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Alliance Detail Report: A1871
Impatiens pallida - Equisetum scirpoides - Parnassia glauca Seep Alliance

The U.S. National
Vegetation Classification
This vegetation is found in the northern regions of the Great Lakes in the United States. Stands occur on toeslopes, where constant seepage creates saturated clay soils. Substrate is neither mucky not peaty. Stands are often shaded (up to 90% cover) by adjacent forest types, including Tsuga canadensis- and Acer saccharum-dominated stands. Trees rarely occur in the seepage zone itself, which can be as much as 30 m wide. Characteristic plants include Equisetum scirpoides (often dominant) and Impatiens pallida.
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Translated Name:Pale Touch-me-not - Dwarf Scouring-rush - Fen Grass-of-Parnassus Seep Alliance
Colloquial Name:Great Lakes Clay Seep
This vegetation is found in the northern regions of the Great Lakes in the United States. Stands occur on toeslopes, where constant seepage creates saturated clay soils. Substrate is neither mucky not peaty. Stands are often shaded (up to 90% cover) by adjacent forest types, including Tsuga canadensis- and Acer saccharum-dominated stands. Trees rarely occur in the seepage zone itself, which can be as much as 30 m wide. Characteristic plants include Equisetum scirpoides (often dominant) and Impatiens pallida.
This alliance includes apparently distinctive vegetation of clay-based seepage areas in the northern regions of the Great Lakes. It is distinguished on floristic, landform, and biogeographic criteria.
Vegetation Hierarchy
Name:Database Code:Classification Code:
Class 2 Shrub & Herb Vegetation C02 2
Subclass 2.C Shrub & Herb Wetland S44 2.C
Formation 2.C.4 Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland F013 2.C.4
Division 2.C.4.Nd Eastern North American Temperate & Boreal Freshwater Marsh, Wet Meadow & Shrubland D323 2.C.4.Nd
Macrogroup M061 Eastern North American Cool Temperate Seep M061 2.C.4.Nd.1
Group G189 North-Central & Northeastern Seep G189 2.C.4.Nd.1.c
Alliance A1871 Great Lakes Clay Seep A1871
Association CEGL005163 Clay Seeps CEGL005163
Old alliance Clay Slopes Sparsely Vegetated Alliance (A.1871) and its single association are assigned to this new alliance, due to its range and distinctive flora. There are apparently no similar types. Perhaps there is similar vegetation in Canada. Its group placement should be reviewed. The concept is based on field sites observed by E. Epstein in Wisconsin.
Synonomy:

Related Type Name:

Short Citation:
  • Faber-Langendoen et al. 2017b
States/Provinces:MI?, WI
Nations:CA?, US
Range:This alliance is found in the northern regions of the Great Lakes in the United States. There may be similar vegetation in Canada.
US Forest Service Ecoregions
Domain Name:
Division Name:
Province Name:Laurentian Mixed Forest Province
Province Code:212   Occurrence Status:Confident or certain
Section Name:Southern Superior Uplands Section
Section Code:212J     Occurrence Status:Confident or certain
Stands are often shaded (up to 90% cover) by adjacent forest types, including Tsuga canadensis- and Acer saccharum-dominated stands. Trees rarely occur in the seepage zone itself, which can be as much as 30 m wide.
Characteristic plants in stands of this alliance include Equisetum scirpoides (often dominant) and Impatiens pallida. Other species in northern Wisconsin include Cypripedium reginae, Cypripedium parviflorum, Equisetum arvense and, rarely, Parnassia palustris and Parnassia glauca. In southeastern Wisconsin, common species include Gentianopsis virgata (= Gentianopsis procera), Oligoneuron ohioense (= Solidago ohioensis), and Triantha glutinosa (= Tofieldia glutinosa). Other fen plants may also occur. Epipactis helleborine is a common exotic orchid.
Stands of this alliance occur on toeslopes, where constant seepage creates saturated clay soils. Substrate is neither mucky not peaty.
Low
Unstable bluffs generally support a more "weedy" flora, resembling that of the surrounding forest.
Authors:
D. Faber-Langendoen      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.


