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.

Typically grown in the background of a wildflower garden as its tall flower stalks are only visible in fall. The remainder of the year is looks like a moderate-sized grass.

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.

Grow as stands of flowers in moist areas.

Climbs by twining. Train on a fence or arbor, allow to climb trees. Can be used as a groundcover but does not bloom well with that use.

Use as a specimen plant or as an understory in a mixed hardwood forest setting. This tree blooms in early spring before the leaves come out.