Equisetum

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Equisetum

any pteridophyte plant of the genus Equisetum, comprising the horsetails. The plant is herbaceous, has rhizomes and a vertical stem with whorls of scale leaves, and is often found growing in water and damp conditions. It is the last living representative of the order Equisetales, members of which, during the time of the dinosaurs, grew as high as trees and were probably a major food source.

Equisetum

genus of the fern ally family Equisetaceae. These plants have a high content of thiaminase, and horses which eat a lot of them, usually in their hay, develop thiamin deficiency. This is characterized by incoordination, falling, bradycardia and severe cardiac irregularity. Response to treatment with thiamin is rapid and complete.
Includes E. arvense, E. hyemale, E. laevigatum, E. limosum, E. palustre, E. ramosissimum. Called also horsetails, foxtails, marestails.
References in periodicals archive ?
Although Coolidge admits she was originally hoping to play one of the more glamorous roles in the play (she showed up at the audition wearing a horse-tail plume, prepared to read for the part of the Countess De Lage), she said that, in the end, the character of Edith was somewhat an extension of herself, albeit an exaggerated one.
The lower incidence of wound suppuration in destitute Confederate hospitals has been attributed to the fact that they closed wounds with horse-tail hair which was first boiled, whereas the Northern Army used surgical silk which, although a better product, was not sterile,
Geda goes to the marginal areas of speech that name little-known or downright invented plants and animals in a great primeval marsh of being, where "God thinks by means of grasses: horse-tails and sunflowers," and thus Babylon comes back through the little shudders of a frog at night and through the dreams of one sitting under a sun-god tree and hearing hymns and music, and also how the earth lies down to sleep.