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These checklists and distributions are based on the following publications:

• Philip Keenan's Wild Orchids Across North America
• North American Native Orchids (NANO) Journal
• Carlyle Luer's The Native Orchids of Florida
• Carlyle Luer's The Native Orchids of the U.S. and Canada Excluding Florida
• D.S. Correl's Native Orchids of N.A. North of Mexico
• Williams' Field Guide to Orchids of North America.
• Paul Martin Brown (et. al.) Wild Orchids of Florida: With References to the Gulf and Atlantic Coastal
  Plain. A field-guide type reference to orchids of the Southeastern United States.