Xanthorrhea

This Australian native thrives on serpentenite rock, geolgy that is derived from the depths of an oceanic trench. When the eastern edge of the Australian continental Plate was riding over the sub-ducting Pacific Plate, material from the deeper underlying crust was squeezed into the trench along with the accumulating material from the abrading of the two plates. Later in a mountain-building period this deep material has been folded and u[lifted to form an accretion on the edge of the continent. Presumably this plant loves the magnesium rich soils derived from the lower earth's crust.