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Fetus


Fetus
Photo Information
Copyright: Raimundo Mesquita (mesquens) Gold Star Critiquer/Gold Note Writer [C: 168 W: 9 N: 287] (2073)
Genre: Plants
Medium: Color
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
Viewed: 3733
Points: 2
[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.

Contents [hide]
1 Description and biology
2 Distribution
3 Fungi associations
4 Other plant associations
5 Animal species that use bracken
6 Uses
7 Poisoning
8 Control
9 Gallery
10 See also
11 References
12 External links

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Critiques [Translate]

Raimundo:

El brote tierno del meristemo de este helecho aunque algo desenfocado evidencia su energía vital. Felicidades

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