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A1685 Carex scabrata - Chrysosplenium americanum Seep Alliance

The U.S. National
Vegetation Classification
Type Concept Sentence: This alliance accommodates small seepages with scattered cover of Carex scabrata and small forbs, including Chrysosplenium americanum, Cardamine clematitis, Circaea alpina, and usually also with the moss Rhizomnium appalachianum. Vegetation in this alliance is normally over-shaded by trees rooted in adjacent (non-wetland) communities. The alliance is distributed primarily in the Appalachian Mountains from New Hampshire and Vermont south to West Virginia, and possibly in adjacent Canada.
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Common (Translated Scientific) Name: Eastern Rough Sedge - Golden-saxifrage Seep Alliance
Colloquial Name: Eastern Rough Sedge - Golden-saxifrage Seep
Hierarchy Level: Alliance
Type Concept: This alliance accommodates small herbaceous seepages with scattered cover of Carex scabrata and small forbs, including Chrysosplenium americanum, Cardamine clematitis, Circaea alpina, and usually also with the moss Rhizomnium appalachianum. Vegetation in this alliance is normally over-shaded by trees rooted in adjacent (non-wetland) communities. The spatial extent of this alliance is small, with individual occurrences normally much less than a hectare in size. Despite its small spatial scale, this alliance is an important component of the diversity of the landscapes in which it occurs. The alliance is distributed primarily in the Appalachian Mountains from New Hampshire and Vermont south to West Virginia, and possibly in adjacent Canada.
Diagnostic Characteristics: These are small Central and Northern Appalachian seepages with Chrysosplenium americanum as a characteristic forb.
Rationale for Nominal Species or Physiognomic Features:
Classification Comments: Chrysosplenium americanum as a species ranges south to the most northern counties of Alabama, Georgia, and South Carolina, but these are very small-scale occurrences, and this vegetation is not recognized in the Southern Appalachians.
Similar NVC Types:
Diphylleia cymosa - Saxifraga micranthidifolia Seep Alliance, note:
Carex atlantica - Solidago patula - Parnassia asarifolia Seep Alliance, note:
Carex gynandra - Glyceria melicaria - Glyceria striata Seep Alliance, note:
Lyonia ligustrina - Photinia pyrifolia / Drosera rotundifolia Seep Alliance, note:
Sanguisorba canadensis - Parnassia grandifolia Seep Alliance, note:
Physiognomy and Structure: Vegetation in this alliance is normally over-shaded by trees rooted in adjacent (non-wetland) communities. The spatial extent of this alliance is small, with individual occurrences normally much less than a hectare in size.
Floristics: Examples are dominated by of Carex scabrata and small forbs, including Chrysosplenium americanum, Cardamine clematitis, Circaea alpina, and usually also with the moss Rhizomnium appalachianum.
Dynamics: No Data Available
Environmental Description: This alliance consists of small seepages in the Appalachian Mountains with scattered cover of small forbs.
Geographic Range: The alliance is distributed primarily in the Appalachian Mountains from New Hampshire and Vermont south to West Virginia. It is possibly found in adjacent Canada.
Nations: CA?, US
States/Provinces: CT, DE, MA, MD, NH, NJ, NY, PA, RI, VA, VT, WV
US Forest Service Ecoregions (1994/1995)
Domain Name:
Division Name:
Province Name: Southeastern Mixed Forest Province
Province Code: 231    Occurrence Status: Possible
Section Name: Western Unglaciated Allegheny Plateau Section
Section Code: 221F     Occurrence Status: Possible
Omernik Ecoregions:
Confidence Level: Moderate
Confidence Level Comments:
Grank: GNR
Greasons:
Concept Lineage: This alliance accommodates all the members of the old Chrysosplenium americanum Saturated Herbaceous Alliance (A.1685), but with different nominals.
Predecessors:
Obsolete Names:
Obsolete Parents:
Synonomy: ? Spring Community (Smith 1991)
? Spring Run Community (Smith 1991)
Concept Author(s): M. Pyne, in Faber-Langendoen et al. (2013)
Author of Description: M. Pyne and D. Faber-Langendoen
Acknowledgements:
Version Date: 18Dec2014
References:
  • Faber-Langendoen, D., J. Drake, M. Hall, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, L. Sneddon, K. Snow, and J. Teague. 2013-2017b. Screening alliances for induction into the U.S. National Vegetation Classification: Part 1 - Alliance concept review. NatureServe, Arlington, VA.
  • Fike, J. 1999. Terrestrial and palustrine plant communities of Pennsylvania. Pennsylvania Natural Diversity Inventory. Pennsylvania Department of Conservation and Recreation, Bureau of Forestry, Harrisburg, PA. 86 pp.
  • Smith, T. L. 1991. Natural ecological communities of Pennsylvania. First revision. Unpublished report. Pennsylvania Science Office of The Nature Conservancy, Middletown, PA. 111 pp.