Is there a herb or plant called “Locust” apart from the typical grasshopper or locust?

The food of John the Baptist was locust and wild honey.

“And the same John had his raiment of camel’s hair, and a leathern girdle about his loins; and his meat was locusts and wild honey.” (Matthew 3:4, KJV 1900)

Is there any herb or vegetable that might possibly be the locusts of the verse quoted? Are there any biblical or extra biblical sources that talk about this?

I am looking specifically for any evidence that may point that the locust is a herb or shrub and not an insect!