
The SciencesMarch 1, 1991
Tumbleweed
This enduring symbol of the American frontier was actually an import from southern Russia that exploited the ecology of the Great Plains, becoming a major agricultural pest in the late 19th century

Tumbleweed
This enduring symbol of the American frontier was actually an import from southern Russia that exploited the ecology of the Great Plains, becoming a major agricultural pest in the late 19th century