ENH-1104, a 7-page illustrated fact sheet by Jeffrey G. Norcini, Anne L. Frances, Carrie Reinhardt Adams, provides recommendations for establishing this upright wildflower with showy yellow petals and brownish center that occurs almost exclusively in Florida, including ecotypes, site selection, site preparation, sowing seeds, establishment and maintenance. Includes references. Published by the UF Department of Environmental Horticulture, April 2009.
http://edis.ifas.ufl.edu/EP368