Wiegand, RichardSpringer NetherlandsBiodiversity & ConservationKnapp WM, Wiegand R. 2014. Orchid (Orchidaceae) decline in the Catoctin Mountains, Frederick County, Maryland as docu- mented by a long-term dataset. Biodiversity and Conservation 23:1965-1976....
Virginia, on the Potomac River and lies between the Blue Ridge to the east and the Allegheny Mountains to the west. Drained by the Shenandoah River, it embraces nine counties Berkeley and Jefferson in West Virginia and Frederick, Clarke, Shenandoah, Warren, Rockingham, Page, and Augusta in ...