Arabis tiehmii - Rollins
Tiehm's Rockcress
Synonym(s): Boechera tiehmii (Rollins) Al-Shehbaz
Taxonomic Status: Accepted
Related ITIS Name(s): Arabis tiehmii Rollins (TSN 184475)
Unique Identifier: ELEMENT_GLOBAL.2.127958
Element Code: PDBRA06280
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mustard Family
Image 12133

© James D. Morefield

 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Capparales Brassicaceae Arabis
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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: Arabis tiehmii
Conservation Status
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NatureServe Status

Global Status: G3
Global Status Last Reviewed: 18Mar2016
Global Status Last Changed: 18Mar2016
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G3 - Vulnerable
Reasons: Known from 11 occurrences in remote high-elevation parts of the Sierra Nevada, many in Wilderness areas. Known areas separated by about 100 miles, with unsurveyed habitat in between. Over 15,000 plants are known, but total acreage covered may only be just over 100 acres. Threats are minimal including trail use and perhaps roadwork near the highway roadcut population. Most populations are unthreatened in high alpine habitats.
Nation: United States
National Status: N3

U.S. & Canada State/Province Status
United States California (S3), Nevada (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Known from Mt. Rose in Washoe County, Nevada and Tioga Pass, Mt. Dana, and Dunderberg Peak in Mono County, California. Likely between the known areas (J. Morefield, 1999).

Area of Occupancy: 6-25 4-km2 grid cells
Area of Occupancy Comments:  

Number of Occurrences: 6 - 20
Number of Occurrences Comments: Nine occurrences in California and 2 in Nevada. All but one California site is historic but is believed due to the lack of threats and remoteness of sites, that sites are extant.

Population Size Comments: About 2100 individuals estimated in the two Nevada populations. The California populations have approximately 11,350 plants (2005).

Number of Occurrences with Good Viability/Integrity: Unknown

Overall Threat Impact: Low
Overall Threat Impact Comments: Sites in California may be impacted by trail use as one population is bisected by a trail and another near a trail (CNDDB 2003). A third site is located near a highway roadcut. Overall sites in California aren't considered that endangered (CNPS 2001). In Nevada, this species is not very threatened due to it's in accessible habitat. There may be occasional off-trail foot traffic near the sites in Nevada, however, the species grows on steep slopes not very close to trails (Morefield 2001).

Short-term Trend: Relatively Stable (<=10% change)
Short-term Trend Comments: The short term trend has probably been stable.

Long-term Trend: Decline of <30% to increase of 25%
Long-term Trend Comments: Long term trend is probably stable and if there has been a change, it is probably less than 25%.

Intrinsic Vulnerability Comments: It is likely that this taxon is biologically vulnerable in some respects, but its remote alpine habitat helps protect it.

Environmental Specificity: Narrow. Specialist or community with key requirements common.
Environmental Specificity Comments: Only known from granitic alpine and boulder rock field areas at very high elevations.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Known from Mt. Rose in Washoe County, Nevada and Tioga Pass, Mt. Dana, and Dunderberg Peak in Mono County, California. Likely between the known areas (J. Morefield, 1999).

U.S. States and Canadian Provinces
Color legend for Distribution Map

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

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CA Mono (06051)
NV Washoe (32031)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
16 Truckee (16050102)+, East Walker (16050301)+
18 Mono Lake (18090101)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Terrestrial Habitat(s): Bare rock/talus/scree
Habitat Comments: Subalpine rock outcrops.
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: 23Aug2016
NatureServe Conservation Status Factors Author: Morefield, J. (1999). L. Oliver rev. (2003), R. Bittman (2005), rev. Bittman (2016)

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
  • Al-Shehbaz, I. A. 2003. Transfer of most North American Species of Arabis to Boechera (Brassicaceae). Novon 13: 381-391.

  • California Department of Fish and Game. 1998. Natural Diversity Database (RareFind 2), Version 2.1.0, August 31, 1998.

  • California Department of Fish and Game. 2000. Natural Diversity Database (RareFind 2), Version 2.1.2, January 25, 2000. Downloaded in 2003.

  • California Native Plant Society (CNPS). 2001. Inventory of Rare and Endangered Plants of California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening Editor. California Native Plant Society. Sacramento, CA. x + 388pp.

  • 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.

  • Morefield, J.D. 1994. Status report for Arabis tiehmii Rollins (1983). Nevada Natural Heritage Program, Carson City, prepared for the U.S. Fish and Wildlife Service, Reno.

  • Morefield, J.D., editor. 2001. Nevada rare plant atlas [with rare plant fact sheets]. Available as a pdf file at: http://heritage.nv.gov/atlas/atlas.html. Compiled by the Nevada Natural Heritage Program, Carson City, for the U.S. Fish and Wildlife Service, Reno, Nevada.

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