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Guayule, desert shrub (Parthenium argentatum) of the composite family containing rubber that can be accessed only by crushing the top of the plant. Guayule is native to the Chihuahuan desert of Mexico and southwestern Texas. It grows to about 2 ft (60 cm) and has silver, spear-shaped leaves.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Grand Rapids to Hadron