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Equisetales

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Kingdom  Plantae
Higher classification  Equisetopsida
Scientific name  Equisetales
Rank  Order
Equisetales httpsuploadwikimediaorgwikipediacommonsthu
Lower classifications  Puzzlegrass, Calamites

Equisetales is an order of Monilophytes with only one living family, Equisetaceae, containing the genus Equisetum (horsetails).

Classification

In the molecular phylogenetic classification of Smith et al. in 2006, Equisetales, in its present circumscription, was held to be the sole member of class Equisetopsida. The linear sequence of Christenhusz et al. (2011), intended for compatibility with the classification of Chase and Reveal (2009) which placed all land plants in Equisetopsida, made it the sole member of subclass Equisetidae, equivalent to Smith's Equisetopsida. The placement of Equisetales in subclass Equisetidae has subsequently been followed in the classifications of Christenhusz and Chase (2014) and PPG I (2016).

The fossil record includes additional extinct species in Equisetaceae and the extinct families Calamitaceae, Archaeocalamitaceae and Phyllothecaceae.

References

Equisetales Wikipedia


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