Erigeron hessii - Nesom
Hess' Fleabane
Taxonomic Status: Accepted
Related ITIS Name(s): Erigeron hessii G.L. Nesom (TSN 35877)
Unique Identifier: ELEMENT_GLOBAL.2.142858
Element Code: PDAST3M1T0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Erigeron
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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: Erigeron hessii
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 08Sep2010
Global Status Last Changed: 02Jun1989
Rounded Global Status: G1 - Critically Imperiled
Reasons: Known only from two rock outcrops in the Gila Wilderness of New Mexico, one of which is a scenic overlook near a hiking trail, but both are in otherwise remote areas (likely < 10 sq. km). Trend information is not known but each population only consists of a few hundred individuals.
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 New Mexico (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: It is narrowly endemic and only known from two locations in New Mexico, in southern Catron County, Mogollon Mountains (Knight and Cully, 1985).

Area of Occupancy: 1-125 4-km2 grid cells
Area of Occupancy Comments:  

Number of Occurrences: 1 - 5
Number of Occurrences Comments: It is a very narrow endemic of the Mogollon Mountains in southwestern New Mexico in Catron Co. It is presently known from only two locations in a remote area in the vicinity of Whitewater Baldy in the Gila National Forest in New Mexico (Sivinski, 1998). Each population is scattered over crevices of exposed rock (Nesom, 1978) consists of only a few hundred plants.

Population Size Comments: Each of the two populations consist of only a few hundred plants (Nesom, 1978; Sivinski, 1998).

Overall Threat Impact: Medium
Overall Threat Impact Comments: It can be implied that hikers may trample plants that occur on the top of the formation at the scenic overlook but documentation of this threat is lacking although Nesom (1978) and NMPPAC (1984) state that at one site, it occurs along one or more trails. Known populations of this species are within the Gila Wilderness and are not threatened by any current land use (Sivinski, 1998; NMPPAC).

Short-term Trend: Unknown
Short-term Trend Comments: Known populations of this species are within the Gila Wilderness and are not threatened by any current land use. Additional surveys of suitable rock outcrops within this remote region are needed to determine the presence of other populations.

Long-term Trend: Unknown

Environmental Specificity: Unknown

Other NatureServe Conservation Status Information

Distribution
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Global Range: It is narrowly endemic and only known from two locations in New Mexico, in southern Catron County, Mogollon Mountains (Knight and Cully, 1985).

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 NM

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
NM Catron (35003)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
15 Upper Gila (15040001)+, Upper Gila-Mangas (15040002)+*, San Francisco (15040004)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A perennial herb, 5-16 cm tall, with white ray and yellow disk flowers in bloom in August.
Reproduction Comments: Flowers August to early September (Reed, 1996).
Terrestrial Habitat(s): Alpine, Bare rock/talus/scree, Forest - Conifer, Forest/Woodland, Grassland/herbaceous
Habitat Comments: This species is native to a Rocky Mountain subalpine conifer forest to subalpine grassland; often in crevices of exposed rhyolitic rock outcrops at 2900 to 3100 m elevation (Sivinski and Lightfoot, 1994).
Economic Attributes Not yet assessed
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Management Summary
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Stewardship Overview: Although only known from a few hundred plants each in two locations in close proximity, known populations of this species are within the Gila Wilderness of New Mexico and are not threatened by any current land use including overutilization for recreational purposes. Because one of the two rock outcrops in the Gila Wilderness is a scenic overlook near a hiking trail and efforts to prevent trampling should be instituted. Additional surveys of suitable rock outcrops within this remote region are needed to determine the presence of other populations.
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: 08Sep2010
NatureServe Conservation Status Factors Author: DeBruin, E. and K. Maybury (1996); A. Olivero (2003); Cordeiro, J. (2010)
Management Information Edition Date: 13Sep2010
Management Information Edition Author: Cordeiro, J.
Element Ecology & Life History Edition Date: 08Sep2010
Element Ecology & Life History Author(s): Cordeiro, J.

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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  • 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.

  • Knight, P. and A. Cully. 1985. Status report on Erigeron hessii. New Mexico Forestry Division Report submitted to U.S. Fish & Wildlife Service, New Mexico Ecological Services Field Office, Albuquerque, New Mexico.

  • Nesom, G. 1978. Erigeron hessii sp. nov. and Erigeron kuschei Eastwood (Compositae), two closely related narrow endemics from the southwestern United States. Brittonia 30(4): 440-446.

  • New Mexico Native Plant Protection Advisory Committee. 1984. A handbook of rare and endemic plants of New Mexico. Univ. New Mexico Press, Albuquerque. 291 pp.

  • Reed, S. 1996. Genetic variation and population structure in four rare species of Erigeron from the American southwest. Unpublished MS Thesis, University of New Mexico, Albuquerque, New Mexico.

  • Sivinski, R. 1998. New Mexico Rare Plants: Erigeron hessii (Hess' fleabane). New Mexico Rare Plant Technical Council, Albuquerque, New Mexico. Online. Available: http://nmrareplants.unm.edu (Version 15 March 2002). Accessed 2003, June 3.

  • Sivinski, R., and K. Lightfoot, eds. 1994. Inventory of the rare and endangered plants of New Mexico. 2nd edition. Miscellaneous Publication No. 3, New Mexico Forestry and Resources Conservation Division, New Mexico Energy, Minerals and Natural Resources Dept., Santa Fe. 46 pp.

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