California fan palm
Washingtonia filifera
The palm encountered in the oases
within the Coachella Valley
Preserve is the California fan palm,
or Washingtonia filifera. It is the
There is another palm used widely
in the southern California area, the
Mexican fan palm, or Washingtonia
robusta. It is a native of Baja
California.

The Washingtonia filifera has a
very thick trunk and grows slowly to
about 45 feet (14 m) Washingtonia
robusta has a thin trunk, but grows
faster and can be twice as tall. Both
species have large, palmate leaves
with spiny petioles clustered at the
top of the trunk. (a petiole is the
stalk that connects the leaf to the
stem). Dead leaves hang vertically
and form what is called a skirt
around the trunk. Inflorescences,
or fruit stalks, extend beyond the
leaves and bear masses of tiny
white to cream colored flowers.
During the fall months, large
clusters of small hard fruit hang
from the tree. The palms may live
150 to 200 years.