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  1. en.wikipedia.org › wiki › EquisetumEquisetum - Wikipedia

    The leaves of horsetails are arranged in whorls fused into nodal sheaths. The stems are usually green and photosynthetic, and are distinctive in being hollow, jointed and ridged (with sometimes 3 but usually 6–40 ridges). There may or may not be whorls of branches at the nodes.

  2. Equisetum arvense, the field horsetail or common horsetail, is an herbaceous perennial plant in the Equisetidae (horsetails) sub-class, native throughout the arctic and temperate regions of the Northern Hemisphere.

  3. Horsetail is a genus of fifteen species of rushlike perennial herbs, the only living plants in the order Equisetales and the class Equisetopsida. Learn about their characteristics, distribution, medicinal and scouring uses, and how they differ from ferns and gymnosperms.

    • The Editors of Encyclopaedia Britannica
  4. en.wikipedia.org › wiki › EquisetidaeEquisetidae - Wikipedia

    Equisetidae is one of the four subclasses of Polypodiopsida (ferns), a group of vascular plants with a fossil record going back to the Devonian. They are commonly known as horsetails. [2] They typically grow in wet areas, with whorls of needle-like branches radiating at regular intervals from a single vertical stem.

  5. Horsetails, the genus Equisetum, are a very easily recognized group of plants that are commonly found throughout the world. They represent a very small remnant, only a single genus with less that 100 species, of a group that in the Paleozoic was a much more conspicuous component of the earth's flora.

  6. Learn about common horsetail (Equisetum arvense), an herbaceous perennial relative of ferns that grows in moist soils and has medicinal and abrasive uses. Find out its range, distribution, cultural history, and potential invasiveness.

  7. 15 de jan. de 2013 · Equisetum is a genus of ancient vascular plants with 15 species, including the giant horsetails. Learn about their morphology, anatomy, distribution, adaptations, and phylogenetic relationships in this article.