The City Commission agreed Thursday to extend a temporary bus service that connects downtown with Clearwater Beach. The current service had been scheduled to expire June 30; commissioners have extended the service through September. It is the second extension given to the program. Commissioners said they have extended the service to give officials time to work out possible arrangements for permanent service. Service is operated by the Pinellas Suncoast Transit Authority, and the city pays $10,700 a month to cover costs. In other business, commissioners adopted the hibiscus as the city flower and the live oak as the city tree. The plan calls for the city's nursery to use the species in landscaping projects.