The Japanese black pine (Pinus thunbergii ) usually grow to heights of 20 to 40 feet and is crooked in its stance. It has loosely spreading branches and blackish-gray bark furrowed in irregular plates. In Japan, this tree is often pruned into beautiful shapes and is a popular bonsai tree. The foliage consists of sharp-pointed needles 3 to 5 inches long which are packaged in clusters of two. Male and female cones appear on the same tree: male cones are yellowish and form at the base of new growth and female cones are purple-red. The tree is a native of northeast China, Japan and Korea. Salt tolerance makes it an excellent tree for the shore and for stabilizing sand dunes.