Shirley Jacobson, 66, a longtime Lansing resident, died Friday of cancer in Americana Nursing Home, South Holland. Mrs. Jacobson, who was born in Albany, N.Y., graduated from South Shore High School. She then worked at Clemensen`s Florists, a 100-year-old family business, until she retired in 1986. Mrs. Jacobson lived in Lansing for 13 years. She is survived by her husband, John; a daughter, Susan Tsytee; a son, Robert; a sister; and two grandchildren. Visitation will be from 2 to 9 p.m. Monday in the Schroeder-Lauer Funeral Home, 3227 Ridge Rd., Lansing. Services will be at 11 a.m. Tuesday at the funeral home.