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Trichophorum cespitosum - Calamagrostis pickeringii Alpine Snowbed | NatureServe Biotics 2019
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Name: Trichophorum cespitosum - Calamagrostis pickeringii Alpine Snowbed Reference: NatureServe Biotics 2019 Description: This graminoid-dominated association occurs on wet, sloping brows of alpine or subalpine cliffs in the Northern Appalachians. <i>Calamagrostis pickeringii</i> is the diagnostic and dominant herb, and <i>Trichophorum cespitosum</i> is often codominant. Dwarf-shrubs among the herbs include <i>Vaccinium uliginosum</i> and some typical bog ericads such as <i>Chamaedaphne calyculata, Kalmia polifolia</i>, and <i>Ledum groenlandicum</i>. Associated forbs include <i>Drosera rotundifolia, Gentiana linearis</i>, and <i>Huperzia appalachiana</i>. The vascular plants develop on a base of <i>Sphagnum</i> mosses, including <i>Sphagnum compactum</i> and several unusual species such as <i>Sphagnum lindbergii, Sphagnum tenellum</i>, and <i>Sphagnum pylaesii</i>. The liverwort <i>Scapania nemorea</i> is also characteristic. Occurrences of this association may be short-lived (compared to other alpine vegetation types), as portions may become oversaturated and slide off of the rock substrate; however, the average return interval of this major disturbance factor has been reported to be as long as 500 years. Although the graminoid dominance is characteristic of the association as a whole, it may occur as a mosaic of herb-dominated patches, shrub clusters, bryophyte carpets, and exposed bedrock.  Accession Code: urn:lsid:vegbank.org:commConcept:35066-{A1E36B17-3C7B-4969-9B4A-2C651809A50B} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 21-Mar-2003 to: ongoing
	status: accepted Community's Parent: Salix herbacea / Trichophorum cespitosum - Carex bigelowii Alpine Snowbed Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.689913 NatureServe Explorer   Code: CEGL006423   Translated: Tufted Bulrush - Pickering's Reedgrass Alpine Snowbed   Common: Northern Appalachian Alpine Bulrush Cliff   Scientific: Trichophorum cespitosum - Calamagrostis pickeringii Alpine Snowbed (convergence) and Synonyms: (similar) Trichophorum caespitosum - Calamagrostis pickeringii Herbaceous Vegetation (similar) Trichophorum caespitosum - Calamagrostis pickeringii Herbaceous Vegetation