|Copyright: Raimundo Mesquita (mesquens)
|Date Taken: 2010-05-28|
|Categories: Rain Forest|
|Camera: Panasonic Lumix DMC LZ7|
|Exposure: f/2.8, 1/30 seconds|
|More Photo Info: [view]|
|Photo Version: Original Version|
|Date Submitted: 2010-05-28 13:37|
|[Note Guidelines] Photographer's Note|
|Brackens (Pteridium) are a genus comprising several species of large, coarse ferns. Ferns (Pteridophyta) are vascular plants that have alternating generations, large plants that produce spores and small plants that produce sex cells (eggs and sperm). Brackens are in the family Dennstaedtiaceae, which are noted for their large, highly divided leaves. They are commonly found on moorland. Brackens are cosmopolitan, being found on all continents except Antarctica and in all environments except deserts. The genus probably has the widest distribution of any fern genus in the world.|
In the past, the genus was commonly treated as having only one species, Pteridium aquilinum, but the recent trend is to subdivide it into about ten species.
As ferns, brackens do not have seeds or fruits, but the immature fronds, known as fiddleheads, are edible.
The word bracken is of Old Norse origin, related to the Swedish word bräken, meaning fern.
1 Description and biology
3 Fungi associations
4 Other plant associations
5 Animal species that use bracken
10 See also
12 External links
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El brote tierno del meristemo de este helecho aunque algo desenfocado evidencia su energía vital. Felicidades