What is "spinifex longifolius"

Spinifex \Spin"i*fex\, n. [NL.; L. spina spine + facere to make.]

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.

Spinifex longifolius, commonly known as beach spinifex, is a perennial grass that grows in sandy regions along the seacoast. It also lives in most deserts around Australia.