The Mohave Yucca here are quite large as I look SW.

Mojave yucca can be arborescent or shrublike, with single or clumped erect stem. This highly variable, long-lived, slow-growing species is simple-stemmed or sparingly branched, with the first branches occurring a few feet off the ground. Mojave yucca generally grows from 9.2 to 14.8 feet tall, although specimens as tall as 30 feet have been reported. Individual plants may live for hundreds of years.