Home/Species/ Shockley's Ivesia

Ivesia shockleyi

S. Wats.

Shockley's Ivesia

G3Vulnerable (G3G4) Found in 18 roadless areas NatureServe Explorer →

G3VulnerableGlobal Rank

Identity

Unique IDELEMENT_GLOBAL.2.135337

Element CodePDROS0X0L0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single nation

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderRosales

FamilyRosaceae

GenusIvesia

Other Common Names

sky mousetail (EN) Sky Mousetail (EN)

Concept Reference

Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Conservation Status

Review Date1999-12-29

Change Date1998-02-01

Edition Date1999-12-29

Edition AuthorsVrilakas, Sue

Range Extent20,000-2,500,000 square km (about 8000-1,000,000 square miles)

Number of Occurrences21 - 80

Rank Reasons

Ivesia shockleyi is a fairly wide ranging species and grows in habitat that is not normally affected by other activities. Estimates for total number of occurrences is over 21, and for total abundance over 3000. Of the four states in which this species occurs, only Oregon and Utah actively tracks information and for only one of the varieties (Ivesia shockleyi var. shockelyi and Ivesia shockleyi var. osterli, respectively).

Range Extent Comments

Ivesia shockleyi var. ostleri is restricted to the Wah Wah and Needle Ranges, Beaver County, Utah. Ivesia shockleyi var. shockleyi can be found in Lake County, Oregon, the Sierra Nevadas and Great Basin portions of California (Placer to Inyo Counties), and central and northeastern Nevada (Inyo and Elko Counties).

Occurrences Comments

There are two populations in Oregon and at least one in Utah. Neither California Natural Diversity Data Base (1999) nor Nevada Natural Heritage Program (internet home page) have this species on their rare plant list. The CalFlora Project (1999) reports 44 observations from California, which included data from herbaria collection labels, species lists, U.S. Forest Service ecology plots and literature surveys. Nineteen of the observations are dated 1960 and later. The estimate of 21-100 occurrences may be conservative with the truer number being over 100.

Threat Impact Comments

Threats to its habitat--open rocky areas at fairly high elevations--are not perceived to be imminent or extensive.

Ecology & Habitat

Habitat

Ivesia shockleyi grows on open, exposed rocky ridges and outcrops at elevations ranging from 8100-13200 feet (2400-4000 meters) for var. shockleyi, and 6300-8000 feet (1950-2440 meters) for var. ostleri. The latter variety is more limited (Utah endemic) than the typical variety and can be found in plant associations of pinyon pine-juniper woodlands and ponderosa pine forests (Utah Natural Heritage Program internet home page).

Terrestrial Habitats

Forest/WoodlandForest - ConiferWoodland - ConiferAlpine

Other Nations (1)

United StatesNNR

Province	Rank	Native
Oregon	S1	Yes
California	SNR	Yes
Nevada	S2	Yes
Utah	SNR	Yes

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (18)

California (14)

Area	Forest	Acres
Birch Creek	Inyo National Forest	28,816
Black Canyon	Inyo National Forest	32,421
Boundary Peak (CA)	Inyo National Forest	210,884
Coyote North	Inyo National Forest	11,932
Coyote Southeast	Inyo National Forest	53,159
Hoover - Virginia Lks	Humboldt-Toiyabe National Forest	5,050
Horse Mdw.	Inyo National Forest	5,687
Log Cabin Saddlebag	Inyo National Forest	15,165
Nevahbe Ridge	Inyo National Forest	302
North Lake	Inyo National Forest	2,406
Rock Creek West	Inyo National Forest	3,626
Sherwin	Inyo National Forest	3,140
Table Mtn.	Inyo National Forest	4,215
Tioga Lake	Inyo National Forest	829

Nevada (4)

Area	Forest	Acres
Boundary Peak (NV)	Inyo National Forest	21,851
Ruby - Lamoille Cyn	Humboldt-Toiyabe National Forest	32,771
Ruby - Marsh	Humboldt-Toiyabe National Forest	10,164
Ruby - Segunda	Humboldt-Toiyabe National Forest	12,532

References (4)

CalFlora Project. 1999. A botanical resource for California on the internet. www.calflora.org
California Natural Diversity Data Base. 1999. Special Plants List, June 1999. California Department of Fish and Game, Sacramento, CA. 119 pp.
Flora of North America Editorial Committee (FNA). 2014b. Flora of North America north of Mexico. Vol. 9. Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York. xxiv + 713 pp.
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.