Yucca luminosa
Yucca luminosa, more commonly referred to as its synonym Yucca rigida, is a plant species in the yucca genus native to northern Mexico. It is also commonly called silver-leaf yucca, blue yucca, and rigid blue yucca. It grows in ravines of stony soil and limestone scrubland at elevations of  above sea level. Yucca luminosa usually grows individual or branched  tall trunks, with a crown of powdery blue leaves that grow to  long and narrowly lanceolate, tapering at both ends. It forms  tall inflorescences with white flowers. References

  

luminosa
Plants described in 1902
Flora of Durango
Flora of Chihuahua (state)
Flora of Coahuila