Print Report

CEGL006093 Thuja occidentalis / Oligoneuron album Rocky Outcrop

Type Concept Sentence: Open calcareous rock vegetation, with scattered Thuja occidentalis trees, on ridgetops in the northeastern lakeplains of New Hampshire, New York and Vermont.


Common (Translated Scientific) Name: Northern White-cedar / Prairie Goldenrod Rocky Outcrop

Colloquial Name: New England Calcareous Rocky Ridge

Hierarchy Level:  Association

Type Concept: This open calcareous rock vegetation, with scattered Thuja occidentalis trees, occurs on ridgetops in the northeastern lakeplains of New Hampshire, New York and Vermont. This is a rare community. Ecological processes and species composition are most similar to the red oak - pine rocky ridge and red spruce - heath - cinquefoil rocky ridge communities described elsewhere, with which it shares many species [see those descriptions]. Soils are similar to other rocky ridges as well, with thin, turfy organic and A horizons over thin, gravelly or sandy B or C horizons. They are well- to excessively well-drained and of low overall productivity.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: Type was long proposed for merger with CEGL006530, and that is now completed here. It is moved to a new Class (Rock Vegetation). CEGL006530 was already made inactive (no states were attributed to it), and the description content was used for the description here, along with content from New Hampshire.

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

Physiognomy and Structure: This sparsely vegetated community is characterized by a heterogeneous mix of scrubby trees or shrubs and an open herbaceous layer.

Floristics: Woody plants include Thuja occidentalis, Juniperus horizontalis, Dasiphora fruticosa ssp. floribunda (= Pentaphylloides floribunda), Lonicerai dioica, Vaccinium angustifolium, Sorbus americana, and Alnus viridis ssp. crispa (= Alnus crispa). Herbaceous species include graminoids Carex scirpoidea, Deschampsia flexuosa, Danthonia spicata, ferns Woodsia ilvensis, and delicate forbs, such as Oligoneuron album (= Solidago ptarmicoides), Campanula rotundifolia, Lechea intermedia Orobanche uniflora, and Sibbaldiopsis tridentata (= Potentilla tridentata).

Dynamics:  No Data Available

Environmental Description:  Sites occur on calcareous to circumneutral rocky summits and ridges of moderate to high elevations. Soils are shallow.

Geographic Range: This type occurs on calcareous to circumneutral rocky summits and ridges in the lakeplain of New York, Vermont, and New Hampshire.

Nations: CA?,US

States/Provinces:  NH, NY, QC?, VT




Confidence Level: Low

Confidence Level Comments: No Data Available

Grank: GNR

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): Northern Appalachian Planning Team

Author of Description: D. Faber-Langendoen and B. Nichols

Acknowledgements: Northern Appalachian Planning Team

Version Date: 10-26-18

  • Eastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boston, MA.
  • Thompson, E. H., and E. R. Sorenson. 2005. Wetland, woodland, wildland: A guide to the natural communities of Vermont. The Nature Conservancy and the Vermont Department of Fish and Wildlife. University Press of New England, Hanover, NH. 456 pp.