Equisetales is an order of subclass

Equisetidae 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. They typically grow in wet areas, with whorls of needle-lik ...

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

, 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 Calamitaceae is an extinct family of plants related to the modern horsetails. Some members of this family attained tree-like stature during the Carboniferous Period (around ) and in Permian Period, reaching heights of up to 20 meters. The famil ...

, Archaeocalamitaceae and

Phyllothecaceae The prehistoric family Phyllothecaceae, of the plant order Equisetales, was erected in 1828, when Brongniart described the type species ''Phyllotheca australis'' coming from Hawkesbury River, Australia. It existed during the Permian Period T ...

. Uma nova espécie de Phyllotheca Brongniart
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References

External links

* Fern orders Extant Carboniferous first appearances Carboniferous plants Prehistoric plant orders Taxa named by Augustin Pyramus de Candolle {{fern-stub