
1) Fern genus 2) Genus equisetum 3) Horsetails 4) Living fossil 5) Medicinal plant
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https://www.crosswordclues.com/clue/equisetum

Equisetum (əm; horsetail, snake grass, puzzlegrass) is the only living genus in Equisetaceae, a family of vascular plants that reproduce by spores rather than seeds. Equisetum is a `living fossil` as it is the only living genus of the entire class Equisetopsida, which for over one hundred million years was much more diverse and dominated the un.....
Found on
http://en.wikipedia.org/wiki/Equisetum

• (n.) A genus of vascular, cryptogamic, herbaceous plants; -- also called horsetails.
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http://thinkexist.com/dictionary/meaning/equisetum/

Equisetum (a modern genus of horsetail) is a primitive, spore-bearing plant (a sphenopsid) with rhizomes. Its side branches are arranged in rings along the hollow stem. Other genera of horsetail were common during the Mesozoic Era , like Neocalamites, Calamites etc. Horsetails date from the Devonian period 408-360 million years ago, but are still a...
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http://www.enchantedlearning.com/subjects/dinosaurs/glossary/

(Horsetail Rush, Scouring Rush) These hardy perennials are commonly known as Horsetail Rush or Scouring Rush. These plants grow wild in North America and are suited for planted at the edge of the water garden. E. hyemale grows up to 4 feet high. It has hollow, bright green, furrowed stems that are banded with black; they resemble little Bamboo plan...
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http://www.encyclo.co.uk/local/10004

Origin: L, the horsetail, fr. Equus horse + seta a thick, stiff hair, bristle. ... <botany> A genus of vascular, cryptogamic, herbaceous plants; also called horsetails. ... The Equiseta have hollow jointed stems and no true leaves. The cuticle often contains siliceous granules, so that one species (E. Hyemale) is used for scouring and polishi...
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http://www.encyclo.co.uk/local/20973
Eq`ui·se'tum noun ;
plural Equiseta . [ Latin , the horsetail, from
equus horse +
seta a thick,, stiff hair, bristle.]
(Botany) A genus of vascular, cryptogamic, herbaceous plants; -- also called
horsetails . » The
Equiseta have hollow j...
Found on
http://www.encyclo.co.uk/webster/E/60

Equisetum is the Horse-tail genus of flowering plants belonging to the Equisetaceae. They are mostly natives of northern temperate regions, occurring usually in wet, marshy ground. They have a creeping rootstock, from which rise vertical jointed stems with small leaves arranged in whorls. In many species the first vertical stems are unbranched and ...
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http://www.probertencyclopaedia.com/browse/BE.HTM

[
n] - horsetails
Found on
http://www.webdictionary.co.uk/definition.php?query=Equisetum
genus Equisetum noun horsetails; coextensive with the family Equisetaceae
Found on
https://www.encyclo.co.uk/local/20974

any plant of the genus Equisetum, comprising the horsetails.
Found on
https://www.infoplease.com/dictionary/equisetum
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