Complex sentence: Greasewood often grows in extensive, nearly pure stands in pluvial desert locations and is most common on fine-grained soils in areas with a relatively high water table.
Split into simpler sentences: Greasewood often grows in extensive, nearly pure stands in pluvial desert locations. Greasewood does not grow exclusively in highly saline areas, but is most common on fine-grained soils in areas with a relatively high water table.