Gerrard Ardeneum in McAlester, Oklahoma, United States, (sometimes called the McAlester Arboretum in confusion with an arboretum of this name in Missouri) was established 1990 as combination of an arboretum and a museum with landscaped gardens and historical artifacts. It is located at 501 North 5th Street.

• List of botanical gardens and arboretums in Oklahoma

• City of McAlester - information under Visitors, Area Attractions Archived 2015-06-24 at the Wayback Machine
• Information
• Garrard Ardeneum - YouTube tour in 2003, "Oklahoma Gardening host Steven Owens visits the Garrard Ardeneum in McAlester"

34°55′59″N 95°45′59″W / 34.93306°N 95.76639°W / 34.93306; -95.76639