Spinifex

n.	1.	(Bot.) A genus of chiefly Australian grasses, the seeds of which bear an elastic spine. Spinifex hirsutus (black grass) and Spinifex longifolius are useful as sand binders. Spinifex paradoxusis a valuable perennial fodder plant. Also, a plant of this genus.
	2.	Any of several Australian grasses of the genus Tricuspis, which often form dense, almost impassable growth, their leaves being stiff and sharp-pointed.