Eriogonum callistum - Reveal
Tehachapi Buckwheat
Taxonomic Status: Provisionally accepted
Unique Identifier: ELEMENT_GLOBAL.2.818653
Element Code: PDPGN08790
Informal Taxonomy: Plants, Vascular - Flowering Plants - Buckwheat Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Polygonales Polygonaceae Eriogonum
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Concept Reference
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Concept Reference: Reveal, J. L. 2006. Eriogonum callistum (Polygonaceae), a new species from the Tehachapi Mountains of California. SIDA 22(2): 857-861.
Concept Reference Code: A06REV03HQUS
Name Used in Concept Reference: Eriogonum callistum
Taxonomic Comments: Newly described in 2006, the species is distinguished from other Eriogonum taxa based on its growth habit, vegetative characteristics, and its possession of "pilose flowers on hairy pedicels arranged in... capitate inflorescence(s)" (Reveal 2006). Its discovery also prompted the description of a new section of the genus (Sect. Lanocephala, of the subgenus Eucycla), of which it is currently the sole member. Reveal (2006) notes that "the discovery of another undescribed member of Eriogonum Michx. from California is not, in itself, a surprise, but one so distinct as to represent a new section... is at least unusual."
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 10Feb2015
Global Status Last Changed: 08Sep2008
Rounded Global Status: G1 - Critically Imperiled
Reasons: A newly-described species known only from the Tehachapi Mountains of Kern County, California. Three herbarium collections have been made, but it is not clear whether these are from separate occurrences or the same occurrence. Known locations of this species altogether contain approximately 2000 individuals in a variety of age classes. All known sites are on private land; potentially threatened by urban and energy development.
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

NatureServe Global Conservation Status Factors

Range Extent Comments: Known solely from the Tehachapi Mountains of Kern County, California.

Number of Occurrences: 1 - 5
Number of Occurrences Comments: Known solely from three herbarium collections from the Tehachapi Mountains. It is not clear whether these collections are from three separate occurrences or if they are multiple collections from the same occurrence. Reveal (2006) states that the species is "known only from a few scattered locations."

Population Size Comments: Reveal (2006) states that the known locations of this species "altogether contain 2000 individuals in a variety of age classes."

Overall Threat Impact Comments: The only known ocurrence(s) are found on private land. The species was originally discovered during botanical surveys associated with a proposed power plant and transmission lines. Potentially threatened by urban and energy development.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Known solely from the Tehachapi Mountains of Kern 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.
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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 Kern (06029)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
18 Antelope-Fremont Valleys (18090206)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: Herbaceous (woody at the base) perennial forming a rounded mound of leaves. Flowers are individually small but numerous, together forming a round cluster atop long, slender leafless flowering stems. Bright white flowers bloom from May to July.
Terrestrial Habitat(s): Shrubland/chaparral
Habitat Comments: Occurs on rocky outcrops within openings in mixed-chaparral habitats on limestone-derived soils. Associated taxa include Adenostoma fasciculatum, Amelanchier utahensis, Arctostaphylos glauca, Arctostaphylos parryana, Hesperoyucca whipplei, Ceanothus cuneatus, Quercus berberidifolia, Tauschia parishii, Castilleja martinii, and Cordylanthus eremicus. 1400 - 1500 m.
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: 17Oct2008
NatureServe Conservation Status Factors Author: N. Jensen, R. Bittman, K. Gravuer

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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  • Reveal, J. L. 2006. Eriogonum callistum (Polygonaceae), a new species from the Tehachapi Mountains of California. SIDA 22(2): 857-861.

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