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

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

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 within 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 within eastern Paraguay.

Description

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

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

External links

• GRIN-Global Web v 1.9.8.2: Taxonomy report of Dicksonia sellowiana

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