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CEGL004256 Quercus rubra - Fraxinus americana - Acer saccharum / Actaea racemosa - Caulophyllum thalictroides Forest

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Northern Red Oak - White Ash - Sugar Maple / Black Baneberry - Blue Cohosh Forest

Colloquial Name: Southern Appalachian High-Elevation Red Oak Forest (Rich Type)

Hierarchy Level:  Association

Type Concept: This is a rich, high-elevation red oak forest that occurs on amphibolite or other mafic rock in the Southern Blue Ridge of North Carolina and possibly adjacent Tennessee. Quercus rubra is constant and dominant but sometimes only weakly so. Fraxinus americana and Acer saccharum are generally abundant and have high constancy. Carya species are generally abundant. Quercus alba, Quercus montana, and Prunus serotina are fairly frequent and sometimes abundant. Other mesophytic trees such as Betula lenta, Betula alleghaniensis, Tilia americana var. heterophylla, and Aesculus flava are sometimes present.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: These communities have been treated as part of ~Quercus rubra / (Vaccinium simulatum, Rhododendron calendulaceum) / (Dennstaedtia punctilobula, Thelypteris noveboracensis) Forest (CEGL007300)$$ but are quite distinct floristically. An analysis of data from Virginia and North Carolina supports the hypothesis that it is sufficiently distinct from the Central Appalachian ~Quercus rubra - Carya ovata - Fraxinus americana / Actaea racemosa - Hydrophyllum virginianum Forest (CEGL008518)$$ to be recognized as a distinct association.

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: Quercus rubra is constant and dominant but sometimes only weakly dominant. Fraxinus americana and Acer saccharum are generally abundant and have high constancy. Some Carya species (most often Carya glabra or Carya ovata) are generally abundant. Quercus alba, Quercus montana (= Quercus prinus), and Prunus serotina are fairly frequent and sometimes abundant. Other mesophytic trees such as Betula lenta, Betula alleghaniensis, Tilia americana var. heterophylla, and Aesculus flava are sometimes present. The subcanopy is generally dominated by the same species, although Ostrya virginiana, Acer pensylvanicum, and other small trees are often present. The shrub layer is open, with species composition variable. The herb layer is lush and diverse compared to other communities in similar topographic settings. It includes a mix of forbs typical of rich mesic sites as well as more widespread species of high elevations. Actaea racemosa, Caulophyllum thalictroides, Prosartes lanuginosa, and Collinsonia canadensis are the most constant base-loving species, and Maianthemum racemosum, Solidago curtisii, Arisaema triphyllum, Silene stellata, Eurybia chlorolepis, and Symphyotrichum cordifolium are other common herbs. Other species with lower constancy include Convallaria majuscula (= Convallaria montana), Impatiens pallida, Solidago flexicaulis, Asclepias exaltata, Uvularia perfoliata, Tradescantia subaspera, Aquilegia canadensis, Streptopus lanceolatus var. roseus (= Streptopus roseus), Osmunda claytoniana, and Botrychium virginianum.

Dynamics:  Canopies naturally exist as uneven-aged old-growth forests, with tree regeneration occurring in small to moderate-sized canopy gaps created by wind, ice damage, lightning, or fire. As with other Southern Blue Ridge high-elevation red oak forests, this association frequently shows a lack of oak regeneration and a dense understory of more mesophytic species that capture canopy gaps. Fire is believed to be important for maintaining oak dominance by reducing this understory and favoring oak advanced regeneration, but the natural frequency of fire is not well-known. Castanea dentata was once present in at least some examples, perhaps most. Examples have been altered by its removal as a canopy species. Most examples have also been affected by logging, but logging was often selective. Forest grazing was widespread and may have affected all examples.

Environmental Description:  This community occurs in exposed topographic settings at high elevations in the Southern Blue Ridge where the substrate is amphibolite or other mafic rock. Examples range from 970 to 1680 m (3200-5500 feet) elevation, with most examples between 1270 and 1525 m (4200-5000 feet). It is generally found on ridgetops or south- and west-facing slopes. All known examples appear to occur on amphibolite. High base status in the soil is likely a crucial factor in the occurrence of this association.

Geographic Range: This community type is known from several scattered locations in the Southern Blue Ridge of North Carolina. It is most extensive in the Amphibolite Mountains of Ashe and Watauga counties but occurs in small amounts in the Craggy Mountains, Great Balsam Mountains, and possibly the Roan Mountain area. A few examples may possibly occur in adjacent Tennessee.

Nations: US

States/Provinces:  NC, TN?




Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: G2

Greasons: No Data Available


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): M.P. Schafale

Author of Description: M.P. Schafale

Acknowledgements: No Data Available

Version Date: 12-03-08

  • NCNHP [North Carolina Natural Heritage Program]. No date. Unpublished data. North Carolina Department of Environment and Natural Resources, Natural Heritage Program, Raleigh.
  • Schafale, M. P. 2012. Classification of the natural communities of North Carolina, 4th Approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh.
  • Schafale, Mike P. Personal communication. Ecologist, North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh.
  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.