The most versatile plant in the desert is the Yucca. It comes in several sub species but all of them are very useful.
The plant has sword like leaves that grow out with points and a tough outside but inside are thousands of fibers that can be broken down by pounding into fiber for cordage. The stem if it has one and is not dead can be broken off, peeled and eaten or cooked.The Flowers on the stem can be eaten and the fruit that the flowers later on produce can be peeled and eaten also as well as the seeds in the fruit being ground up and used as flour. Lastly the roots can be dug up and eaten or boiled and used to make a mild soap.
The roots aren’t that bad and cook up decently. They can be made into anything you make out of a potato although they are not as nutritious.
This is a coil of thin rope made out of Yucca fiber. It’s tough and works very well when braided. I’ve personally used Yucca fiber to patch up my pack and if you bite down on the point of the leaf but not all the way through and pull the point out with your teeth you’ll pull a few fiber strands with you and you have a needle and threat right there to use to fix anything including sewing up a wound.
The Baccata or Banana is edible raw and has disc like seeds in it that can be ground down for flour. All together the plant offers just about everything you need except water.