The Powell River Preserve is a 15-acre natural area located in Claiborne County bordering the Powell River. This small preserve occurs on moist calcareous slopes where wet seeps support large populations of state listed species. The most distinctive communities at the Powell River Preserve are the northern white cedar shrub community and white cedar mixed hardwood community. The shrub community is a discontinuous stand of shrubs and stunted trees that form a dense thicket around the rocky opening. The inside of the cedar stand is dark and the litter layer is of a “mor” type, often characteristic of conifers. Shrubs commonly associated with this rocky area include witch hazel, spicebush, fragrant sumac, and southern black haw. Trees in this community include hackberry, redbud, eastern red cedar, tulip poplar, chinkapin oak, and white cedar. Rare plant species that occur in the seep include shining ladies’-tresses (Spiranthes lucida), maple-leaf alumroot (Heuchera longiflora var. aceroides), and grass-of-parnassus (Parnassia grandifolia), along with more common species like cane, coreopsis, and false rue.
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