Locust, the common name for a number of trees and shrubs related to the carob. The black locust of the southern Appalachians is widely grown as an ornamental in the eastern United States and Europe.
Legumes produce their fruit as a pod and generally possess nitrogen-fixing bacteria in nodules on their roots. Because of those bacteria, legumes increase soil's nitrogen content. Some examples of legumes are soybeans, peas and alfalfa.
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