Xanthorrhoea
Xanthorrhoea, also called Blackboy and Grass Tree, a group of about 14 species of long-lived desert plants native to Australia and New Zealand. The plants have stout woody stems that attain heights up to 15 feet (4.6 m) in some species. A tuft of long, grasslike leaves grows from the top of the stem. From the center of the leaves rises a long cylindrical spike crowded with small, greenish flowers. A reddish yellow gum that oozes from the stem has been used to treat diarrhea and in varnishes.
Xanthorrhoea is a genus of the lily family, Liliaceae. The common blackboy is X. hastilis.