Mexican Fan Palms originate from the western Sonora Desert and Baja California. This species develops a more slender trunk than Washingtonia filifera, and may grow remarkably higher, to a maximum height of 34 metres. Additionally, the crown is narrower 3 to 4 metres in diameter. The leaves consist of a toothed petiole to 1 metre in length and a roundish blade that does not reveal many fibres when split by strong winds. Dead leaves drop off leaving a grey bark, but often they are cut off earlier and the leaf base may last for several years. In summer, the inflorescences may reach 3 metres in length, with an abundance of pale-orange flowers. The ripe drupes are almost black and can be eaten, although they are not worth the effort compared with true dates. The palms love the sun and take poor soils and some drought when established. They resist frost and desiccating winds as may occur in Arriyadh, and the city always has many good specimens on display. They grow quickly if watered and occasionally supplied with fertiliser. Mexican Fan Palms are popular street trees with very low maintenance requirements, and never exceed the designated width. They can be grown in containers and make attractive tufts if grouped. Sowing is the only feasible way to propagate these palms. The seeds should not be stored for long, since their high fat content results in infertility when they turn rancid. They are best soaked in water for one or two days.