Polygala smallii is endemic to east-central Florida from southern St. Lucie County through Miami-Dade County. Only 11 documented populations are documented to occur, all of which are found within 10 km (6.2 miles) of the Atlantic coast. Seven of the existing populations currently occur on managed public lands (USFWS 1999). Historically, the northernmost extent of the range was believed to be Broward County, but more recent survey efforts have extended the range into southern St. Lucie county. Polygala smallii may have occurred as far north as Brevard County, but this is uncertain, as the only evidence is a single specimen collected in 1874 labeled "Indian River" (USFWS 1999). Within India River Lagoon Counties, Polygala smallii occurs within 10 km (6.2 miles) of the coast in Palm Beach, Martin and southern St. Lucie Counties (USFWS 1999).
- Gann, G. and K. Bradley. 1995. Endangered species status survey: Polygala smallii Smith and Ward. Tiny Polygala. U.S. Fish and Wildlife Service, Jacksonville, Florida.
- Kral, R. 1983. A report on some rare, threatened or endangered forest-related vascular plants of the South. USDA Forest Service, Technical Publication R8-TP2. 1305 pp.
- Menges, E.S., and D.R.Gordon. 1996. Three levels of monitoring intensity for rare plant species. Natural Areas Journal 16:227-237.
- Miami-Dade County Department of Environmental Resource Management. 1994. Annual Report.Endangered pine rockland plant species recovery project.Unpublished report prepared for the U.S. Fish and WildlifeService, Jacksonville, Florida.
- Peroni, P.A. and W.G. Abrahamson. 1985. A rapid method for determining losses of native vegetation. Natural Areas Journal 5: 20-24.
- U.S. Fish and Wildlife Service(USFWS). 1996. Recovery plan for nineteen Florida scrub and high pineland species (Revised). U.S. Fish and Wildlife Service; Atlanta, GA.
- U.S. Fish and Wildlife Service(USFWS). 1999. South Florida multi-speciesrecovery plan. Atlanta, GA. 2,172 pp.
- Wunderlin, R.P. 1982. Guide to the Vascular Flora of Central Florida. University Presses of Florida, Gainesville. 472 pp.
- Zomlefer, W. 1991. Flower Plants of Florida, a Guide to Common Families. Biological Illustration, Inc. Gainesville, Florida.