Robinia pseudoacacia;

Also known as Robinia or False Acacia. Black Locust can be a pale golden or greenish yellow to a medium warm russet brown. This wood is very durable to rot or decay and is frequently used for fence-posts, flag poles, and indoor and outdoor furniture. This very hard wood can be dulling to your blades, but turns nicely on a lathe and glues and finishes well. This wood is very fluorescent.