In western Maryland the pattern was pine and chestnut on hilltops, with oak, poplar, maple, and walnut in the valleys; now the mountains and valleys are forested by oaks and other hardwoods (beech, birch, and maple). Maryland is an ecologically diverse state that supports a wide variety ...
Cottonwood, elm, and some oak and walnut are found along the bluffs of eastern Nebraska, while conifers grow in the Wild Cat and Pine Ridge highlands and the Niobrara valley. The Nebraska National Forest in west-central Nebraska resulted from a human effort to plant trees on the barren ...