Lady Fern – Athyrium filix-femina

Jayhawk may refer to:

Jayhawker, originally a term for Free State or Union partisans during the Bleeding Kansas period and subsequently the United States Civil War, later applied generally to residents of Kansas
Jayhawk (mascot), the mascot of many schools and their sports teams, derived from the term Jayhawker
- Kansas Jayhawks, teams of the University of Kansas
- Head-Royce School, Oakland, California
- Urbandale High School, Urbandale, Iowa
- Jayhawk-Linn Junior-Senior High School near Mound City, Kansas
- Vandercook Lake High School, Jackson, Michigan
- Muskegon Community College, Muskegon, Michigan
- Jamestown Community College, Jamestown, New York
- Jefferson Central School, Jefferson, New York
- Jericho High School in Jericho, New York
- Jeannette City School District in Jeannette, Pennsylvania
- St. Joseph Catholic High School (Ogden, Utah)

Vehicles

Beechcraft AQM-37 Jayhawk, supersonic target drone produced by Raytheon for the US Navy
Raytheon T-1 Jayhawk, twin-engine jet trainer used by the US Air Force
Sikorsky MH-60 Jayhawk, US Coast Guard medium range recovery helicopter