Alice Springs ancient Australia brown bush central Australia desert-country desert-region dry height high hill hills historic hot inland mountainous mountains outback ridge rocks rocky rough rugged scrub shrubbery sunlight sunshine terrain textures trees allocasuarina allocasuarina-decaisneana angiosperm arid Australian-pine branchlets Casuarina conifer-like desert-oak distinctive evergreen feathery-foliage foliage green hardy leaf leaves medium-sized tree native she-oak sheoak tiny-scales tree vegetation whorls gully native-palm palm palm-tree shrubs