It could go with my observation of a couple of days ago but, it is a different day, same plant, and I just wanted to show the inside of one of the flowers.
What I thought was a Hesperoyucca whipplei turned out to be a Yucca schidigera.
They were in a group of 4 plants. Some budding, some had bloomed.
The Mojave yucca (Yucca schidigera), also known as the Spanish Dagger, is a flowering plant in the family Agavaceae. It is native to the Mojave Desert and Sonoran Desert of southeastern California, Baja California, southern Nevada and western Arizona.