The white ash (Fraxinus Americana) is a native tree growing 60- t0 100-feet tall. It is a popular street tree in the urban landscape. The trunk is long, straight and free of branches for most of its height. The bark is ash-gray and furrowed into a braided or diamond-shaped pattern. The compound leaves typically have seven ovate leaflets, six opposite each other with one at the end on short-stemmed stalks. The leaves are dark green and smooth above, whitish below. The wood is white, hard, strong and elastic. It is used for flooring, furniture, and most famously, baseball bats. Currently, the emerald ash borer, a green beetle native to Asia and accidentally imported into the United States, threatens to kill the entire North American ash genus. The ash trees in Marquand Park are injected with an insecticide to protect the trees.