I have two trees in my front yard that produce what I call "pods".

One produces large wide pods, they can be up to 9 inches long, and one
produces small thin pods, they can be up to 5 inches long.

How can I tell if the trees are honey mesquite or honey locust?

I live in the Midland/Odessa area of west Texas and the trees are
volunteers, they were not planted. They are about 40 years old and are,
I don't know, 20 feet tall? How does one measure a tree's height?
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JD..