Plante herbacée dont les feuilles sont grandes et extrêmement découpées, et qui croît ordinairement dans les terrains sablonneux.
ETYM Old Eng. braken, AS. bracce. Related to Brake.
1. Fern of southeastern Asia; not hardy in cold temperate regions; SYN. Pteridium esculentum.
2. Large coarse fern often several feet high; essentially weed ferns; cosmopolitan; SYN. pasture brake, brake, Pteridium aquilinum.
Large fern, especially Pteridium aquilinum, abundant in the northern hemisphere. A perennial rootstock throws up coarse fronds.
ETYM AS. fearn; akin to Dutch varen, German farn, farn kraut; cf. Skr. parna wing, feather, leaf, sort of plant, or Lith. papartis fern.
Any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores.
Plant of the class Filicineae, related to gymnosperms and angiosperms; however, ferns reproduce by spores and not seed. Most are perennial, spreading by low-growing roots. The leaves, known as fronds, vary widely in size and shape. Some taller types, such as tree-ferns, grow in the tropics. There are over 7,000 species.
Common forms include polypody (Polypodium); shield fern (Polystichum); maidenhair (Adiantum capillus-veneris); and bracken (Pteridium), a common weed.