Codominant Stems - Codominant stems are two or more stems which are competing in size and competing for the sun. They do not have branch collars but may form a bark ridge. In many cases this leads to included bark (The Bark Ridge turns in and then cracks can form).
Click here for some pictures.
Click here for more on the topic from the book "A NEW TREE BIOLOGY" by Dr. Shigo.
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