The name of this kind of palm trees from North America (Mexico, Arizona, California) is dedicated to the first U.S. president George Washington, the specific epithet refers to differentiation with the species ' filifera' in As the trunk of the 'robust ' young is more stocky. He straight trunk and slender (up to 1 m in diameter and 20 in height, with base slightly enlarged), gray or gray-brown with horizontal stripes and small vertical slits, usually occurs at the base of adventitious roots or air escaping from soil.
E 'coated with a long sleeve dry leaves hanging, the palmate leaves are very large, with little strip of 1 m or more in diameter, divided into about 50-70 segments, and these are about 3 cm wide, divided by deep sinuses more than 3 / 4 plate, so this is a little stiff and the tips of the segments are often flabby and sagging. Measure the petiole 1 to 2 m in length and is equipped with spines along the entire length of the small, are irregular and reddish, sometimes bifid. 
The inflorescence, yellow, measuring nearly 5 m in and out from the arched crown and is surrounded by two Spathes paper at the base and is divided into numerous branches drooping their own branches. The flowers are hermaphroditic, are whitish, while the fruits (of 7-8 mm) are grouped in clusters and dark brown. 
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