CLARK, DIANNE JOHNSTON, 58, of North Canoe Creek Road, Kenansville, died Thursday of lung cancer. A member of a pioneer Osceola County family, she was born in Kissimmee, the daughter of Pat Johnston, Jr. and Katherine Lowe Small and was a lifelong Osceola County resident. Mrs. Clark was the co-owner of the Bar Seven Ranch in Kenansville and was a Protestant. She was over a thirty year member of the Silver Spurs Club and had for many years participated in many rodeos as a member of the Quadrille (square dance on horseback) and was also a member of the Osceola County Trail Ride Association and served as a community advisor on the Farm Service Agency Committee. Survivors include husband, John S. Clark; son, Slade Clark, Kenansville; mother, Katherine L. Small, St. Cloud; sister, Kathy Pope, Loudin, Tn.; brother, Delmar Reed Small, Gainesville. Graveside funeral services will be held at 11AM, Monday, in Osceola Memory Gardens Cemetery (old section) with Rev. Bryce Foulke, officiating. Friends may call Sunday 6-8PM, at Grissom Funeral Home for signing the register only. Honorary casketbearers will be all her friends. In lieu of flowers, the family respectfully requests contributions to Green Isle Childrens' Ranch, P. O. Box 121400, Clermont, FL 34712. Grissom Funeral Home and Crematory, Kissimmee is in charge of arrangements. (407)847-3131.