information:filtering
Flora

Forests cover approximately 95 percent of the Great Smoky Mountains National Park. The lower region forests are dominated by deciduous leafy trees. At higher altitudes, deciduous forests give way to coniferous trees like Fraser fir. An estimated 20 to 25 percent of the forests in the park are estimated to be old-growth forest, with many trees that predate European settlement of the area. This is one of the largest blocks of deciduous, temperate, old growth forest in North America. Most of the forest is a mature second-growth hardwood forest. The variety of elevations, the abundant rainfall, and the presence of old growth forests give the park an unusual richness of biota. The park is home to over 1,500 species of flowering plants, more than in any other national park in North America. These include 35 kinds of delicate orchids, 27 violets, and 58 members of the lily family. The park contains 101 species of native trees and 114 species of native shrubs. The park also contains over 490 species of non-vascular plants. More than 4,000 species of non-flowering plants, 2,700 fungi, 952 algae, and 563 lichen species are found in the park. Plants and animals common in the country's Northeast have found suitable ecological niches in the park's higher elevations, while southern species find homes in the balmier lower reaches.

The forests of the Smokies are typically divided into three zones—The cove hardwood forests in the stream valleys, coves, and lower mountain slopes; the northern hardwood forests on the higher mountain slopes; and the spruce-fir or boreal forest at the very highest elevations. Appalachian balds —patches of land where trees are unexpectedly absent or sparse—are interspersed through the mid-to-upper elevations in the range. Balds include grassy balds and heath balds. Heath balds are covered mostly in shrubbery that is part of the heath family such as rhododendron and mountain laurel. They are primarily found in the northeastern part of the park on narrow ridges at elevations between 3,600 and 5,200 feet (1,100 and 1,600 m). Grass balds are mountaintop meadows that are mostly covered in grasses and sedges. They are typically found on rounded mountaintops or slopes in the southwestern part of the park at elevations ranging from 4,500 to 5,700 feet (1,400 to 1,700 m). Mixed oak-pine forests are found on dry ridges, especially on the south-facing North Carolina side of the range.