Plum puzzle

Native Tree Society Tree Measuring Guidelines and related materials.

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Will Blozan
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Plum puzzle

Post by Will Blozan » Mon Nov 17, 2014 9:27 am


Ok, here is another one. American plum (Prunus americana) is a diminutive tree. It tends to have a single stem but often forks below 4.5 feet as small trees do. So, do we take the girth at the smallest, lowest point or stick to 4.5 feet?

To me, 4.5 feet short changes the little trees as it bypasses significant trunk mass. This would be especially important on low-branching species such as evergreen rhododendrons, mountain laurel, witch-hazel etc.

Adding to the tree puzzle below is the right stem is dead. Do we still measure at lowest point?

Pruname base.jpg
Pith trace
Pith trace pruname.jpg

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Re: Plum puzzle

Post by bbeduhn » Mon Nov 17, 2014 10:17 am

The low branch, whether dead or alive, still adds to the girth differently than it would to a standard single trunk tree. Therefore, the true girth should still be the smallest point on the trunk below 4.5', regardless of the branch being dead or 4 cents (inflation).

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Re: Plum puzzle

Post by edfrank » Mon Nov 17, 2014 10:39 am


am unsure about your pith trace but am willing to accpet it as a single trunk tree. I would include the girth of the dead branch but measure teh girth at the narrowest point below the branch and note the heihgt, even if it were at ground level.

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