The Single-Leaf Pinon (Pinus monophylla) is an aromatic pine tree with short, stiff needles and gnarled branches. The tree grows in coarse, rocky soils and rock crevices. Though its normal height is about 15 feet, the single-leaf pinon can grow as high as 50 feet under ideal conditions.
The Bristlecone Pine (Pinus aristata) shares the state tree designation. The bristlecone pine is the oldest living thing on Earth, with some specimens in Nevada more than 4,000 years of age. The tree can be found at high elevations. Normal height for older trees is about 15 to 30 feet, although some have attained a height of 60 feet. Diameter growth continues throughout the long life of the tree, resulting in massive trunks with a few contorted limbs.