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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.
- Polypodiopsida
- Equisetum, L.
Horsetail is a genus of fifteen species of perennial herbs with jointed, ridged stems and sheath-like leaves. Learn about their medicinal, nutritional and detoxification benefits, their distribution and classification, and their history and folklore.
- The Editors of Encyclopaedia Britannica
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.
- E. arvense
- Equisetum
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.
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.
15 de jan. de 2013 · Equisetum is a genus of ancient vascular plants with 15 species, including the giant horsetails. Learn about their unique features, adaptations, and phylogenetic position in this comprehensive review article.
Learn about horsetails, a group of plants with jointed stems, small leaves and spores with elaters. Find out their taxonomy, structure, reproduction, matter and energy, and interactions with the environment.
