Fred Eugene Hornaday, 85, a retired executive vice president of the American Forestry Association and a former president of the Cosmos Club, died at Suburban Hospital Aug. 31 following a heart attack.

Mr. Hornaday, who lived in Rockville, was born in Indianapolis. He grew up in Washington and graduated from the old Central High School. He also graduated from the Wharton School of the University of Pennsylvania.

As a young man, he worked briefly for the U.S. Chamber of Commerce, the old United States Daily and U.S. News and World Report.

He joined the American Forestry Association in 1928 as its business manager. He was named executive vice president in the late 1950s and retired in 1968.

He received the forestry association's John Aston Warner Medal for Distinguished Service.

Mr. Hornaday was a director of the Rotary Club of Washington, an elder of the Chevy Chase Presbyterian Church, a chairman of the Natural Resources Council of America, and a member of the conservation committee of the National Council of the Boy Scouts of America and the national advisory council of the Committee to Keep America Beautiful.

Survivors include his wife, Annie Claire Hornaday of Rockville; two children, Fred of Simsbury, Conn., and Richard of Reston; a brother, James of Swarthmore, Pa., and five grandchildren.