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Giant horsetails are usually living species of horsetail that grow to very large sizes, more than 1.5 metres (5 ft).
The following species are commonly known as "giant horsetails":
* ''
Giant horsetails are usually living species of horsetail that grow to very large sizes, more than 1.5 metres (5 ft).
The following species are commonly known as "giant horsetails":
* ''Equisetum giganteum
''Equisetum giganteum'', with the common name southern giant horsetail, is a species of horsetail native to South America and Central America, from central Chile east to Brazil and north to southern Mexico.
Description
It is one of the largest h ...
'' (southern giant horsetail, from Latin America)
* ''Equisetum telmateia
''Equisetum telmateia'', the great horsetail or northern giant horsetail, is a species of ''Equisetum'' (puzzlegrass) with an unusual distribution, with one subspecies native to Europe, western Asia and northwest Africa, and a second subspecie ...
'' (northern giant horsetail, from North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
, North Africa and Eurasia)
* '' Equisetum myriochaetum '' (Mexican giant horsetail, from Mexico, Central America and Northern South America)
In addition, any giant member of the Equisetopsida (horsetails and their prehistoric
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of ...
relatives) is liable to be called "giant horsetail" even though they are not true horsetails. Most often, the term "giant horsetail" in this somewhat inaccurate sense refers to 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 ...
in Paleozoic contexts; in the Mesozoic, the term usually refers to the ''Equisetites
Equisetaceae, sometimes called the horsetail family, is the only extant family of the order Equisetales, with one surviving genus, ''Equisetum'', which comprises about twenty species.
Evolution and systematics
Equisetaceae is the only survivin ...
'' assemblage.
The oldest known fossil of giant horsetail dates from Miocene epoch and is found in Ñirihuau Formation
Ñirihuau is a village and municipality in RÃo Negro Province in Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an are ...
in Patagonia.
References
{{Plant common name