Rockrose, totally unrelated to the actual rose, is a small shrub native to the Mediterranean with flowers that look a bit like wild roses. In addition to the flowers, the sticky leaves of this plant exude a sweet smell which is reminiscent of sycamores in the rain. These plants are supposedly tolerant of drought, salt, etc, but i've had lots die seemingly randomly after growing fine for a few years. I suspect their roots are subject to disease. Nevertheless, they are good for mediterranean climate areas and worth a try, especially if you live in a fire-prone area - they are quite fire resistant.