Print Report

CEGL004520 Muhlenbergia reverchonii - Bouteloua hirsuta var. pectinata - Carex microdonta Grassland

Type Concept Sentence: No Data Available

Common (Translated Scientific) Name: Seep Muhly - Tall Grama - Little-tooth Sedge Grassland

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This community occurs on vernally moist (seasonally saturated), open, rocky slopes on Glen Rose Limestone, on the Edwards Plateau of central Texas. Common and characteristic species include Muhlenbergia reverchonii, Bouteloua hirsuta var. pectinata, and Carex microdonta. The abundance of Muhlenbergia reverchonii may reflect an augmentation resulting from past grazing. Other characteristic species Agalinis edwardsiana, Amsonia ciliata, Castilleja purpurea var. lindheimeri, Dodecatheon meadia, Dysodiopsis tagetoides, Eleocharis compressa var. acutisquamata, Galphimia angustifolia, Marshallia caespitosa, Oenothera macrocarpa, Paronychia virginica, Polygala alba, Pediomelum cyphocalyx, Pediomelum latestipulatum var. appressum, Spiranthes spp., Thamnosma texana, Thelesperma simplicifolium, and Vernonia lindheimeri. Other species present include Aristida purpurea, Asclepias viridiflora, Calylophus berlandieri, Carex planostachys, Centaurium beyrichii, Chamaesyce angusta, Chamaesyce fendleri, Desmanthus velutinus, Hedeoma drummondii, Stenaria nigricans var. nigricans, Heliotropium tenellum, Hymenopappus tenuifolius, Tetraneuris scaposa, Iva angustifolia, Liatris punctata var. mucronata, Melampodium leucanthum, Polygala lindheimeri, Pediomelum linearifolium, Salvia texana, Scutellaria wrightii, Sisyrinchium chilense, Sporobolus compositus, Stillingia texana, and Wedelia acapulcensis var. hispida. This community occurs in a matrix of Juniperus ashei woodlands.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: The composition and range of this association have been broadened slightly to include small wet areas on slopes near the boundary of the Walnut Clay and Comanche Peak formations at Fort Hood, Texas. There is one plot (WFC10) and one observation point (WF16) from Fort Hood that may be this type.

Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available

Floristics: Common and characteristic species include Muhlenbergia reverchonii, Bouteloua hirsuta var. pectinata (= Bouteloua pectinata), and Carex microdonta. The abundance of Muhlenbergia reverchonii may reflect an augmentation resulting from past grazing. Other characteristic species Agalinis edwardsiana, Amsonia ciliata, Castilleja purpurea var. lindheimeri, Dodecatheon meadia, Dysodiopsis tagetoides, Eleocharis compressa var. acutisquamata (= Eleocharis acutisquamata), Galphimia angustifolia, Marshallia caespitosa, Oenothera macrocarpa (= Oenothera missouriensis), Paronychia virginica, Polygala alba, Pediomelum cyphocalyx, Pediomelum latestipulatum var. appressum, Spiranthes spp., Thamnosma texana, Thelesperma simplicifolium, and Vernonia lindheimeri. Other species present include Aristida purpurea, Asclepias viridiflora, Calylophus berlandieri, Carex planostachys, Centaurium beyrichii, Chamaesyce angusta, Chamaesyce fendleri, Desmanthus velutinus, Hedeoma drummondii, Stenaria nigricans var. nigricans (= Hedyotis nigricans var. nigricans), Heliotropium tenellum, Hymenopappus tenuifolius, Tetraneuris scaposa (= Hymenoxys scaposa), Iva angustifolia, Liatris punctata var. mucronata (= Liatris mucronata), Melampodium leucanthum, Polygala lindheimeri, Pediomelum linearifolium, Salvia texana, Scutellaria wrightii, Sisyrinchium chilense (= Sisyrinchium scabrum), Sporobolus compositus (= Sporobolus asper), Stillingia texana, and Wedelia acapulcensis var. hispida (= Wedelia hispida). This community occurs in a matrix of Juniperus ashei woodlands.

At Fort Hood, this vegetation is dominated by Muhlenbergia reverchonii. The exotic grass Bothriochloa ischaemum is present in some occurrences. Common associates include Oenothera macrocarpa, Melampodium leucanthum, Asclepias viridiflora, Tragia ramosa, Desmanthus leptolobus, Vernonia baldwinii, and Salvia texana. Scattered woody plants include Yucca pallida, Quercus buckleyi, Baccharis neglecta, Juniperus ashei, Quercus fusiformis, and Vachellia farnesiana (= Acacia farnesiana).

Dynamics:  Increased moisture levels are important for maintaining this community.
Environmental Description:  This community occurs on vernally moist (seasonally saturated), open, rocky slopes on Glen Rose limestone, on the Edwards Plateau of central Texas. It has also been identified from seepage areas apparently associated with the boundary of the Walnut Clay and Comanche Peak Formations at Fort Hood, Texas.
Geographic Range: This community occurs on the Edwards Plateau of central Texas.

Nations: US

States/Provinces:  TX


Confidence Level: Low

Confidence Level Comments: No Data Available
Grank: G3?

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.Nb Central North American Grassland & Shrubland Division D023 2.B.2.Nb
Macrogroup 2.B.2.Nb.2 Needle-and-Thread - Western Wheatgrass - Plains Rough Fescue Grassland Macrogroup M051 2.B.2.Nb.2
Group 2.B.2.Nb.2.a Little Bluestem - Sideoats Grama - Western Wheatgrass Mixedgrass Prairie Group G133 2.B.2.Nb.2.a
Alliance A4040 Seep Muhly Grassland Alliance A4040 2.B.2.Nb.2.a
Association CEGL004520 Seep Muhly - Tall Grama - Little-tooth Sedge Grassland CEGL004520 2.B.2.Nb.2.a
Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available
Synonomy: No Data Available
Concept Author(s): B. Carr and A.S. Weakley

Author of Description: B. Carr, A.S. Weakley, J. Teague

Acknowledgements: No Data Available

Version Date: 07-20-07
  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.