USNVC Credits: Detailed Description of the National Vegetation Classification Types

Date Accessed:

To cite a description:
Author(s). publicationYear. Description Title [last revised revisionDate]. United States National Vegetation Classification. Federal Geographic Data Committee, Washington, D.C.

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About this document
This document contains type descriptions at the Alliance level of the U.S. National Vegetation Classification. These descriptions were primarily written by NatureServe ecologists in collaboration with Federal Geographic Data Committee Vegetation Subcommittee and a wide variety of state, federal and private partners as a part of the implementation of the National Vegetation Classification. Formation descriptions were written by the Hierarchy Revisions Working Group. The descriptions are based on consultation with natural resource professionals, published literature, and other vegetation classification systems. The Ecological Society of America's Panel on Vegetation Classification is responsible for managing the review and formal adoption of these types into the National Vegetation Classification. Partners involved in the implementation of the USNVC include:

U.S. Government
  • Department of Agriculture (USDA)
  • Department of Commerce (DOC)
  • Department of Defense (DOD)
  • Department of the Interior (USDI)
  • Forest Service (FS) - Chair
  • National Agriculture Statistical Service (NASS)
  • Natural Resources Conservation Service (NRCS)
  • National Oceanic and Atmospheric Administration (NOAA)
  • National Marine Fisheries Service (NMFS)
  • U.S. Army Corps of Engineers (USACE)
  • U.S. Navy (NAVY)
  • Bureau of Land Management (BLM)
  • Fish and Wildlife Service (FWS)
  • National Park Service (NPS)
  • U.S. Geological Survey (USGS)
  • Environmental Protection Agency (EPA)
  • National Aeronautics and Space Administration (NASA)
Non U.S. Government
  • NatureServe (NS)
  • Ecological Society of America (ESA)

Disclaimer:
Given the dynamic nature of the standard, it is possible a type description is incomplete or in revision at the time of download; therefore, users of the data should track the date of access and read the revisions section of the USNVC.org website to understand the current status of the classification. While USNVC data have undergone substantial review prior to posting, it is possible that some errors or inaccuracies have remained undetected.

For information on the process used to develop these descriptions see:

Faber-Langendoen, D., T. Keeler-Wolf, D. Meidinger, D. Tart, B. Hoagland, C. Josse, G. Navarro, S. Ponomarenko, J.-P. Saucier, A. Weakley, P. Comer. 2014. EcoVeg: A new approach to vegetation description and classification. Ecological Monographs 84:533-561 (erratum 85:473).

Franklin, S., D. Faber-Langendoen, M. Jennings, T. Keeler-Wolf, O. Loucks, A. McKerrow, R.K. Peet, and D. Roberts. 2012. Building the United States National Vegetation Classification. Annali di Botanica 2: 1-9.

Jennings, M. D., D. Faber-Langendoen, O. L. Louckes, R. K. Peet, and D. Roberts. 2009. Standards for associations and alliances of the U.S. National Vegetation Classification. Ecological Monographs 79(2):173-199.

FGDC [Federal Geographic Data Committee]. 2008. Vegetation Classification Standard, FGDC-STD-005, Version 2. Washington, DC., USA. [http://www.fgdc.gov/standards/projects/FGDC-standards-projects/vegetation/NVCS_V2_FINAL_2008-02.pdf]

For additional information contact:

  • Implementation of the U.S. National Vegetation Classification Standard - Alexa McKerrow (amckerrow@usgs.gov)
  • NatureServe's Development of NVC Type Descriptions - Don Faber-Langendoen (don_faber- langendoen@natureserve.org)
  • Ecological Society of America's Review of the Type Descriptions Scott.Franklin@unco.edu
  • Federal Geographic Data Committee - Vegetation Subcommittee's Activities - Marianne Burke (mburke@fs.fed.us)