F. scirpoidea was described in 1803 by botanist Andre Michaux1. It is vouchered for most counties in Florida and occurs throughout the southeast United States.
The genus Fuirena was first described in 1773 by Christen Friis Rottbøll, a Danish botanist2. Fuirena is within the tribe Fuireneae which is in the Cyperoideae subfamily and finally within the Cyperaceae family. This means it's more closely related to the Saltmarsh Bulrush (Bolboschoenus robustus) than any other sedge in Florida3.
The FWC and UF/IFAS CAIP have a how-to video for identification. It does not appear to available in cultivation for use in a rain garden, bog, or wetlands restoration4.
References  Michaux, A.M. 1803. Flora boreali-Americana. p.38. link
 Rottbøll, C.F. 1773. Descriptionum et Iconum Rariores. p.70. link
 Simpson, et al. 2007. Phylogeny of Cyperaceae Based on…