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CEGL001639 Pleuraphis mutica - Panicum obtusum Grassland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Tobosa Grass - Vine-mesquite Grassland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This Chihuahuan Desert lowland grassland association is known from southern New Mexico, Trans-Pecos Texas, and southeastern Arizona, and probably occurs in northern Mexico. It commonly occurs in closed basin bottoms, swales, playas or occasionally on lava flows at low elevations from 1300-1525 m (4250-5000 feet). Pleuraphis mutica is dominant and abundant. The presence of Panicum obtusum is diagnostic of the playa-like setting of this association. Overall, diversity is moderate with 32 species recorded for type. Shrubs are not significant.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association is known from TNC Gray Ranch Preserve in extreme southwestern New Mexico. This vegetation needs to be compared to similar types documented in Texas and its presence in that state confirmed. More information is needed on its composition and dynamics.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Pleuraphis mutica (= Hilaria mutica) is dominant and abundant. The presence of Panicum obtusum is diagnostic of the playa-like setting of this association. Overall, diversity is moderate with 32 species recorded for type. Shrubs are not significant.
Dynamics: No Data Available
Environmental Description: This Chihuahuan Desert lowland grassland association commonly occurs in closed basin bottoms, swales, playas or occasionally on lava flows at low elevations from 1300-1525 m (4250-5000 feet).
Geographic Range: This association is known from southern New Mexico, Trans-Pecos Texas, and southeastern Arizona, and probably occurs in northern Mexico.
Nations: MX?,US
States/Provinces: AZ, MXCHH?, MXCOA?, MXSON?, NM, TX
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.684961
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G3
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 3 Desert & Semi-Desert Class | C03 | 3 |
| Subclass | 3.A Warm Desert & Semi-Desert Woodland, Scrub & Grassland Subclass | S06 | 3.A |
| Formation | 3.A.2 Warm Desert & Semi-Desert Scrub & Grassland Formation | F015 | 3.A.2 |
| Division | 3.A.2.Na North American Warm Desert Scrub & Grassland Division | D039 | 3.A.2.Na |
| Macrogroup | 3.A.2.Na.3 Black Grama - Bullgrass - Tobosa Grass Chihuahuan Semi-Desert Grassland Macrogroup | M087 | 3.A.2.Na.3 |
| Group | 3.A.2.Na.3.d Tobosa Grass - Alkali Sacaton - Vine-mesquite Semi-Desert Lowland Grassland Group | G489 | 3.A.2.Na.3.d |
| Alliance | A3185 Tobosa Grass Lowland Desert Grassland Alliance | A3185 | 3.A.2.Na.3.d |
| Association | CEGL001639 Tobosa Grass - Vine-mesquite Grassland | CEGL001639 | 3.A.2.Na.3.d |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Hilaria mutica - Panicum obtusum PA (Muldavin et al. 1998a)
= Hilaria mutica - Panicum obtusum PA (Bourgeron et al. 1995a)
= Hilaria mutica - Panicum obtusum PA (Bourgeron et al. 1993b)
= Hilaria mutica Community (Johnson 1961c)
= Hilaria mutica - Panicum obtusum PA (Bourgeron et al. 1995a)
= Hilaria mutica - Panicum obtusum PA (Bourgeron et al. 1993b)
= Hilaria mutica Community (Johnson 1961c)
- Bourgeron, P. S., L. D. Engelking, H. C. Humphries, E. Muldavin, and W. H. Moir. 1993b. Assessing the conservation value of the Gray Ranch: Rarity, diversity and representativeness. Unpublished report prepared for The Nature Conservancy by the Western Heritage Task Force, Boulder, CO. (Volume I and II).
- Bourgeron, P. S., L. D. Engelking, H. C. Humphries, E. Muldavin, and W. H. Moir. 1995a. Assessing the conservation value of the Gray Ranch: Rarity, diversity and representativeness. Desert Plants 11(2-3):3-68.
- Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.
- Johnson, D. E. 1961c. Edaphic factors affecting the distribution of creosotebush (Larrea tridentata (DC.) Cov.) in desert grassland sites of southeastern Arizona. Unpublished thesis, University of Arizona, Tucson. 58 pp.
- Muldavin, E., V. Archer, and P. Neville. 1998a. A vegetation map of the Borderlands Ecosystem Management Area. Final report submitted to USDA Forest Service, Rocky Mountain Experiment Station, Flagstaff, AZ, by the New Mexico Natural Heritage Program, University of New Mexico, Albuquerque, NM. 58 pp.
- NHNM [Natural Heritage New Mexico]. No date. Unpublished data on file. Natural Heritage New Mexico, University of New Mexico, Albuquerque.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.