Alaska designated Sitka Spruce (Picea sitchensis) as the official state tree in 1962. Named for Sitka Sound in Alaska, the Sitka spruce is the tallest conifer in the world. Moist ocean air and summer fog are the main factors that account for Sitka spruce's large growth.

Sitka spruce trees provide good roosting spots for bald eagles and peregrine falcons. Deer, porcupines, elk, bear, rabbits, and hares browse the foliage.

Native to northwest America, Sitka spruce trees are found on the coast from northern California to Alaska. Sitka spruce is also the most important timber tree in Alaska, used for many products including ladders, oars, aircraft components, planking, masts, and sounding boards for musical instruments (pianos, guitars, etc).

Source:

Sitka spruce: Forest and Range.org

Links:

Sitka spruce facts: Auborn University
Sitka spruce facts: Science and Plants for Schools
State Trees - 50 States List