Home/Species/ Idaho Willow

Salix wolfii

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Idaho Willow

G5Secure (G5?) Found in 5 roadless areas NatureServe Explorer →

G5SecureGlobal Rank

UnknownThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.148721

Element CodePDSAL02340

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single nation

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderSalicales

FamilySalicaceae

GenusSalix

Other Common Names

Wolf's Willow (EN) Wolf's willow (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

Rank Method Rank calculation - Biotics v2

Review Date2023-07-21

Change Date1989-02-08

Edition Date2023-07-21

Edition AuthorsTomaino, A. (2023)

Threat ImpactUnknown

Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)

Number of Occurrences> 300

Rank Reasons

Salix wolfii is known from northeast Oregon east to Montana, south to northeast Nevada and western Colorado. There are estimated to be over 300 occurrences. Potential threats include livestock grazing and alterations to hydrology.

Range Extent Comments

Salix wolfii is known from northeast Oregon east to Montana, south to northeast Nevada and western Colorado (Flora of North America Editorial Committee 2010, Welsh 2015). Range extent was estimated using herbarium specimens collected between 1992 and 2023 (GBIF 2023, iNaturalist 2023, SEINet 2023).

Occurrences Comments

By applying a 1 km separation distance to herbarium records and photo-based observations documented between 1992 and 2023, it is estimated that there greater than 300 occurrences rangewide (GBIF 2023, iNaturalist 2023, SEINet 2023).

Threat Impact Comments

Threats mentioned in 1999 for Salix wolfii wet shrubland include overuse by livestock, and changes in the hydrologic regime that result in a lower water table (NatureServe 2023).

Ecology & Habitat

Habitat

Salix wolfii is known from sedge meadows along stream and lake margins, drainageways, stream banks, springs, wet meadows, and bogs (Flora of North America Editorial Committee 2010).

Palustrine Habitats

HERBACEOUS WETLANDBog/fenRiparian

Other Nations (1)

United StatesN5

Province	Rank	Native
Nevada	S2	Yes
Wyoming	S4	Yes
Montana	S4	Yes
Utah	S3	Yes
Colorado	S4	Yes
Oregon	S2	Yes
Idaho	SNR	Yes

Threat Assessments

Threat	Scope	Severity	Timing
2 - Agriculture & aquaculture	—	—	—
2.3 - Livestock farming & ranching	—	—	—
7 - Natural system modifications	—	—	—
7.2 - Dams & water management/use	—	—	—

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)Yes

Roadless Areas (5)

Idaho (4)

Area	Forest	Acres
Boulder - White Clouds	Salmon-Challis National Forest	139,297
Boulder - White Clouds	Sawtooth National Forest	322,653
Pioneer Mountains	Salmon-Challis National Forest	172,460
Pioneer Mountains	Sawtooth National Forest	119,563

Wyoming (1)

Area	Forest	Acres
Beartooth Proposed Wilderness	Shoshone National Forest	16,837

References (7)

Flora of North America Editorial Committee (FNA). 2010. Flora of North America north of Mexico. Vol. 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York. xxii + 797 pp.
Global Biodiversity Information Facility (GBIF). 2023. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2023).
iNaturalist. 2023. Online. Available: https://www.inaturalist.org (accessed 2023).
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.
NatureServe. 2023. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
Southwest Environmental Information Network (SEINet). 2023. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2023).
Welsh, S.L., N.D. Atwood, S. Goodrich, and L.C. Higgins. (Eds). 2015. A Utah flora, fifth edition, revised 2015. Monte L. Bean Life Science Museum, Provo, Utah. 987 pp.

Salix wolfii

Habitat

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