A second subspecies, Amorpha herbacea subsp. crenulata is Endemic to Dade County.  Considered to by Endangered by the State of Florida and by the USFWS. Can be used as a specimen plant in a sunny spot or as a moderately tall wildflower.

This species is almost always coastal occupying only a strip along the coastline and not entire counties. Wildflower garden or tall-growing groundcover. Forms mounds that are typically wider than tall. Cut back to ground after flowering.