A floristic study was conducted between July, 1981 and November, 1982 on a ravine system in an 88-hectare area of Gold Head Branch State Park in southwestern Clay County of northeastern peninsular Florida. There is a dramatic relief of this karst area, sharply contrasting with the surrounding sandhill community. Five plant communities—ruderal, sandhill, xeric oak scrub, streambank, and mixed hardwoods—were distinguished within the study area. A total of 356 species comprising 26 hepatics, 30 mosses, 256 vascular plants, and 44 lichens was collected.