- a) Douglas fir
The tree is characterized by smooth gray bark that has resin blisters on young trees, and when they are mature enough, they are thick and deeply furrowed with broad and usually corky ridges. Their leaves are evergreen needles that are approximately one inch long with bracts at the base. It has a height of 100 to 130 feet and an elevation of 6000 to 9500 feet. Its relation to fire is a bit thin as the resinous bark of young trees makes them highly susceptible to fire because, after forty years, the tree has grown a thick layer of bark to protect them during a surface fire and hot ground.
- b) Lodgepole pines-
The tree’s bark is light brown and thin but has a lot of small scales, while its leaves are needles that always green with a length of about one to three inches. The leaves are also sharply pointed, slightly flattened, stiff, often twisted, stout, and there are two needles in each bundle. Its fruit is shiny, yellow-brown, serotinous cones and shaped like an egg as they are two inches long with raise, round cone scales with a tiny point. It is about 20 to 80 feet, and its seeds are often released from cones by exposure to extreme heat. Due to its thick back, ground fires kill many trees of the same, but new trees sprout out when cones open and release seeds. They are found at elevations between 6,000-11,000 feet.
c)Narrowleaf cottonwood-
The trees have smooth and yellow-green bark when they are young but furrowed with interlacing ridges that are gray-brown during its maturity. It has got an elevation of 5000 to 8000 feet and a height of up to sixty feet. The tree’s leaves are broad, with green shiny leaf foliage and a pale underside. Severe fires can easily lead to the death of both young and mature spices, but after the fire, the young trees are able to sprout from roots and branches.