PlantFiles: Purple Cabbage Tree
Cordyline australis 'Purpurea'

This is a relatively common landscape plant, at least here in southern California. It is much touchier than 'regular' cordylines in that it doesn't seem as drought tolerant or as tolerant of muddy clay soils, yet it is still fairly easy to grow. It eventually develops into a tall, often branched, spindly plant with a small crown of brownish leaves. But as a younger plant it is quite ornamental.