Q.Joshua tree seedling
I bought a Joshua tree seedling online. It came with no soil on the roots, which were wrapped in a slightly damp paper towel. About 1/3 of the leaves were brown and rolled up (vertically). What is the prognosis for survival?
Bareroots are commonly shipped in this manner.
Most garden centers will provide planting and growing directions and will guarantee the health of the bareroot tree.
If you have concerns on the health of the tree seedling, I could contact the grower.
Here are a couple of links to get you started with planting.