Print Report
CEGL007797 Sedum pulchellum - Clinopodium arkansanum - Sporobolus vaginiflorus Grassland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Widow''s-cross - Limestone Calamint - Poverty Dropseed Grassland
Colloquial Name: Weches Glade
Hierarchy Level: Association
Type Concept: This community occurs on outcrops of marine sediment and glauconitic clays of the Weches Formation in central eastern Texas, primarily in San Augustine, Nacogdoches, and Sabine counties. These outcrops are exposed by natural erosion of hillside slopes. Soils are mapped as Trawick series (Mollic Hapludalfs) and are shallow, rocky, and basic, which inhibits growth of woody vegetation. Outcrops are seepy and saturated during winter and early spring but become hard and dry in the summer. Enormous seasonal variations in species dominance can occur. Other characteristic species include Valerianella radiata, Galium virgatum, Minuartia patula, Allium drummondii, Anemone caroliniana, Opuntia spp., Croton monanthogynus, Chamaesyce nutans, Arnoglossum plantagineum, and Ipomopsis rubra. Endemic annuals include Lesquerella pallida and Leavenworthia aurea var. texana. A scattered shrub layer, including Cercis canadensis, Cornus drummondii, Juniperus virginiana, Sideroxylon lanuginosum, may be present on some sites.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association occurs within the administrative boundary of the Sabine National Forest but has never been found on USFS land after extensive searches. Although related soils are present, these sites tend to be heavily forested (R. Evans pers. obs.)
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Enormous seasonal variations in species dominance can occur. Dominant and characteristic species are Sedum pulchellum, Clinopodium arkansanum, and Sporobolus vaginiflorus. Other characteristic species include Valerianella radiata, Galium virgatum, Minuartia patula (= Arenaria patula), Allium drummondii, Anemone caroliniana, Opuntia spp., Croton monanthogynus, Chamaesyce nutans (= Euphorbia nutans), Arnoglossum plantagineum (= Cacalia plantaginea), and Ipomopsis rubra. Endemic annuals include Lesquerella pallida and Leavenworthia aurea var. texana (= Leavenworthia texana). A scattered shrub layer, including Cercis canadensis, Cornus drummondii, Juniperus virginiana, Sideroxylon lanuginosum, may be present on some sites.
Dynamics: No Data Available
Environmental Description: This community occurs on outcrops of marine sediment and glauconitic clays of the Weches Formation. Soils are often mapped as Trawick series (Mollic Hapludalfs) and are shallow, rocky, and basic, which inhibits growth of woody vegetation.
Geographic Range: This community occurs in central eastern Texas, primarily in San Augustine, Nacogdoches, and Sabine counties.
Nations: US
States/Provinces: TX
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.689461
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G1
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.Nh Southeastern North American Grassland & Shrubland Division | D102 | 2.B.2.Nh |
| Macrogroup | 2.B.2.Nh.3 Poverty Dropseed - Little Bluestem - Calamint species Southern Barrens & Glade Macrogroup | M308 | 2.B.2.Nh.3 |
| Group | 2.B.2.Nh.3.a Little Bluestem - Limestone Calamint - Nuttall''s Rayless-goldenrod Southeastern Coastal Plain Barrens & Glade Group | G584 | 2.B.2.Nh.3.a |
| Alliance | A4093 Narrowleaf Marsh-elder - Limestone Calamint - Saltgrass West Gulf Coastal Plain Saline & Weches Bedrock Grassland Alliance | A4093 | 2.B.2.Nh.3.a |
| Association | CEGL007797 Widow''s-cross - Limestone Calamint - Poverty Dropseed Grassland | CEGL007797 | 2.B.2.Nh.3.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Weches Rock Outcrop Glade Community (Nixon and George 1990)
- Mahler, W. E. 1987. Leavenworthia texana (Brassicaceae), a new species from Texas. Sida 12(1):239-242.
- Nixon, E. S., J. R. Ward, and B. L. Lipscomb. 1983b. Rediscovery of Lesquerella pallida (Cruciferae). Sida 10:167-175.
- Nixon, E. S., and R. J. George. 1990. The herbaceous flora of three Weches formation outcrops in eastern Texas. Sida 14:117-127.
- Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.
- USFWS [U.S. Fish and Wildlife Service]. 1992. White bladderpod (Lesquerella pallida) recovery plan. U.S. Fish and Wildlife Service, Albuquerque, NM. 22 pp.