A canker on an eastern black walnut tree. The beetle that carries the fungus causing thousand cankers disease is visible in the canker's upper left corner. (Colorado State University photo/Ned ...
Q: I'm trying to identify the tree in the photo. I've been told that the nuts are not edible. Can you help? - Scott Bundy. A: The tree in the photo is black walnut, Juglans nigra, and it's a ...
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