American smoketree (Cotinus obovatus)

[Mr. Peet]

Here are some more photos. There are quite a few little nubs on the sides. Much lighter weight than black Locust, and this wood does not fluoresce under uv light.
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That cleaned portion reminds me of Scholar tree. Your UV black light discounts the locust group. So that helps. However, it also discounts Cotinous....

Inside Wood - Search the Inside Wood Database - Search the Inside Wood Database

insidewood.lib.ncsu.edu

 

[SA-Motors]

Density is 19 lb/ft3, based on a piece 3 x 20.5 x 1.5 This is very dry from being stored at 40% humidity so the moisture content is about 6-8% at most.