See here the tree whereby I heard the xylem pops. The wind rustled the branches and the pops’ pace quickened. I swear the daffodil head in my shirt perked up.
Xylem and phloem are the vein and arterial systems of trees. The smooth part you can see on this red gum is where my ear pressed and I could hear the sounds of the tree sap moving. One of the more amazing interactions I have had with nature…who knew?!