Habitats of North Carolina
Habitat Group:
Habitat Type:
Members of Rock Outcrops, Glades, and Barrens:
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Rock Outcrops, Glades, and Barrens
Montane Rock Barrens
Habitat Overview Rock domes and cliffs that have small to extensive deposits of soil, sufficient to support mats of xerophytic mosses, graminoids, and other dwarf plant species. This habitat includes the most generalized of the montane outcrop specialists, including those found at both mid- to high-elevations (>4,000 ft) and on either felsic outcrops or on both felsic and mafic formations.

Species that are restricted to Amphibolite and other circumneutral to basic rock formations are treated in the Basic Montane Rock Barrens habitat, as are species restricted to high elevations. Species that are associated with vertical cliffs and shaded, more mesic or wet outcrops are also treated separately.

Related NHP Natural Communities
Determining Species
Taxa Global RankState RankProbability of Extirpation (PE)
Bryodesma tortipilum - Twisted-hair Spikemoss G3S30.0058
Carex biltmoreana - Biltmore Sedge G3S30.0058
Carex misera - Wretched Sedge G3S30.0058
Chenopodium foggii - Fogg's Goosefoot G2G3SH
Heuchera villosa - Hairy Alumroot G5S40.0007
Krigia montana - Mountain Dwarf-dandelion G3S30.0058
Liatris helleri - Heller's Blazing-star G2S20.0460
Micranthes petiolaris - Michaux's Saxifrage G4G5S40.0007
Packera millefolium - Blue Ridge Ragwort G3S20.0460
Paronychia argyrocoma - Silvery Nailwort G4S30.0058
Polygaloides paucifolia - Fringed Polygala G5S20.0460
Sabatia capitata - Appalachian Rose-gentian G2SH
Hudsonia montana - Mountain Golden-heather G1S10.3584
Juniperus communis - Common Juniper G5S10.3584
Trimerotropis saxatilis - Rock-loving Locust G3S2S30.0164
Expected Number of Extirpations with a PE value (Sum of PE) = 0.9016
N = Number of Extant Species with a PE value = 13
Average PE = ENE/N = 0.0694
Number of S5 species = 0
Proportion of Secure Species = Number of S5 Species/N = 0.0000
Habitat Risk Index = ENE x (1 – PSS) = 0.9016

Candidates for Inclusion
Habitat Sub-sets
Distribution Map
Survey Coverage Map
Survey Coverage
Survey Priorities
Average Imperilment of Habitat Members
Habitat Conservation Status
High Quality Habitat Occurrence Table
High Quality Habitat Occurrences
Protected Habitat Occurrences
Threats and Trends
Status Summary
Stewardship Recommendations
References Wiser, S.K., Peet, R.K. and White, P.S., 1996. High‐elevation rock outcrop vegetation of the Southern Appalachian Mountains. Journal of Vegetation Science 7(5):703-722. Available online at: https://pdfs.semanticscholar.org/c9e4/03cf5f01e9de50647376b9b60e0c6efcb0d6.pdf
Updated on 2019-11-17 01:42:35