range (Nye County) and Jarbidge Mountains (Elko County) of Nevada. These isolated populations have developed variation that merits further analysis: plants from the northern Intermountain Region tend to have flowers and leaflets larger than those in the Sierra Nevada; central Nevada populations approach var. ostleri in leaflet number and inflorescence size. The Malheur County plants are unusual in occurring on canyon rimrock (West Little Owyhee River) 1000 m lower than any other known population, near I. baileyi var. beneolens on adjacent canyon walls.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Of conservation concern.

Variety ostleri is known from the Needle Range and Wah Wah Mountains of Beaver County, Utah. A report from the Snake Range, White Pine County, Nevada (G. Clifton, unpubl.) remains to be verified.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 9, p. 228. FNA vol. 9, p. 228.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Setosae > Ivesia shockleyi Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Setosae > Ivesia shockleyi
Sibling taxa
I. shockleyi var. ostleri
I. shockleyi var. shockleyi
Name authority unknown Ertter: Syst. Bot. 14: 237, fig. 3. (1989)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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