New tumbleweed species is taking over California, Science

Nonnative Species - Petrified Forest National Park (U.S. National Park Service)

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Drought triggers Southern California tumbleweed infestation - Los Angeles Times

Growing Wild in the West: Photos of Invasive Tumbleweeds

Tumbleweed terrain terrors take over Nassau beaches, pose threat to local wildlife

Texas Tumbleweeds are Selling for Big Money on and

Why do tumbleweeds tumble?

A Northern Nevada Homeowner's Guide to Identifying and Managing Russian Thistles, Extension

Tumbleweeds - National Geographic Magazine