Spanish bayonet

GNU Webster's 1913

1. adj. (Bot.) a liliaceous plant (Yucca alorifolia) with rigid spine-tipped leaves. The name is also applied to other similar plants of the Southwestern United States and mexico. Called also Spanish daggers.

WordNet 3.0

1. n. tall yucca of the southwestern United States and Mexico having a woody stem and stiff swordlike pointed leaves and a large cluster of white flowers
2. n. a stiff yucca with a short trunk; found in the southern United States and tropical America; has rigid spine-tipped leaves and clusters of white flowers