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Feb 7, 2022 · Tumbleweeds have never stopped spreading. Nearly every state in the U.S. is now home to Russian thistle, as well as several newer tumbleweed species that arrived as immigrants from around the...
- Sidney Stevens
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A tumbleweed is a structural part of the above-ground anatomy of a number of species of plants. It is a diaspore that, once mature and dry, detaches from its root or stem and rolls due to the force of the wind.
Mar 8, 2024 · Tumbleweeds originated in Russia and Siberia and they were brought to the United States in the 1870s, hidden among imported flax seeds, according to University of California, Riverside. It only took 20 years for the plants to spread throughout the western United States and parts of Canada.
Jun 6, 2017 · Most species of tumbleweeds are from the whole plant except the roots while in some other plants, tumbleweeds could be formed from an inflorescence or hollow fruit that could be without the stem and root systems.
This detached anatomical part of Salsola tragus is colloquially called "tumbleweed" (although there are many other plant species that also produce tumbleweeds). Once mature, dry, and detached from the plant, this tumbleweed will tumble (i.e., roll) due to the force of the wind.
Jun 14, 2024 · Tumbleweed, plant that breaks away from its roots and is driven about by the wind as a light rolling mass, scattering seeds as it goes. Examples include pigweed (Amaranth retroflexus, a widespread weed in the western United States) and other amaranths, tumbling mustard, Russian thistle, the steppe.
May 6, 2018 · Genetic tests have shown that California’s most common tumbleweed, known as Russian thistle, likely came from Ukraine, said retired plant population biologist Debra Ayres, who studied tumbleweeds...
