Home/Species/ Western Necklacepod

Sophora leachiana

M.E. Peck

Western Necklacepod

G2Imperiled Found in 1 roadless area NatureServe Explorer →

G2ImperiledGlobal Rank

HighThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.149192

Element CodePDFAB3N050

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderFabales

FamilyFabaceae

GenusSophora

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 MethodLegacy Rank calculation - Excel v3.1x

Review Date2018-06-19

Change Date1991-08-19

Edition Date2018-06-07

Edition AuthorsMaybury, K. (reviewed by J. Kagan), rev. A. Olivero (2003), rev. Treher (2018)

Threat ImpactHigh

Range Extent250-1000 square km (about 100-400 square miles)

Number of Occurrences21 - 80

Rank Reasons

Sophora leachiana is endemic to Josephine County, Oregon. There are approximately 38 extant sites. Although this species is a vigorous vegetative colonizer of disturbed sites, it produces very few viable seeds, and so is unlikely to spread beyond the small area it now occupies. The vegetatively reproducing colonies are particularly vulnerable to herbicides and to physical disturbance during logging or construction activities.

Range Extent Comments

Sophora leachiana is endemic to Josephine County, Oregon.

Occurrences Comments

There are approximately 38 occurrences observed, ten of which have poor viability. Plants were not located during the last survey for three occurrences but there is some possibility that they could still be found. An additional four occurrences are historic (not seen for 20 or more years).

Threat Impact Comments

This species is threatened by disturbance due to logging, herbicide spraying, mining, fire suppression, and road construction/maintenance activities. Logging activities can create openings which enhances the species habitat but that is reliant upon the activity not destroying the plants of Sophora leachiana (S. Vrilakas, pers. comm., 2018).

Ecology & Habitat

Habitat

Restricted to open, disturbed sites (often found in clear cuts) within mixed evergreen-oak woodlands. Usually found at lower elevations, on south or west facing slopes near creeks or other perennial drainages. Often on serpentine substrates.

Terrestrial Habitats

Forest/WoodlandForest - MixedWoodland - MixedBarrens

Palustrine Habitats

HERBACEOUS WETLANDFORESTED WETLANDRiparian

Other Nations (1)

United StatesN2

Province	Rank	Native
Oregon	S2	Yes

Threat Assessments

Threat	Scope	Severity	Timing
4 - Transportation & service corridors	Unknown	Unknown	High (continuing)
4.1 - Roads & railroads	Unknown	Unknown	High (continuing)
5 - Biological resource use	Pervasive - large	Unknown	High (continuing)
5.3 - Logging & wood harvesting	Pervasive - large	Unknown	High (continuing)
8 - Invasive & other problematic species, genes & diseases	Unknown	Unknown	High (continuing)
9 - Pollution	Unknown	Unknown	High (continuing)
9.3 - Agricultural & forestry effluents	Unknown	Unknown	High (continuing)
9.3.3 - Herbicides and pesticides	Unknown	Unknown	High (continuing)

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (1)

Oregon (1)

Area	Forest	Acres
North Kalmiopsis	Siskiyou National Forests	91,560

References (5)

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.
Meinke, R.J. 1982. Threatened and Endangered Vascular Plants of Oregon: An Illustrated Guide. U.S. Fish and Wildlife Service, Region 1, Portland, Oregon. 326 pp.
Peck, M.E. 1961. A manual of the higher plants of Oregon. 2nd edition. Binsford & Mort, Portland, Oregon. 936 pp.
USDA, Natural Resources Conservation Service, PLANTS Database [USDA PLANTS]. http://plants.usda.gov/. Accessed 2015.
Vrilakas, Sue. Personal Communication. Data manager and botanist. Oregon Biodiversity Information Center, Institute for Natural Resources, Portland State University, Portland, Oregon.

Sophora leachiana

Habitat

—