Home/Species/ Tiehm's Rush

Juncus tiehmii

Ertter

Tiehm's Rush

G4Apparently Secure Found in 1 roadless area NatureServe Explorer →

G4Apparently SecureGlobal Rank

Medium - lowThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.136946

Element CodePMJUN013B0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

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

KingdomPlantae

PhylumAnthophyta

ClassMonocotyledoneae

OrderJuncales

FamilyJuncaceae

GenusJuncus

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 Date2023-05-05

Change Date1997-09-04

Edition Date2023-05-05

Edition AuthorsNorrdman, C. (2023).

Threat ImpactMedium - low

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

Number of Occurrences81 - 300

Rank Reasons

According to Barbara Ertter, this species is not rare in California. It primarily occurs in the Sierra Nevada, with a full range from northern Baja California to northern Nevada and Idaho.

Range Extent Comments

Tiehm's Rush occurs in the western United States, and northwestern Mexico. It's range is centered in mountainous areas of California, extending from northern Baja California (in Mexico) to Oregon, central Washington, Idaho, and northern Nevada. The range extent is estimated to be 600,000 square kilometers (Brooks and Clemants 2020, CCH2 Portal 2023, GBIF 2023, Zika 2015).

Occurrences Comments

There are about 130 known occurrences of Tiehm's Rush (CCH2 Portal 2023, GBIF 2023).

Threat Impact Comments

Threats to the wetlands where Tiehm's Rush occurs include habitat loss and fragmentation from development, hydrologic impacts from dams and water management, invasive exotic species, and extreme drought, such as is associated with climate change.

Ecology & Habitat

Habitat

This species is found in moist, bare, granitic sand along streams, seepage areas near outcrops, and in meadows depressions (which may be wet in the springtime) at elevations ranging from 300 to 3100 meters. It occurs in the Basin and Range, Cascade Range, Sierra Nevada, Southern Coast Range, San Gabriel Mountains, San Bernardino Mountains, San Jacinto Mountains, and the Peninsular Ranges in southern California (Brooks and Clemants 2020, Lathrop and Thorne 1983, Zika 2015).

Ecology

An annual plant associated with sandy riparian seepage wetlands, and depressions including vernal pools.

Terrestrial Habitats

Grassland/herbaceous

Palustrine Habitats

Riparian

Other Nations (1)

United StatesN4

Province	Rank	Native
Idaho	S1	Yes
California	SNR	Yes
Oregon	S1	Yes
Nevada	S2	Yes
Washington	S1	Yes

Threat Assessments

Threat	Scope	Severity	Timing
1 - Residential & commercial development	Small (1-10%)	Serious or 31-70% pop. decline	High (continuing)
7 - Natural system modifications	Large - restricted	Moderate or 11-30% pop. decline	High (continuing)
7.2 - Dams & water management/use	Large - restricted	Moderate or 11-30% pop. decline	High (continuing)
8 - Invasive & other problematic species, genes & diseases	Restricted (11-30%)	Moderate or 11-30% pop. decline	High (continuing)
8.1 - Invasive non-native/alien species/diseases	Restricted (11-30%)	Moderate or 11-30% pop. decline	High (continuing)
11 - Climate change & severe weather	Large (31-70%)	Slight or 1-10% pop. decline	Low (long-term)
11.2 - Droughts	Large (31-70%)	Slight or 1-10% pop. decline	Low (long-term)

Plant Characteristics

DurationANNUAL

Economic Value (Genus)No

Roadless Areas (1)

California (1)

Area	Forest	Acres
San Mateo Canyon	Cleveland National Forest	65

References (6)

Brooks, R.E., and S.E. Clemants. 2020. Flora of North America. <i>Juncus tiehmii</i>. Accessed: September 19, 2022. http://floranorthamerica.org/Juncus_tiehmii
CCH2 Portal. 2023. Consortium of California Herbaria. Online. Available: https//:www.cch2.org/portal/index.php (accessed 2023).
Global Biodiversity Information Facility (GBIF). 2023. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.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.
Lathrop, E.W. and R.F. Thorne. 1983. A Flora of the Vernal Pools on the Santa Rosa Plateau, Riverside County, California. Aliso: A Journal of Systematic and Floristic Botany 10(3): 449-469. Online. Available: https://scholarship.claremont.edu/aliso/vol10/iss3/8 (Accessed 2023).
Zika, P.F. 2015. <i>Juncus</i>, in Jepson Flora Project (Editors) Jepson eFlora, Revision 3. Online. Available: https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=9148 (Accessed 2023).

Juncus tiehmii

Habitat

Ecology

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