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CEGL004339 Sporobolus vaginiflorus (var. ozarkanus, var. vaginiflorus) - Hypericum dolabriforme Grassland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: (Ozark Dropseed, Poverty Dropseed) - Straggling St. John''s-wort Grassland
Colloquial Name: Southern Ridge & Valley Annual Grass Glade
Hierarchy Level: Association
Type Concept: This association accommodates vegetation dominated by annual Sporobolus species for portions of the Cumberlands and Southern Ridge and Valley of Georgia and possibly adjacent Tennessee. Stands are dominated by some combination of Sporobolus neglectus, Sporobolus vaginiflorus var. vaginiflorus, and/or Sporobolus vaginiflorus var. ozarkanus. These are typically small-patch occurrences within limestone glade complexes and are located on thinner soils when compared to perennial grass-dominated glade vegetation.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association would be found in the portions of the Cumberlands and Southern Ridge and Valley not covered by ~Sporobolus (neglectus, vaginiflorus) - Aristida longespica - Panicum flexile - Panicum capillare Grassland (CEGL004340)$$. This includes the Chickamauga Unit (Georgia) of the Chickamauga-Chattanooga National Military Park. Sporobolus neglectus is not attributed to Georgia (Kartesz 1999). This type formerly included related vegetation of the Ozark region (mistakenly thought to also be needed for the Ouachitas). This geographic portion is now accommodated by an additional placeholder, ~Sporobolus vaginiflorus var. ozarkanus Ozark Grassland (CEGL008563)$$. The association is not in Virginia. Need to clarify the identity of the annual Sporobolus species which are present.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This association, known only from the Chickamauga Unit of Chickamauga-Chattanooga National Military Park (Georgia), is dominated by annual Sporobolus species (thought to be Sporobolus vaginiflorus var. ozarkanus (= Sporobolus ozarkanus), which is difficult to distinguish from Sporobolus vaginiflorus var. vaginiflorus and Sporobolus neglectus). Some other species which are present include Asclepias verticillata, Croton capitatus, Croton monanthogynus, Stenaria nigricans var. nigricans (= Hedyotis nigricans var. nigricans), Heliotropium tenellum, Hypericum dolabriforme, Trichostema brachiatum (= Isanthus brachiatus), Manfreda virginica, and Ruellia humilis. The endemic or near-endemic Dalea gattingeri and Pediomelum subacaule are also found here. These annual grass-dominated glades are floristically similar to those of the Nashville Basin (Tennessee) and Moulton Valley (Alabama) but are treated separately.
Dynamics: No Data Available
Environmental Description: At Chickamauga-Chattanooga National Military Park (Georgia), these glades occur on dolomites and limestones of the Chickamauga and Knox groups, in contrast to the Middle Tennessee glades which occur on Lebanon and Ridley limestones of Ordovician age. These areas are very wet during periods of winter rainfall and extremely dry during the growing season, especially during the periodic droughts that are known to occur in this region. Dolomites of the Knox Group are rich in both calcium and magnesium. There are very few documented occurrences of these limestone glade environments, and these sites are often subjected to human influences such as trampling, horseback riding and off-road vehicle use. It is presumed that a number of examples have been destroyed by quarrying.
Geographic Range: This type is found in the Cumberlands and Southern Ridge and Valley of Georgia and possibly adjacent Tennessee.
Nations: US
States/Provinces: GA, TN?
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.688462
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G2G3
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 2 Shrub & Herb Vegetation Class | C02 | 2 |
| Subclass | 2.B Temperate & Boreal Grassland & Shrubland Subclass | S18 | 2.B |
| Formation | 2.B.2 Temperate Grassland & Shrubland Formation | F012 | 2.B.2 |
| Division | 2.B.2.Nc Eastern North American Grassland & Shrubland Division | D024 | 2.B.2.Nc |
| Macrogroup | 2.B.2.Nc.3 Little Bluestem - Dropseed species Central Interior Calcareous Scrub & Grassland Macrogroup | M508 | 2.B.2.Nc.3 |
| Group | 2.B.2.Nc.3.b Little Bluestem - Sideoats Grama - Diamond-flowers Central Glade & Barrens Group | G179 | 2.B.2.Nc.3.b |
| Alliance | A1815 Barrens Dropseed - Poverty Dropseed Alkaline Bedrock Annual Grassland Alliance | A1815 | 2.B.2.Nc.3.b |
| Association | CEGL004339 (Ozark Dropseed, Poverty Dropseed) - Straggling St. John''s-wort Grassland | CEGL004339 | 2.B.2.Nc.3.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: < Cedar Glade (Rogers et al. 1993)
< Glade Complex (Gallyoun et al. 1996)
< Glade Complex (Gallyoun et al. 1996)
- Gallyoun, M., G. Meyer, A. Andreu, and W. Slocumb. 1996. Mapping vegetation communities with The Nature Conservancy''s vegetation classification system on five small national parks in the southeastern USA. Unpublished report. The Nature Conservancy, Southeast Regional Office, Conservation Science Department, Chapel Hill, NC.
- Kartesz, J. T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: J. T. Kartesz and C. A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, NC.
- Rogers, C. L., M. J. Ratnaswamy, and R. J. Warren. 1993. Vegetation communities of Chickamauga Battlefield National Military Park, Georgia. Technical Report NPS/SERCHCH/NRTR-93-11. National Park Service, Southeastern Region, Atlanta, GA. 83 pp.
- Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.