Trees of Wisconsin
Key to Gymnosperms of Northeastern Wisconsin
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18a. Cones usually longer than 5 cm, scales papery, with erose tips and appearing wrinkled longitudinally. A horticultural species of yards, never escaping. |
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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. |   |
Picea
glauca (White Spruce) |