1) Xeric 
drought resistant through adaptation
able to withstand drought
adapted to dry or arid conditions, places where fresh water is scarce or where water absorption is difficult due to an excess of dissolved salts
<ecology> Adapted to survive in a region where access to water is limited. ... (09 Oct 1997) ... 
adapted to dry or arid conditions, places where fresh water is scarce or where water absorption is difficult due to an excess of dissolved salts
drought resistant through adaptation
[adj] - adapted to a xeric (or dry) environment
xerophyte, xerophyll, xerophytic 1. A plant living in a dry habitat, typically showing xeromorphic or succulent adaptations and able to tolerate long periods of drought. 2. A plant that is adapted to an arid or dry environment. A xerophilous plant and a plant that is structurally adapted for growth with a limited water supply. The term is genera...
adjective adapted to a xeric (or dry) environment; `cacti are xerophytic plants`; `xerophytic adaptations`