Dicksonia
Dicksonia is a genus of tree ferns in the order Cyatheales. It is regarded as related to Cyathea, but is considered to retain more primitive traits, dating back at least to the Jurassic and Cretaceous periods. The fossil record includes stems, pinnules, and spores.
| Dicksonia | |
|---|---|
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| Dicksonia antarctica | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Class: | Polypodiopsida |
| Order: | Cyatheales |
| Family: | Dicksoniaceae |
| Genus: | Dicksonia L'Hér. |
| Species | |
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See text. | |
The genus contains 20–25 species, distributed from Mexico to Argentina, Brazil, Uruguay and Chile, St. Helena, New Zealand, New Caledonia, Australia, Indonesia, New Guinea, and the Philippines. New Guinea has the greatest diversity, with five species.
Species of Dicksonia found in cultivation include:
- D. antarctica, soft tree fern[1]
- D. fibrosa, woolly tree fern
- D. squarrosa, rough or slender tree fern
The genus was first described by Charles Louis L'Héritier de Brutelle in 1788. The name honors James Dickson, a prominent nurseryman and botanist.[1]
Species
- Dicksonia antarctica, soft tree fern, Tasmanian tree fern – Australia
- Dicksonia arborescens, St. Helena (type species)
- Dicksonia archboldii, New Guinea
- Dicksonia baudouini, New Caledonia
- Dicksonia berteriana, Juan Fernández Islands
- Dicksonia blumei, Indonesia, Philippines
- Dicksonia brackenridgei, Fiji, Samoa
- Dicksonia externa, Juan Fernández Islands
- Dicksonia fibrosa, woolly tree fern, kuripaka or wheki-ponga – New Zealand
- Dicksonia grandis, New Guinea
- Dicksonia herbertii, Northeastern Queensland, Australia
- Dicksonia hieronymi, New Guinea
- Dicksonia lanata, Tuokuro. New Zealand
- Dicksonia lanigera, New Guinea
- Dicksonia mollis, Indonesia
- Dicksonia sciurus, New Guinea
- Dicksonia sellowiana, xaxim, samambaiuçu (in Portuguese) – Southern Mexico through Central America and Northern South America to Bolivia and Uruguay
- Dicksonia squarrosa, rough tree fern, slender tree fern, New Zealand tree fern, wheki – New Zealand
- Dicksonia steubelii, Northern Peru
- Dicksonia thyrsopteroides, New Caledonia
- Dicksonia youngiae, bristly tree fern – Australia
References
- Dicksonia antarctica – the soft tree fern. Australian National Botanic Gardens. 2008
- Large, M.F. and J.E. Braggins Tree Ferns. Timber Press, Inc. (2004).
- Lobin, Wolfram. List of the American Dicksonia Species. Scientific Authority of Germany, Bonn 2001.
External links
- Community: Care and propagation of Tree ferns (German/English)
- Fern Files: Dicksonia
- L'Héritier's original diagnosis of the genus online on Project Gutenberg
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