Yucca glauca (Yucca, Spanish Bayonet)
Yucca glauca, which has slender leaves, is found in dry conditions, along Magnolia and around Gross Reservoir. A fatter cousin, Yucca baccata, lives in drier, hotter locations throughout the Southwest.
The globe-shaped flowers are the focus of a symbiotic relationship with three species of moth. For more information please go to https://en.wikipedia.org/wiki/Prodoxidae.