Trees of Wisconsin

Key to Gymnosperms of Northeastern Wisconsin

6. Bark of trunk reddish, often forming broad, smooth "plates"; needles snap cleanly when bent double; native species, seldom planted in yards or along streets, although often found in large "plantations" in northern Wisconsin.		Pinus resinosa
6. Bark of trunk dark gray to blackish, fissured and not forming smooth plates; needles do not snap cleanly when bent double; cultivated species in yards primarily.		Pinus nigra