The Australian Willow tree, or Geijera parviflora, is a medium size, upright tree with evergreen foliage.  Leaves are long and slender, and have a beautiful flutter in a breeze.  Flowers are inconspicuous and appear in Spring/Summer.  The Australian Willow is a great choice for screening as it's canopy tends to grow more up than out and can take on a more column-like shape if pruned as such.  This tree is very drought tolerant and requires little supplimental water once established.  Plant in full sun and provide well-drained soil.  This is a great drought-tolerant substitute for the well-loved Weeping Willow.  Works nicely in a Southwest style garden.  Grows to about 30 feet tall by 15-20 feet wide in it's maturity.