Home/Species/ Del Norte Coast Willow

Salix sessilifolia

Nutt.

Del Norte Coast Willow

G4Apparently Secure (G4?) Found in 1 roadless area NatureServe Explorer →

G4Apparently SecureGlobal Rank

Least concernIUCN

MediumThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.141892

Element CodePDSAL022Q0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

IUCNLeast concern

Endemicoccurs (regularly, as a native taxon) in multiple nations

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderSalicales

FamilySalicaceae

GenusSalix

Other Common Names

Northwest Sandbar Willow (EN) northwest sandbar willow (EN) Saule à feuilles sessiles (FR) Sessile-leaf Sandbar Willow (EN) Sessile-leaf Willow (EN) Soft-leaf 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.

Taxonomic Comments

This name was misapplied to material in California (Jepson Flora Project 2018).

Conservation Status

Rank MethodLegacy Rank calculation - Excel v3.1x

Review Date2018-06-01

Change Date2018-06-01

Edition Date2018-06-01

Edition AuthorsGamon, John G., rev. D. Gries (1998), rev. Treher (2018)

Threat ImpactMedium

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

Number of Occurrences21 - 300

Rank Reasons

Salix sessilifolia occurs from southern British Columbia south to the Umpqua Valley in Oregon.The number of occurrences rangewide is unknown. Threats are not well known across most of the species range but in regions where it is rare, like Washington state, the species is threatened by construction of dikes/levees,conversion of habitat, recreation, and invasive species.

Range Extent Comments

Salix sessilifolia occurs from southern British Columbia south to the Umpqua Valley in Oregon. This species was thought to occur in California but it was based on misidentification of plants belonging to Salix melanopsis (Jepson Flora Project 2018).

Occurrences Comments

The number of extant occurrences is unknown. There are less than 10 occurrences in Washington. Rangewide, there are about 72 occurrences based on historic and recent herbarium records in GBIF (2018). While this could underestimate the true number of occurrences, if this species has experienced declines, so there could be less than 72 or less occurrences.

Threat Impact Comments

This species is threatened by invasive species (knotweed, Himalayan Blackberry, and ivy), recreational use at some sites, the construction of dikes/levees, and the conversion of lowland wetland habitat where this species occurs (Camp and Gamon 2011).

Ecology & Habitat

Habitat

This species occurs on the lower edge of riparian forests along larger rivers west of Cascades.

Palustrine Habitats

FORESTED WETLANDRiparian

Other Nations (2)

United StatesN3

Province	Rank	Native
Washington	S2	Yes
Oregon	SNR	Yes

CanadaN4

Province	Rank	Native
British Columbia	S4	Yes

Threat Assessments

Threat	Scope	Severity	Timing
6 - Human intrusions & disturbance	Unknown	Unknown	High (continuing)
6.1 - Recreational activities	Unknown	Unknown	High (continuing)
7 - Natural system modifications	Unknown	Unknown	High (continuing)
8 - Invasive & other problematic species, genes & diseases	Unknown	Unknown	High (continuing)
8.1 - Invasive non-native/alien species/diseases	Unknown	Unknown	High (continuing)

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)Yes

Roadless Areas (1)

Oregon (1)

Area	Forest	Acres
Mt. Hagen	Willamette National Forest	6,406

References (7)

Camp, P., and J.G. Gamon, eds. 2011. Field Guide to the Rare Plants of Washington. Washington Natural Heritage Program and Washington State Department of Natural Resources. University of Washington Press, Seattle. 408 pp.
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). 2018. GBIF data accessed through GeoCAT portal. Online. Available: http://geocat.kew.org/ (Accessed 2018).
Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
Jepson Flora Project (eds.) 2018. Jepson eFlora. Online. Available: http://ucjeps.berkeley.edu/IJM.html (accessed 2018).
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.
Little, E.L., Jr. 1979. Checklist of United States trees (native and naturalized). Agriculture Handbook No. 541. U.S. Forest Service, Washington, D.C. 375 pp.

Salix sessilifolia

Habitat

—