NVCS

A3374 Impatiens capensis - Symplocarpus foetidus - Caltha palustris Seep Alliance

Type Concept Sentence: These are circumneutral or slightly calcareous groundwater seeps typically dominated by forbs, including Angelica atropurpurea, Caltha palustris, Impatiens capensis, and Symplocarpus foetidus, and found throughout the Central Appalachian, northeastern and north-central United States and eastern temperate Canada.

Common (Translated Scientific) Name: Orange Jewelweed - Skunk-cabbage - Yellow Marsh-marigold Seep Alliance

Colloquial Name: Central Appalachian-Northeast Calcareous Seep

Hierarchy Level: Alliance

Type Concept: These circumneutral or slightly calcareous groundwater seeps are typically dominated by forbs, including Angelica atropurpurea, Caltha palustris, Impatiens capensis, and Symplocarpus foetidus. Other species that may be found include Carex lacustris, Carex stricta, Glyceria striata, and Thelypteris palustris. This type is found throughout the Central Appalachian, northeastern and north-central United States and eastern temperate Canada. Stands are found on lower slopes of glacial moraines, ravines, and terraces around seepage areas, where circumneutral or slightly calcareous groundwater seeps to the surface. Peat sometimes accumulates to a depth of 1 m. Other sites have little organic material, with groundwater typically welling up through carbonate-encrusted gravel.

Diagnostic Characteristics: This alliance contains vegetation of circumneutral or slightly calcareous groundwater seeps from the Central Appalachians north through the mid-Atlantic states to New England. The criteria for distinguishing it from other alliances include floristic as well as biogeographic ones.

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: Examples occur as inclusions within other, usually forested, vegetation. As currently defined, this alliance includes only those sites dominated by herbaceous species. Sites that are floristically very similar but occur under a tree canopy are treated as forested seeps and swamps.

Similar NVC Types: No Data Available

note: No Data Available

Physiognomy and Structure: This alliance is dominated by forbs.

Floristics: This alliance is dominated by forbs; Angelica atropurpurea, Caltha palustris, Impatiens capensis, and Symplocarpus foetidus are usual dominants. Other species that may be found include Carex lacustris, Carex stricta, Glyceria striata, and Thelypteris palustris. Shrubs and trees from surrounding vegetation types sometimes occur. Typical woody species include Acer rubrum, Fraxinus nigra, and Thuja occidentalis, which may occur at low cover.

Dynamics: No Data Available

Environmental Description: Stands are found on lower slopes of glacial moraines, ravines, and terraces around seepage areas, where circumneutral or slightly calcareous groundwater seeps to the surface. Peat sometimes accumulates to a depth of 1 m. Other sites have little organic material, with groundwater typically welling up through carbonate-encrusted gravel.

Geographic Range: This type is found throughout the Central Appalachian, northeastern and north-central United States and eastern temperate Canada.

Nations: CA,US

States/Provinces: CT, DC, IA, IL, IN, MA, MD?, ME, MI, MN, NB?, NH, NJ, NY, OH, ON, PA, QC?, RI, VA, VT, WI, WV

Plot Analysis Summary: http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.899498

Confidence Level: Low

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available

Type	Name	Database Code	Classification Code
Class	2 Shrub & Herb Vegetation Class	C02	2
Subclass	2.C Shrub & Herb Wetland Subclass	S44	2.C
Formation	2.C.4 Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland Formation	F013	2.C.4
Division	2.C.4.Nd Eastern North American Temperate Freshwater Marsh, Wet Meadow & Shrubland Division	D323	2.C.4.Nd
Macrogroup	2.C.4.Nd.1 Shrubby-cinquefoil - Canadian Burnet / Inland Sedge Seep Macrogroup	M061	2.C.4.Nd.1
Group	2.C.4.Nd.1.c Tawny Cottongrass - Jewelweed species - Skunk-cabbage Seep Group	G189	2.C.4.Nd.1.c
Alliance	A3374 Orange Jewelweed - Skunk-cabbage - Yellow Marsh-marigold Seep Alliance	A3374	2.C.4.Nd.1.c
Association	CEGL002385 Skunk-cabbage - Mixed Forbs Seep	CEGL002385	2.C.4.Nd.1.c
Association	CEGL006258 Yellow Marsh-marigold - Orange Jewelweed - Marsh Blue Violet Seepage Meadow	CEGL006258	2.C.4.Nd.1.c
Association	CEGL006448 New York Ironweed - Eastern Marsh Fern - Skunk-cabbage Seepage Meadow	CEGL006448	2.C.4.Nd.1.c

Concept Lineage: Four of five members of the old A.1694 (all of the eastern ones).

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: No Data Available

Concept Author(s): M. Pyne, in Faber-Langendoen et al. (2013)

Author of Description: M. Pyne and D. Faber-Langendoen

Acknowledgements: No Data Available

Version Date: 12-18-14

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. 2013-2019b. Screening alliances for induction into the U.S. National Vegetation Classification: Part 1 - Alliance concept review. NatureServe, Arlington, VA.
Faber-Langendoen, D., and Midwest State Natural Heritage Program Ecologists. 1996. Terrestrial vegetation of the midwest United States. International classification of ecological communities: Terrestrial vegetation of the United States. The Nature Conservancy, Arlington, VA.
MNNHP [Minnesota Natural Heritage Program]. 1993. Minnesota''s native vegetation: A key to natural communities. Version 1.5. Minnesota Department of Natural Resources, Natural Heritage Program, St. Paul, MN. 110 pp.