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Wasowski, Sally and Andy
Washingtonia filifera (Linden ex André) H. Wendl.
California fan palm, Desert palm
Synonym(s): Brahea filamentosa, Brahea filifera, Neowashingtonia filamentosa, Pritchardia filamentosa, Pritchardia filifera, Washingtonia filamentosa, Washingtonia filifera var. robusta
USDA Symbol: WAFI
The California fan palm will eventually grow to 50 ft. Unlike other palms, as the leaves of California fan palm die, they fold down against the stout trunk rather than dropping off. This dense shag or thatch of dead leaves may be burned away with a light fire. The large, gray-green leaf blades are from 3-6 ft. long and segmented nearly to the middle. They hang from stout, spiny petioles. Relatively small, whitish flowers are followed by hard, black, pea-sized fruits.
The largest native palm of the continental United States as well as the only western species, it is also known as Desert-palm. Another name is Petticoat-palm from the shaggy mass of dead leaves hanging against the trunk. Groves are in Palm Canyon near Palm Springs and in Joshua Tree National Monument. It is cultivated widely as an ornamental along streets and avenues in southern California, southern Arizona, the Gulf States east to Florida, and in subtropical regions around the world. Indians ate the berries, both fresh and dry, and ground the seeds into meal. This genus honors the first president of the United States.
Plant CharacteristicsDuration: Perennial Habit: Tree Flower:
Fruit: Size Class:
Bloom InformationBloom Time: Jun
, NV Native Distribution:
& n. Baja Native Habitat:
Moist, alkaline spots near seeps & streams
Growing ConditionsLight Requirement:
Sun Soil Moisture:
Moist Soil Description:
Moist, alkaline soils. Conditions Comments:
When planted together in desert areas, California palms provide deep, cool shade. The thatch of dead leaves should be removed periodically. These native
palms survive light fires to remove the thatch because their vascular systems are spread throughout the trunks, not right under bark
like other trees. Also unlike other trees, palms have no true bark
and do not show growth rings.
PropagationDescription: Sow fresh seed in a friable medium. Germination takes 4-15 weeks.
Seed Collection: Not Available
Seed Treatment: No treatment necessary.
Commercially Avail: yes
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Santa Barbara Botanic Garden
- Santa Barbara, CA
Record Last Modified: 2009-02-20
Research By: TWC Staff