Vestal, Paul A. A. G. Bush Science Center; Department of Biology, Rollins College, Winter Park, Florida.
Last reviewed:January 2020
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An order of the division Sphenophyta, subkingdom Embryobionta. The Equisetales, commonly known as horsetails, is represented by a single living genus, Equisetum, with about 25 species found in both moist and dry habitats. These plants grow throughout the world, except in Australia and New Zealand. The plants range from herbaceous to shrubby and rarely exceed 3 or 4 ft (0.9 or 1.2 m) in height, although some tropical species grow much taller. See also: Embryobionta; Sphenophyta
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