In recent decades, we have learned that plants are much more like animals in their use of information than earlier thought. They have nervous systems that use glutamate to speed transmission, as mammals do. And seeking to thrive and grow, they communicate extensively. Recently, environmental journalist Richard Schiffman interviewed forest ecologist Suzanne Simard, author of the just-released Finding the Mother Tree on the intelligence of trees: You also found that birches give sugars to fir trees in the summer through the mycorrhizal networks and that firs return the favor by sending food to birches in the spring and fall, when the birches lack leaves. Isn’t that cool? Some scientists were having trouble with this: Why would a tree send photosynthetic…