Weak V-shaped attachment of tree stems

Stems attached like a V shape may split apart more easily

Copyright M. D. Vaden: 2010

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When tree stems meet at a V shape, the union is typically a lot weaker than when branches or stems form a U shape.

The V shape unions typically get weaker because little wood tissue, if any, can form between. Then the bark gets trapped in the middle and the living tissue there just ends up dying.

U shape unions allow for more wood growth over an extended period of time.

The stems meeting at a V are often referred to as codominant leaders. Branches can form V unions too. Sometimes 3 or more leaders can meet together at one union, and that is even worse yet.

Ideally, it's a good idea to prune-away one of the two stems when the tree is young. That way the cut will be smaller.

In this video, you will see a maple which went without the proper corrective pruning for many years. And the V unions exist in multiples This example does not show pruning technique, but rather what the problem looks like and why it needs to be corrected.

Correction can involve hand pruners, handsaws, chainsaws, and even chisels. At least for removal of one stem. If the weakness is not corrected and grows bigger for years. Bracing or complete eradication may be options to consider.