2. Leaves, × 2.
3. Cross-sections of leaves, enlarged.
4-5. Opened cones, × 1.
6. Cone-scale with seeds, × 1.
PINACEAE
Black Spruce
Picea mariana (Mill.) BSP. [Picea nigra Link]
HABIT.—A small tree 20-30 feet high, with a trunk diameter of 6-10 inches; forming a narrow-based, conical, more or less irregular crown of short, slender, horizontal branches; often small and stunted.
LEAVES.—Spirally arranged, spreading in all directions; awl-shaped, 4-sided, blunt at the apex, more or less incurved; stiff; dark blue-green and glaucous; 1/8-3/8 inch long. Persistent for several years.