Bracken

Bracken ( Pteridium aquilinum )

The eagle ferns ( Pteridium ) are a cosmopolitan genus of ferns.

Features

The eagle ferns are perennials and have a long, underground rhizome. The plants are 0.6 to 2 meters high. Fertile and sterile fronds are more or less the same design. They are long stalks and are at a greater distance from each other on the rhizome. The fronds are pinnate three times and have the lower pinnae nectaries.

The sori are combined to form a line-like rim. They are covered by the bent edge of the sheet, creating a false curtain is formed.

Dissemination

The genus is distributed worldwide.

System

The genus Pteridium include about 5 to 11 species:

  • Bracken ( Pteridium aquilinum (L.) Kuhn, Kersten, traveling East Afr 3 (3):. 11 ​​(1879 ) ). Widely used, with numerous subspecies. Pteridium aquilinum (L.) Kuhn subsp. aquilinum
  • Pteridium aquilinum subsp. capense ( Thunb. ) C. Chr, Ind. Fil 591 ( 1906).
  • Pteridium aquilinum subsp. decompositum ( Gaudich. ) Lamoureux ex JAThomson, Telopea 10 (4): 800 ( 2004).
  • Pteridium aquilinum subsp. FEEI ( W.Schaffn. ex Fée ) JAThomson, Mickel & Mehltr. , bot J. Linn. Soc. 157 (1): 13 (2008).
  • Pteridium aquilinum subsp. latiusculum ( Desv. ) W.C.Shieh, Quart. J. Chin. Forest. 6 (4): 98 ( 1973).
  • Pteridium aquilinum var pseudocaudatum ( Clute ) Heller, Cat. N. Amer. Pl ed 2: 12 ( 1900).
  • Pteridium aquilinum subsp. pinetorum ( CNPage & RRMill ) JAThomson, Telopea 10 (4): 798 ( 2004).
  • Pteridium aquilinum subsp. pubescens ( Underw. ) JAThomson, Mickel & Mehltr. , bot J. Linn. Soc. 157 (1): 14 (2008).
  • Pteridium caudatum subsp. arachnoideum ( Kaulf. ) Lellinger, Amer. Remote J. 93 (3): 150 (2003).
  • Pteridium caudatum (L.) Maxon subsp. caudatum

Swell

  • Siegmund Seybold (ed.): Schmeil - Fitschen interactive. CD -ROM, Version 1.1, Quelle & Meyer, Wiebelsheim 2002, ISBN 3-494-01327-6.
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