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Home/Species/ Narrowleaf Willow

Salix interior

Rowlee

Narrowleaf Willow

G5Secure Found in 3 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
Least concernIUCN
LowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.884420
Element CodePDSAL02510
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
Synonyms
Salix exigua ssp. interior(Rowlee) CronquistSalix exigua var. sericans(Nees) Dorn
Other Common Names
sandbar willow (EN) Sandbar Willow (EN) Saule de l'intérieur (FR)
Concept Reference
Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
Conservation Status
Rank Method Rank calculation - Excel v3.2x
Review Date2024-09-03
Change Date2012-12-10
Edition Date2024-09-03
Edition AuthorsNordman, C. (2024).
Threat ImpactLow
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank Reasons
Narrowleaf Willow (Salix interior) occurs in north America, in Canada and the United States. It occurs from Alaska, across Canada from Yukon, and Northwest Territories to Québec and New Brunswick and south in the United States to Louisiana, Mississippi and Texas. There are estimated to be more than 3000 occurrences, including many occurrences with good or excellent viability. Threats include the loss of habitat due to conversion of natural wetlands for development or agriculture, water management and impoundment with dams, and invasive exotic plants.
Range Extent Comments
Narrowleaf Willow (Salix interior) occurs in north America, in Canada and the United States. It occurs from Alaska, across Canada from Yukon, and Northwest Territories to Québec and New Brunswick and south in the United States to Louisiana, Mississippi and Texas, but not Mexico. Range extent was estimated to be about 14 million square kilometers, using herbarium specimens and photo-based observations documented between 1993 and 2024 (FNA 2010, GBIF 2024, iNaturalist 2024, POWO 2024, SEINet 2024, Villaseñor 2016, Weakley and Southeastern Flora Team 2024).
Occurrences Comments
By applying a 1 km separation distance to herbarium records and photo-based observations documented between 1993 and 2024, there are estimated to be more than 3000 occurrences of Narrowleaf Willow (Salix interior) rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024).
Threat Impact Comments
Threats to Narrowleaf Willow (Salix interior) include the loss of habitat due to conversion of natural wetlands for development or agriculture, water management and impoundment with dams, and invasive exotic plants.
Ecology & Habitat

Habitat

Narrowleaf Willow occurs on sandy to silty floodplains, sandbars, riverbanks, creekbanks, flood scours, margins of lakes, ponds, and prairie sloughs, in dry prairie sand hills, marshes, and disturbed areas, at elevations of 10 to 1800 meters (FNA 2010, Weakley and Southeastern Flora Team 2024).

Reproduction

Flowers from early April to early July (FNA 2010).
Terrestrial Habitats
SavannaGrassland/herbaceous
Palustrine Habitats
HERBACEOUS WETLANDSCRUB-SHRUB WETLANDFORESTED WETLANDRiparian
Other Nations (2)
CanadaN5
ProvinceRankNative
SaskatchewanS4Yes
New BrunswickS3Yes
OntarioS5Yes
Yukon TerritoryS4Yes
AlbertaS5Yes
Northwest TerritoriesSNRYes
ManitobaS5Yes
British ColumbiaS5Yes
QuebecS4Yes
United StatesN5
ProvinceRankNative
MassachusettsS2Yes
MichiganSNRYes
New YorkS5Yes
New JerseyS3Yes
LouisianaSNRYes
South DakotaSNRYes
VermontS3Yes
MarylandS1Yes
IndianaS5Yes
NebraskaSNRYes
ConnecticutSNRYes
ColoradoS4Yes
PennsylvaniaSNRYes
North DakotaSNRYes
AlaskaS4Yes
KentuckyS4Yes
MontanaS5Yes
VirginiaS1Yes
District of ColumbiaSNRYes
IllinoisSNRYes
West VirginiaSNRYes
OhioSNRYes
MississippiSNRYes
KansasS5Yes
TennesseeSNRYes
ArkansasSNRYes
MaineS1Yes
DelawareSHYes
MissouriSNRYes
IowaSNRYes
MinnesotaSNRYes
OklahomaSNRYes
WyomingS3Yes
WisconsinSNRYes
New HampshireS1Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentSmall (1-10%)Serious or 31-70% pop. declineHigh (continuing)
1.1 - Housing & urban areasSmall (1-10%)Serious or 31-70% pop. declineHigh (continuing)
2 - Agriculture & aquacultureSmall (1-10%)Serious or 31-70% pop. declineLow (long-term)
2.1 - Annual & perennial non-timber cropsSmall (1-10%)Serious or 31-70% pop. declineLow (long-term)
7 - Natural system modificationsSmall (1-10%)Serious or 31-70% pop. declineHigh (continuing)
7.2 - Dams & water management/useSmall (1-10%)Serious or 31-70% pop. declineHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)

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Plant Characteristics
DurationDECIDUOUS, SPRING-FLOWERING
Economic Value (Genus)Yes
Roadless Areas (3)
Montana (2)
AreaForestAcres
Big Snowy Mountains WsaLewis and Clark National Forest88,003
HoodooLolo National Forest105,162
Wyoming (1)
AreaForestAcres
Teton Corridor TrailheadsBridger-Teton National Forest286
References (9)
  1. 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.
  2. Global Biodiversity Information Facility (GBIF). 2024. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
  3. iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
  4. Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
  5. Plants of the World Online (POWO). 2024. Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Online. Available: https://powo.science.kew.org/ (accessed 2024).
  6. Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).
  7. USDA, Natural Resources Conservation Service, PLANTS Database [USDA PLANTS]. http://plants.usda.gov/. Accessed 2015.
  8. Villaseñor, J.L. 2016. Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559-902.
  9. Weakley, A.S., and Southeastern Flora Team. 2024. Flora of the southeastern United States. Edition of March 4, 2024. University of North Carolina Herbarium (NCU), North Carolina Botanical Garden, University of North Carolina, Chapel Hill. 2203 pp.