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{{Short description|Species of fern}}
The '''Xaxim''', or '''samambaiaçu''' or '''samambaiaçu-imperial''' (''Dicksonia sellowiana'') is an arborescent [[fern]]. Belongs to the family [[Dicksoniaceae]], native from [[Atlantic Forest]] and [[Central America]]. In [[Brazil]] it is found in the states of [[Minas Gerais]], [[Rio de Janeiro]], [[São Paulo]], [[Paraná]], [[Santa Catarina]] and [[Rio Grande do Sul]]). The xaxim has an erect and cilindric [[caudex]], reaching sometimes more than 10 meters heigh, the [[frond]]s are [[bippenate]] reaching two meters length. Due to illegal extraction, the species is [[in risk of extinction]].
{{more citations needed|date=July 2018}}
{{Speciesbox
| image = Dicksonia sellowiana in a Brasilian Forest.jpg
| genus = Dicksonia
| species = sellowiana
| authority = [[William Jackson Hooker|Hook.]]
}}

'''''Dicksonia sellowiana''''', the '''xaxim''', or '''samambaiaçu''' or '''imperial samambaiaçu''', is an arborescent [[fern]] in the family [[Dicksoniaceae]], native to the tropical [[Americas]].

==Distribution==
The fern is native to Southern [[Mexico]], [[Central America]], and [[South America]].

In the South American [[Atlantic Forest]] biome, it is found in: [[Southeastern Brazil]] in the states of [[Minas Gerais]], [[Rio de Janeiro (state)|Rio de Janeiro]], [[São Paulo (state)|São Paulo]], [[Paraná (state)|Paraná]], [[Santa Catarina (state)|Santa Catarina]], and [[Rio Grande do Sul]]; in northeast of [[Argentina]] within [[Misiones Province]]; and in eastern [[Paraguay]].

==Description==
''Dicksonia sellowiana'' has an erect and cylindrical [[caudex]], reaching sometimes more than {{convert|10|m}} high, the [[frond]]s are [[bipinnate]] and {{convert|2|m|abbr=on}} long. Due to illegal extraction, the species is at risk of [[extinction]].

===Varieties===
Dicksonia sellowiana is variable in its form. Variations are sometimes treated as separate [[variety (botany)|varieties]], which include:<ref>{{Cite web |url=http://www.forestferns.co.uk/tree-ferns/dicksonia/dicksonia-sellowiana# |title=Dicksonia sellowiana |access-date=2011-08-26 |archive-url=https://web.archive.org/web/20110915173642/http://www.forestferns.co.uk/tree-ferns/dicksonia/dicksonia-sellowiana# |archive-date=2011-09-15 |url-status=dead }}</ref>
*''Dicksonia sellowiana'' var. ''ghiesbreghtii''
*''Dicksonia sellowiana'' var. ''gigantea''
*''Dicksonia sellowiana'' var. ''karsteniana''
*''Dicksonia sellowiana'' var. ''lobulata''

==References==
{{Reflist}}

==External links==
{{Commons category|position=left|Dicksonia sellowiana|<br />Dicksonia sellowiana}}
* [https://npgsweb.ars-grin.gov/gringlobal/taxonomydetail.aspx?id=13923 GRIN-Global Web v 1.9.8.2: Taxonomy report of ''Dicksonia sellowiana'']

{{Taxonbar|from=Q3021768}}

[[Category:Dicksoniaceae]]
[[Category:Ferns of the Americas]]
[[Category:Ferns of Argentina]]
[[Category:Ferns of Brazil]]
[[Category:Ferns of Ecuador]]
[[Category:Ferns of Mexico]]
[[Category:Flora of Central America]]
[[Category:Flora of northern South America]]
[[Category:Flora of southern South America]]
[[Category:Flora of western South America]]
[[Category:Flora of the Atlantic Forest]]
[[Category:Flora of Southwestern Mexico]]
[[Category:Flora of the Amazon]]
[[Category:Flora of Veracruz]]
[[Category:Neotropical realm flora]]
[[Category:Vulnerable flora of South America]]
[[Category:Plants described in 1844]]
[[Category:Taxa named by William Jackson Hooker]]
[[Category:Garden plants of Central America]]
[[Category:Garden plants of South America]]


{{Cyatheales-stub}}

Latest revision as of 16:09, 8 January 2024

Dicksonia sellowiana
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Cyatheales
Family: Dicksoniaceae
Genus: Dicksonia
Species:
D. sellowiana
Binomial name
Dicksonia sellowiana

Dicksonia sellowiana, the xaxim, or samambaiaçu or imperial samambaiaçu, is an arborescent fern in the family Dicksoniaceae, native to the tropical Americas.

Distribution[edit]

The fern is native to Southern Mexico, Central America, and South America.

In the South American Atlantic Forest biome, it is found in: Southeastern Brazil in the states of Minas Gerais, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, and Rio Grande do Sul; in northeast of Argentina within Misiones Province; and in eastern Paraguay.

Description[edit]

Dicksonia sellowiana has an erect and cylindrical caudex, reaching sometimes more than 10 metres (33 ft) high, the fronds are bipinnate and 2 m (6 ft 7 in) long. Due to illegal extraction, the species is at risk of extinction.

Varieties[edit]

Dicksonia sellowiana is variable in its form. Variations are sometimes treated as separate varieties, which include:[1]

  • Dicksonia sellowiana var. ghiesbreghtii
  • Dicksonia sellowiana var. gigantea
  • Dicksonia sellowiana var. karsteniana
  • Dicksonia sellowiana var. lobulata

References[edit]

  1. ^ "Dicksonia sellowiana". Archived from the original on 2011-09-15. Retrieved 2011-08-26.

External links[edit]

Wikimedia Commons has media related to
Dicksonia sellowiana.


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