Name:
Saccharum baldwinii - Calamagrostis coarctata - Panicum rigidulum - Rhynchospora capitellata Herbaceous Vegetation
Reference:
Southeastern Ecology Working Gro...
Description:
This association is found in depression ponds which have a pronounced seasonal fluctuation in water level, filling in the winter and often drying completely in the summer. It occurs as the upper/outer parts of a zonation sequence, dominated at least in part by the nominal species, found in upland depressions of the Interior Low Plateau (southeastern Highland Rim) of Tennessee. In these situations, water is ponded by an impermeable fragipan in the substrate. Saccharum baldwinii may be present in patches; other taller stature species present may include Calamagrostis coarctata and Andropogon virginicus. Medium- to short-stature graminoids (which may form a more-or-less distinct zone in some cases) include Panicum rigidulum var. rigidulum, Panicum verrucosum, Dichanthelium dichotomum, Juncus effusus, Carex bullata, Dichanthelium dichotomum, Rhynchospora glomerata, and Rhynchospora capitellata. Additional herbs present may include Ludwigia linearis, Juncus acuminatus, Juncus dichotomus, Juncus marginatus, Juncus scirpoides, Xyris torta, Rhexia mariana, and Lobelia canbyi. The mosses Polytrichum commune, Sphagnum spp., and others are patch dominants. In one disturbed example, the dominant grasses are Saccharum baldwinii and Dichanthelium dichotomum; other grasses which are present here include Chasmanthium laxum, Panicum anceps, Sorghastrum nutans, Calamagrostis coarctata, Aristida longispica, Schizachyrium scoparium, Dichanthelium scoparium, and Andropogon virginicus. Forbs are less prominent but include Symphyotrichum dumosum (= Aster dumosus), Helianthus angustifolius, and Rhexia mariana. Smilax rotundifolia is a common vine. Another disturbed, successional example is dominated by Panicum rigidulum var. rigidulum and Hypericum drummondii, with Dichanthelium dichotomum var. dichotomum (= Dichanthelium dichotomum var. ramulosum), Packera anonyma (= Senecio anonymus), Eryngium yuccifolium, Symphyotrichum dumosum, Liatris spicata, Liatris microcephala, Polytrichum commune, Coreopsis tripteris, Parthenium integrifolium, Agalinis sp., Symphyotrichum spp. (= Aster spp.), Solidago spp., and Diodia teres. This vegetation may grade down into that of the V.A.5.N.k Juncus repens - Eleocharis microcarpa Seasonally Flooded Herbaceous Alliance (A.1376), and some species more typical of this alliance may be present, including Eleocharis microcarpa, Juncus repens, Proserpinaca pectinata, and/or Proserpinaca intermedia.
Accession Code:
VB.CC.24314.SACCHARUMBALDWI
Plot-observations of this Community Concept:
0
|
