Caroliana scalystem (Elytraria caroliniensis) is a perennial herb found statewide in a variety of moist habitats. It also is found in Georgia and South Carolina. It is a member of the Acanthaceae and, therefore, related to species in Ruellia, Dyschoriste, and Justicia genus. Though many of these are cultivated for home landscapes, Carolina scalystem has not to the best of my knowledge.
This is not an especially showy or robust species. It has a basal rosette of spatulate leaves that measure from 4-6 inches in length and up to about 1/2 inch wide. From this, a 6-8 inch tall flower stem emerges. It has a great many scale-like leaves as it nears the tip and appears almost cone-like. White tubular flowers emerge from beneath these bract-like leaves. They are comprised of 5 petals, fused near the base into a tube, and are about 1/3 inch wide. Flowering can occur during most months between February and November. They are mostly of interest to small butterflies.
Due to its diminutive nature and because its flowers are not especially showy, it is unlikely that Carolina scalystem will be offered by commercial native nurseries associated with FANN - the Florida Association of Native Nurseries. Other members of this family serve as host plants for various butterflies, but Carolina scalystem is not recorded as one. Should you wish to add it to a moist-soil landscape, scatter the small ripe seed on the soil surface and give it some time.