Read this, it's all worth reading but pay attention to section 7:

https://www.wood-database.com/wood-a...ication-guide/

I use a low-power stereo microscope for examining end grain but a 10x hand lens works as well.

You can also send a sample to the govmt for a free ID, details at the bottom of the article or check here: https://www.fpl.fs.fed.us/research/c...dfactsheet.php

JKJ