Bot. Zeitung (Berlin) 37: 68 (1879) APNI
Establishment means:Sparingly established
Palm tree, to 15 m high, trunk erect, stout, to about 100 cm diameter. Petiole with hooked spines. Lamina fan-shaped, drooping, deeply divided into 70–75 lanceolate lobes; margins with white cottony threads. Flowers white; perianth segments acute. Fruit c. 10 mm diam., black.
*GipP. Also naturalised WA, NT, SA. Native to western North America.
Commonly grown world-wide as an ornamental, naturalised in Victoria near Mildura.
Both Washingtonia filifera and W. robusta H.Wendland are grown as oramentals in Victoria. These species are not well differentiated, and are often difficult to distinguish when not growing together (the former being distinguished by its larger size). It is possible that both species may have naturalised, or will potentially naturalise in the future.
Species of Washingtonia are known for their ability to survive extreme temperatures.
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