Three large, self-maintaining, presumably natural populations of Thuja occidentalis, the northern white cedar or arborvitae, were found on shaded north-facing Conococheague limestone cliffs along the Potomac River in Washington Co., Maryland.
Three large, self-maintaining, presumably natural populations of Thuja occidentalis, the northern white cedar or arborvitae, were found on shaded north-facing Conococheague limestone cliffs along the Potomac River in Washington Co., Maryland.