equisetum - meaning and definition. What is equisetum
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What (who) is equisetum - definition

GENUS OF PLANTS
Scouring rush; Scouring-rush; Horsetails; Хвощ; Equiseta; Horsetail; Horsetail fern; Scouring rushes; Sphernophyta; Sphermophyta; Snake grass; Horsetail rush; Puzzlegrass; Allostelites; Hippochaete
  • ''[[Equisetum arvense]]'' (field horsetail)

equisetum         
[??kw?'si:t?m]
¦ noun (plural equiseta -t? or equisetums) Botany a plant of a genus that comprises the horsetails. [Genus Equisetum.]
Origin
mod. L., from L. equus 'horse' + saeta 'bristle'.
Equisetum         
·noun A genus of vascular, cryptogamic, herbaceous plants;
- also called horsetails.
Equisetum × trachyodon         
NOTHOSPECIES OF PLANT (USE EQUISETUM ×MACKAYI ?)
Equisetum trachyodon; Equisetum x trachyodon; Equisetum ×trachyodon
Equisetum × trachyodon is a nothospecies of Equisetum. Sometimes, it is considered as an individual species: Equisetum trachyodon.

Wikipedia

Equisetum

Equisetum (; horsetail, snake grass, puzzlegrass) is the only living genus in Equisetaceae, a family of vascular plants, which reproduce by spores rather than seeds.

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. The genus Calamites of the family Calamitaceae, for example, is abundant in coal deposits from the Carboniferous period. The pattern of spacing of nodes in horsetails, wherein those toward the apex of the shoot are increasingly close together, is said to have inspired John Napier to invent logarithms. Modern horsetails first appeared during the Jurassic period.

A superficially similar but entirely unrelated flowering plant genus, mare's tail (Hippuris), is occasionally referred to as "horsetail", and adding to confusion, the name "mare's tail" is sometimes applied to Equisetum.

Despite centuries of use in traditional medicine, there is no evidence that Equisetum has any medicinal properties.