Name:
Juniperus virginiana / Dasiphora fruticosa / Carex flava - Carex tetanica Fen
Reference:
NatureServe Biotics 2019
Description:
This association is a saturated wetland of turfy mineral soil occurring over calcareous bedrock, a fen supporting a number of calciphitic species. It occurs in New York, New Jersey and Pennsylvania. It varies in appearance from an open shrubland to open herbaceous vegetation. The tall-shrub layer, when present, is 2-5 m in height with 20% cover or less. Typical tall shrubs include <i>Cornus amomum, Juniperus virginiana</i>, and <i>Toxicodendron vernix</i>. Typical short shrubs include <i>Dasiphora fruticosa ssp. floribunda, Spiraea tomentosa, Spiraea alba var. latifolia</i>, and <i>Lyonia ligustrina</i>. Other characteristic, often calciphilic, shrubs include <i>Salix candida</i> and <i>Salix discolor</i>. Invasive shrubs may be locally abundant in some fens, especially <i>Rosa multiflora</i> and <i>Elaeagnus umbellata</i>. The herbaceous layer is greater than 75% cover (often near 100%). Dominant herb species include <i>Packera aurea, Parnassia glauca, Thelypteris palustris, Pycnanthemum tenuifolium, Onoclea sensibilis, Juncus subcaudatus, Solidago rugosa, Carex stricta, Dryopteris cristata</i>, and <i>Juncus dudleyi</i>. Other associates include <i>Juncus nodosus, Equisetum fluviatile, Sisyrinchium angustifolium, Solidago uliginosa, Eupatorium maculatum, Liatris spicata, Spiranthes lucida, Rudbeckia fulgida, Pedicularis canadensis</i>, and <i>Pedicularis lanceolata</i>. A number of calciphilic herb species are often present at low cover values, including <i>Lobelia kalmii, Epilobium strictum, Carex tetanica, Carex flava, Juncus brachycephalus, Bromus kalmii, Cypripedium parviflorum, Geum rivale</i>, and <i>Castilleja coccinea</i>. <i>Lythrum salicaria</i> can be an abundant weed species in some fens. This vegetation has been generally affected by grazing in the past, which in some cases continues to the present, and as such this vegetation is known locally as a pasture fen.
Accession Code:
urn:lsid:vegbank.org:commConcept:35002-{B5FD1778-444D-44ED-BBE6-1630A22A4980}
Plot-observations of this Community Concept:
14
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