The sweet fruit pulp of the fan palm is edible. These ponds are part of the self-guided tour among the California Fan Palm groves. It exhibits feather-shaped leaves, as compared to the fan-shaped leaves of the real fan palm. Desert fan palm oases are rare ecological communities found only in the Colorado Desert. Birdwatching spots include fan palm oases, the Barker Dam, and Smith Water Canyon. Other common names include California fan palm and petticoat palm. Desert California fan palm oases are rare ecological communities found only in the Colorado Desert. A notable tree whose fruits they harvested is the California fan palm. The only palm native to California, "Washingtonia filifera" (desert fan palm), grows at the oases. Growing to tall, "Trachycarpus fortunei" is a single stemmed fan palm. Licuala spinosa, the Mangrove fan palm, is a species of palm in the genus "Licuala". Washingtonia robusta (Mexican fan palm) and Phoenix canariensis (Canary Island date palm). The fan palm is a relict species, although not listed under the Endangered Species Act. The endangered California Fan Palm, "Washingtonia filifera" grows in a few spots in the county.