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Impatiens (capensis, pallida) - Heuchera villosa - (Saxifraga virginiensis, Cardamine diphylla) Herbaceous Vegetation | Southeastern Ecology Working Gro...
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Name: Impatiens (capensis, pallida) - Heuchera villosa - (Saxifraga virginiensis, Cardamine diphylla) Herbaceous Vegetation
Reference: Southeastern Ecology Working Gro...
Description: This association includes forb-dominated seepage vegetation from low to moderate elevations (about 300-400 m or 1000-1300 feet msl) in the Interior Low Plateau, Highland Rim Section. Examples are found on saturated sloping to concave to near vertical exposures of gray calcareous mudstones and/or siltstones of the Fort Payne formation. These exposures vary greatly in size, from about 10 to perhaps 50 square meters. The seeps occur where blocky limestones with vertical fissures and joints overlie more flatly bedded strata. Herbs observed include Impatiens capensis, Impatiens pallida, Heuchera villosa, Saxifraga virginiensis, Dodecatheon meadia, Cardamine diphylla, Polymnia canadensis, and Thaspium pinnatifidum (sensu lato). They are primarily herbaceous systems, but may be ringed by shrubs. Hydrangea arborescens is invariably present and often dominant in this marginal shrub zone; other shrubs present include Staphylea trifolia and Hypericum prolificum. Sheltered areas under rock overhangs or boulders may harbor thallose liverworts and various mosses including Mnium sp. This distinctive vegetation is maintained by seepage from the siltstones; this seepage and the steep irregular topography do not allow trees to take hold and dominate the community. In a sparsely vegetated variant on near-vertical, gently concave exposures of gray siltstone talus of the Fort Payne, Polymnia canadensis and Heuchera villosa dominate; also present in this variant are Pellaea atropurpurea, Monarda fistulosa, and Packera obovata (= Senecio obovatus). 
Accession Code: VB.CC.23846.IMPATIENSCAPENS
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 01-Apr-1997 to: 17-Nov-2014
      Names:   Translated: (Orange Jewelweed, Yellow Jewelweed) - Rock Alumroot - (Early Saxifrage, Crinkleroot Toothwort) Herbaceous Vegetation
  UID: ELEMENT_GLOBAL.2.686752 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL004708
  Scientific: Impatiens (capensis, pallida) - Heuchera villosa - (Saxifraga virginiensis, Cardamine diphylla) Herbaceous Vegetation
  Common: Highland Rim Limestone Cliff/Talus Seep
(convergence) and Synonyms:
(undetermined) Hydrangea arborescens / Impatiens (capensis, pallida) - Heuchera villosa Shrubland