Prunus eremophila - Prigge
Mojave Desert Plum
Other Common Names: Mojave Desert plum
Taxonomic Status: Provisionally accepted
Unique Identifier: ELEMENT_GLOBAL.2.736807
Element Code: PDROS1C1Q0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Rose Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Rosales Rosaceae Prunus
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Concept Reference
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Concept Reference: Prigge, A. B. 2002. A new species of Prunus (Rosaceae) from the Mojave Desert of California. Madrono 49(4):285-288.
Concept Reference Code: A02PRI01HQUS
Name Used in Concept Reference: Prunus eremophila
Taxonomic Comments: Prunus eremophila was recently described in 2002 from San Bernardino County, California. It is endemic to California and is distinguished from P. havordii, a close relative, by its leaf-pubescence and larger petal and fruit size (Prigge 2002, Madrono 49:285-288).
Conservation Status
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NatureServe Status

Global Status: G2
Global Status Last Reviewed: 30Jun2015
Global Status Last Changed: 03Nov2016
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G2 - Imperiled
Reasons: Prunus eremophila was described in 2002 from a narrow area in San Bernardino County, California. It is known only from a very small range and area of occupany. All 41 known sites (15 occurrences) as of 2002 were in the East Mojave National Preserve, San Bernardino County, so it is afforded protection from development. Some threats, however, are still potential and are derived from land use. Potential threats include off-road vehicle use, grazing, mining activities, fire management activities and global warming. This species has many research needs including studies on its population biology, ecology and physiology.
Nation: United States
National Status: N2

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 (S2)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: This species has a very narrow range extent. Based on the scale in Prigge 2002, it appears that the full range extent of this species is less than <20 sq. kilometers. There is one disjunct occurrence approximately 4-5km from the nearest other site (Prigge 2002). Once mapped out, the occurrences appeared to cover a range of approx. 32 sq miles.

Area of Occupancy: 1-25 4-km2 grid cells
Area of Occupancy Comments: Prunus eremophila is known from a very restricted area in San Bernardino County, California (Vontrigger Hills, Bob Cat Hills, southern Lanfair Valley, and one outlier in northeastern Fenner Valley) (Prigge 2002). Based on the scale in Prigge 2002, the area of occupancy is quite small and is probably less than 20 sq. kilometers. Calculated by CAHP in 2005 as about 132 ac.

Number of Occurrences: 6 - 20
Number of Occurrences Comments: Fourty one sites were known as of 2002 (Prigge 2002), however, these translate to 15 occurrences in CA.

Population Size Comments: As of 2002 when this species was described the average population size of the species was not known as much about its ecology and physiology were unknown at the time. When described there were some 2,000 individuals known in total (Prigge 2002).

Number of Occurrences with Good Viability/Integrity: Very few (1-3)
Viability/Integrity Comments: Minimal data accompanied the Prigge data, so this is not known. However, due to the plant's occurrence in the eastern Mojave, there must be at least a few good to excellent sites.

Overall Threat Impact: Low
Overall Threat Impact Comments: As of 2002, this species did not have any direct threats and all of the known sites were in the East Mojave National Preserve, San Bernardino County, California (Prigge 2002). Potential threats for this species are off-road vehicle use, grazing, and mining activities or global warming (Prigge 2002). As of 2010, potential threats noted by the California Native Plant Society for this species include fire management activities, grazing and vehicles (CNPS 2013, Andre 2006).

Short-term Trend: Unknown
Short-term Trend Comments: Since this was just described in 2002, short term trend is unknown.

Long-term Trend: Unknown
Long-term Trend Comments: Long term trend is unknown.

Intrinsic Vulnerability Comments: The intrinsic vulnerability of this species was not known at the time of its description. Studies on its ecology and physiology are needed (Prigge 2002).

Environmental Specificity: Unknown
Environmental Specificity Comments: Unknown.

Other NatureServe Conservation Status Information

Distribution
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Global Range: This species has a very narrow range extent. Based on the scale in Prigge 2002, it appears that the full range extent of this species is less than <20 sq. kilometers. There is one disjunct occurrence approximately 4-5km from the nearest other site (Prigge 2002). Once mapped out, the occurrences appeared to cover a range of approx. 32 sq miles.

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)
15 Piute Wash (15030102)+
18 Southern Mojave (18100100)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: Widely spreading, intricately branched shrub to 2.2 m tall; outer bark on older stems gray glaucous becoming reddish brown; inner bark orange. Branchlets grayish pubescent, weakly thorny. Leaves spathulate to ovate, 5-30mm long, serrate and sparsely villous on both surfaces. Flowers white, small. Fruit a drupe, slightly laterally compressed ovoid to orbicular.
Diagnostic Characteristics: Prunus eremophila is similar to P. havardii, which occurs in the Chihuahuan Desert of southwestern Texas and northern Mexico. P. havardii is thorny with glabrous or sparsley pubescent leaves and P. eremophila is not truly thorny with villous leaves (Prigge 2002).
Reproduction Comments: Prunus eremophla flowers from mid March to early April (Prigge 2002).
Terrestrial Habitat(s): Forest/Woodland, Shrubland/chaparral
Habitat Comments: Occurs in washes and on rocky slopes in higher elevation zones of creosote bush series and the transition zone from creosote bush to blackbush series among scattered Joshua trees. It is found on substrates made up of igneous rocks, granites and rhyolites (Prigge 2003).
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: 21Jun2004
NatureServe Conservation Status Factors Author: Oliver, L.; rev. R. Bittman 5/2005, rev. L. Oliver (2013)

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
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  • Andre, J. M. 2006a. Inventory of vascular plants at Mojave National Preserve & Manzanar Historic Site for U. S. National Park Service Inventory and Monitoring Program. Accessed online on July 17, 2013 at: http://science.nature.nps.gov/im/units/mojn/rpts_pubs/Downloads/Inventories/FinalReport_MOJA_MANZ_Plant.pdf

  • California Native Plant Society (CNPS). 2013. Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Online. Available: www.rareplants.cnps.org (Accessed 2013).

  • Flora of North America Editorial Committee. 2014b. Flora of North America North of Mexico. Vol. 9. Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York. xxiv + 713 pp.

  • Prigge, A. B. 2002. A new species of Prunus (Rosaceae) from the Mojave Desert of California. Madrono 49(4):285-288.

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