Albedo (Color), Normal, Roughness, and Opacity (for needles/leaves).
Plants like Agave or Aloe that store water in fleshy leaves.
"Soak and Dry" method; water deeply, then let soil go 100% dry.
Tropical desert plants use specific biological "tricks" to stay alive:
Native to the Americas; they store water in succulent stems and use spines for shade/protection.