Monardella stoneana - Elvin & A.C. Sanders
Jennifer's Mondarella
Taxonomic Status: Provisionally accepted
Unique Identifier: ELEMENT_GLOBAL.2.737191
Element Code: PDLAM180Y0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mint Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Lamiales Lamiaceae Monardella
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Concept Reference
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Concept Reference: Elvin, M. A., and A. C. Sanders. 2003. A new species of Monardella (Lamiaceae) from Baja California, Mexico and Southern California, United States. Novon 13:425-432.
Concept Reference Code: A03ELI01HQUS
Name Used in Concept Reference: Monardella stoneana
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 20May2009
Global Status Last Changed: 06Jul2004
Rounded Global Status: G1 - Critically Imperiled
Reasons: Mondarella stoneana is a restricted species, described in 2003, and is known from a very small area in the United States and Mexico. Five occurrences of this species have been located in San Diego County, California, United States and nearby Baja California, Mexico. There is one outlying occurrence some 50 km south of the other occurrences and 75 km north of Ensenada, Baja California Mexico. There is a total of 6 occurrences known. This species is only found growing among boulders, in crack and among stones along intermittent streams.
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

Comments on USESA: This taxon represented a portion of Monardella linoides ssp. viminea, which was Listed Endangered. As of the Federal Register document of March 6, 2012, the U.S. Fish and Wildlife Service recognizes the change to the taxonomy of Monardella linoides ssp. viminea, in which the subspecies was split into two distinct full species, Monardella viminea and Monardella stoneana. "We retain the listing status of Monardella viminea as endangered, and we remove protections afforded by the Act from those individuals now recognized as the separate species, Monardella stoneana,because the new species does not meet the definition of endangered or threatened under the Act."
U.S. Fish & Wildlife Service Lead Region: R8 - California-Nevada

NatureServe Global Conservation Status Factors

Range Extent Comments: The range extent of Mondardella stoneana is approximately 50 km. There are 5 occurrences in southern California in San Diego County and northern Baja California, Mexico that is adjacent to San Diego County. There is one outlying occurrence in Baja California, Mexico some 75 km north of Ensenada (Elvin and Sanders 2003).

Area of Occupancy: 3-125 4-km2 grid cells
Area of Occupancy Comments: The map provided in Elvin and Sanders 2003, shows a very small area of occupancy. The area of occupany of this species, based on the map provided by Elvin and Sanders 2003 appears to be less than 30 sq. km.

Number of Occurrences: 6 - 20
Number of Occurrences Comments: There are only 6 known occurrences of this species. Five of the occurrences are in the United States in southern California in San Diego County and in the portion of Baja California, Mexico that's immediately adjacent. There is an outlying occurrence that is that is 50 km south from the other occurrences in Arroyo Jatay, Baja California Mexico, which is 75km north of Ensenada (Elvin and Sanders 2003).

Population Size Comments: C is a guess.

Number of Occurrences with Good Viability/Integrity: Unknown
Viability/Integrity Comments: CNDDB has no information yet on EO viability.

Overall Threat Impact: Very high - high
Overall Threat Impact Comments: The threat of development is always high in San Diego County. Other threats may also be severe; need more info on this.

Short-term Trend: Decline of 10-30%
Short-term Trend Comments: Although we have little information on threats and trends, this plant occurs near the Mexican border in an area that receives constant pressure from both development and immigrant intrusion. The recent trend has to be downwards.

Long-term Trend: Decline of 30-70%
Long-term Trend Comments: Although we have no information on long term trends, we are assuming that, due to the location of this plant in two drainages near Mexico, and due to the high level of human pressures there, that the trend has been down.

Intrinsic Vulnerability Comments: This plant occupies a narrow niche along ephemeral streamcourses in a very small area. Very vulnerable.

Environmental Specificity: Narrow. Specialist or community with key requirements common.
Environmental Specificity Comments: This species requires a riparian habitat and occurs in intermittent streams that carry water for several weeksto months during and after the winter rainy season (Elvin and Sanders 2003). Specifically, Mondardella stoneana grows among boulders, stones and in the cracks of bedrock of the intermittent streams in rocky gorges that are surrounded by coastal sage scrub and chaparral. It is found between 10-660m in elevation (Elvin and Sanders 2003).

Other NatureServe Conservation Status Information

Distribution
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Global Range: The range extent of Mondardella stoneana is approximately 50 km. There are 5 occurrences in southern California in San Diego County and northern Baja California, Mexico that is adjacent to San Diego County. There is one outlying occurrence in Baja California, Mexico some 75 km north of Ensenada (Elvin and Sanders 2003).

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.

National Distribution Outside of U.S. & Canada: Mexico

U.S. Distribution by County Help
State County Name (FIPS Code)
CA San Diego (06073)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
18 San Diego (18070304)+, Cottonwood-Tijuana (18070305)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History Not yet assessed
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Basic Description: Monardella stoneana is a subshrub with stems spreading to erect and mostly lanceolate leaves. Leaf glands are sparse below. Bracts are 7-10mm long, roughly equal to calyces; seeds are greater than 1.9mm long. Plants known from streambanks.
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: 06Jul2004
NatureServe Conservation Status Factors Author: Oliver, L., rev. R. Bittman 5/2005

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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  • Elvin, M. A., and A. C. Sanders. 2003. A new species of Monardella (Lamiaceae) from Baja California, Mexico and Southern California, United States. Novon 13:425-432.

  • U.S. Fish and Wildlife Service. 2012. Revised endangered status, revised critical habitat designation, and taxonomic revision for Monardella linoides ssp. viminea. Federal Register 77(44): 13394-13447.

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