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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.
Equisetum is a "living fossil", the only living genus of the entire subclass Equisetidae, which for over 100 million years was much more diverse and dominated the understorey of late Paleozoic forests. Some equisetids were large trees reaching to 30 m (98 ft) tall. [3]
Equisetales. DC. ex Bercht. & J. Presl. Equisetales is an order of subclass Equisetidae with only one living family, Equisetaceae, containing the genus Equisetum (horsetails), as well as a variety of extinct groups, including the tree-like Calamitaceae .
Sphenophyllales. Equisetales. Equisetopsida, (division Pteridophyta), class of primitive spore-bearing vascular plants. Most members of the group are extinct and known only from their fossilized remains. The sole living genus, Equisetum, order Equisetales, is made up of 15 species of very ancient herbaceous plants, the horsetails and scouring ...
Order of ferns / From Wikipedia, the free encyclopedia. Equisetales is an order of subclass Equisetidae with only one living family, Equisetaceae, containing the genus Equisetum (horsetails), as well as a variety of extinct groups, including the tree-like Calamitaceae. Quick Facts Scientific classification, Families ... Equisetales.
The horsetails, called Equisetidae in the modern classification by Christenhusz et al. 2011, or also Equisetopsida or Equisetophyta, and in paleobotany it is more common Sphenopsida, are vascular plants related to ferns that appeared in Devonian, but currently only the genus Equisetum survives, although there are representatives of extinct ...
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Equus (genus) Equus. (genus) Equus is a genus of mammals in the family Equidae. It includes horses, asses, and zebras. Equus is the only living ( extant) genus of horses, and there are seven living species. They are the one-toed horses, and are adapted for living in various types of grasslands . The term equine refers to any member of this genus.
