senna oligophylla or outback cassia shrub in xeriscaping

xeriscapedhoenix droughttolerant oligophylla xeriscaping australian attractive ornamental evergreen billowing perennial botanical flowering gardening landscape fragrant informal vigorous outdoors outback phoenix arizona vibrant upright rounded brittle foliage blossom natural cassia native desert winter spring floral nature ground gravel senna shrub style green hedge plant woody bloom rocks urban fence warm bush lush grow