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Trees of Wisconsin

Key to Gymnosperms of Northeastern Wisconsin

18a. Cones usually longer than 5 cm, scales papery, with erose tips and appearing wrinkled longitudinally. A horticultural species of yards, never escaping.

 Colorado Blue Spruce Colorado Blue Spruce Picea pungens
(Colorado blue Spruce)
18b. Cones usually 5 cm or less in length; scales stiff and lacking erose tips and wrinkles. A native species, mostly northern, occasionally planted as a horticultural tree. White SpruceWhite Spruce Picea glauca
(White Spruce)