Broadleaf White-topped Sedge, a native species, has been added to the USWildflowers database (01/20/2019.) Scientific name is Rhynchospora latifolia. Photo below was taken in Bradford County, FL on April 10, 2018. Go to the Broadleaf White-topped Sedge detail page for more information and photos.
Broadleaf White-topped Sedge – Rhynchospora latifolia