The Genus Picea
Engelmann Spruce: Picea engelmannii - Needles 4-angled, about as wide as thick and measuring about 2.5 cm long. Whitish stomatal lines on all surfaces. Female cones about 4-5 cm long. Common above 3000' on the mountain.Sitka Spruce: Picea sitchensis - Needles flatter, about twice as wide as thick and measuring 1-1.5 cm long. Whitish stomatal lines on the upper leaf. Female cones about 6-10 cm long. At this point, only seen on moist ground on the lower south slopes of Mt. Adams.