Eremogone ursina - (B.L. Robinson) Ikonnikov
Bear Valley Sandwort
Synonym(s): Arenaria ursina B.L. Robins.
Taxonomic Status: Accepted
Related ITIS Name(s): Arenaria ursina B.L. Robins. (TSN 20272)
Unique Identifier: ELEMENT_GLOBAL.2.141513
Element Code: PDCAR040R0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Pink Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Caryophyllales Caryophyllaceae Eremogone
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Concept Reference
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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.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Arenaria ursina
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 05Mar2012
Global Status Last Changed: 05Mar2012
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G1 - Critically Imperiled
Reasons: Restricted to a unique habitat that occurs in a 240 square km-area in the San Bernardino Mountains of southern California. There are 19 extant EOs. Heavy off-road vehicle and hiking use is occurring and is a significant threat, as the fragile pebble plain habitat is extremely susceptible to long-persisting or irreversible damage from these activities. Some habitat was severely damaged by an act of vandalism involving a construction vehicle. Extensive potential habitat was probably lost with the construction of a dam and reservoir in the late 1800s.
Nation: United States
National Status: N1

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States California (S1)

Other Statuses

U.S. Endangered Species Act (USESA): LT: Listed threatened (14Sep1998)
Comments on USESA: Arenaria ursina was a candidate for federal listing by the USFWS from 1975 to 1995. It was proposed threatened on August 2, 1995 and determined threatened on September 14, 1998.
U.S. Fish & Wildlife Service Lead Region: R8 - California-Nevada

NatureServe Global Conservation Status Factors

Range Extent Comments: Restricted to "Pebble Plains" (dense clay soils, usually with a cobble pavement of saragossa quartzite with little or no litter in the A-horizon) and dry slopes in pinyon and juniper woodlands in the northeastern San Bernardino Mountains of San Bernardino County, California.

Area of Occupancy:  
Area of Occupancy Comments: 7.84 km2

Number of Occurrences: 6 - 80
Number of Occurrences Comments: Thirty-four EOs, but 4 are ranked as C, D, or X and 11 are historic (Bittman, pers. comm. 2012).

Overall Threat Impact: Very high
Overall Threat Impact Comments: As of 2008, 10 occurrences are documented (USFWS 2008). In 1998, 6 of the 8 then known occurrences were threatened (USFWS 1998). Threats include off-road vehicle activity, mining, cattle grazing, urban development, foot traffic and trampling (CNPS 2001, CNDDB 2003, USFWS 2008).

Short-term Trend: Decline of 10-50%

Intrinsic Vulnerability Comments: Habitat does not recover well from disturbance.

Environmental Specificity: Very narrow. Specialist or community with key requirements scarce.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Restricted to "Pebble Plains" (dense clay soils, usually with a cobble pavement of saragossa quartzite with little or no litter in the A-horizon) and dry slopes in pinyon and juniper woodlands in the northeastern San Bernardino Mountains of San Bernardino County, California.

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States CA

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CA San Bernardino (06071)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
18 Santa Ana (18070203)+, Mojave (18090208)+, Southern Mojave (18100100)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A tuft-forming perennial herb. Stems are 1-1.8 dm tall. Leaves are needle-like. Produces small white flowers, borne in open, terminal clusters. Blooms May-August.
Duration: PERENNIAL
Terrestrial Habitat(s): Barrens, Forest - Conifer, Forest/Woodland, Woodland - Conifer
Habitat Comments: Grows on pebble plains and dry slopes in pinyon and juniper woodland. Pebble plains: dense clay soils, usually covered with a cobble pavement of quartzite. These are sparsely vegetated; they occur as openings in the surrounding forest at 1800-2300 m elevation. They support several endemic plant species and disjunct occurrences of plants that are more common elsewhere. Occurs with Eriogonum kennedyi ssp. austromontanum. Eremogone ursina tolerates more shaded sites than other pebble plains associated species.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 18Jun1987
NatureServe Conservation Status Factors Author: Bittman, R.L., rev. Maybury (1997), rev. L. Oliver (2003), rev. A. Treher & R. Bittman (CA botanist) (2012)

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Flora of North America Editorial Committee. 2005. Flora of North America North of Mexico. Vol. 5. Magnoliophyta: Caryophyllidae: Caryophyllales, Polygonales, and Plumbaginales. Oxford Univ. Press, New York. vii + 656 pp.

  • Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.

  • 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.

  • 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.

  • U.S. Fish and Wildlife Service (USFWS). 1998. Final rule to determined endangered or threatened status for six plants in the moutains of southern California. Federal Register 63: 49006-49022. 14 September 1998.

  • U.S. Fish and Wildlife Service (USFWS). 2008. Bear Valley Sandwort (Arenaria ursina) 5-Year Review: Summary and Evaluation. USFWS Carlsbad Fish and Wildlife Office: Carlsbad, California. 15 pp.

  • U.S. Fish and Wildlife Service. 1995. Proposed endangered or threatened status for seven plants from the mountains of southern California. Federal Register 60(148): 39337-39347.

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