bracken

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bracken

or

brake,

common name for a tall fern (Pteridium aquilinum) with large triangular fronds, widespread throughout the world, often as a weed. It is considered poisonous to livestock when eaten in quantity, but the rootstocks and the young shoots, cooked, are used for food. Bracken is also a source of tannin and is used for thatching and as bedding for livestock. A beverage is made from the roots. The names bracken and brake are sometimes also applied to other large, coarse ferns and, as general terms, to a thicket of such plants. Bracken is classified in the division PolypodiophytaPolypodiophyta
, division of the plant kingdom consisting of the plants commonly called ferns. The ferns are vascular plants with stems, roots, and leaves. The small and inconspicuous gametophyte and the large spore-producing fern plant are quite independent of each other.
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, class Polypodiopsida, order Filicales, family Polypodiaceae.

bracken

1. any of various large coarse ferns, esp Pteridium aquilinum, having large fronds with spore cases along the undersides and extensive underground stems
2. a clump of any of these ferns
References in periodicals archive ?
H-ras inmunohistochemical expression and molecular analysis of urinary bladder lessions in grazing adult cattle exponed to bracken fern.
2002, 'Aspects of the use and fire management of bracken fern (Pteridium esculentum)', in D Georghui (ed.
In many parts of North America bracken fern carpets thousands upon thousands of acres.
PTERIDIUM {ter-RID-ee-um} Gleditsch ex Scopoli 1760 * Bracken Ferns * [Greek, pteridion, diminutive of Pteris, a wing; an ancient name for a fern.
Reduction of Cr(VI) levels in solution using bracken fern biomass: Batch and Columna studies.
Key words: Ultrastructure, enzootic haematuria, cytomegalovirus, bracken fern, bovine
A former clergyman and retired teacher, Herb, 67, saunters along the dirt track edged with salal, bracken ferns, young alders, pine--his lanky youthfulness undiminished by time.
Then the stag belted out an ear-splitting roar, and after hearing something--probably our heartbeats--the stag took two cautious steps uphill until his big brown eyes cleared the bracken ferns.
The carcinogenic substances (chemicals) in, and produced by, bracken ferns are also natural but not benign.