Like the trees that produce them, bristlecone needles are long-lived; they last up to 30 or 40 years. While living bristlecone limbs thus carry a heavy load of needles, such a stable needle mass ...

so here's how to identify each specific tree with spiky balls. Reviewed by Sylvia Duax Reviewed by Sylvia Duax You don't have to be a trained arborist to notice that certain trees have unique ...