Pteridium aquilinum

Bracken

Pteridium aquilinum, Bracken. Largest fern in the UK, dying back in autumn. Spreads underground by rhizomes, forming large stands. Very invasive on moorland and common on rough valley land.


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Pteridium aquilinum, Bracken
Stand of Bracken
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Pteridium aquilinum, Bracken
Fronds unfurling
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Pteridium aquilinum, Bracken
Bracken on moorland
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Pteridium aquilinum, Brackene
Frond upper
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Pteridium aquilinum, Brackene
Sori under frond
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Pteridium aquilinum, Brackene
Sori
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Pteridium aquilinum, Brackene
Section

Photograph detail


Slide 1: Pteridium aquilinum, Bracken. Stand near disused railway, Hargill, Redmire. June.


Slide 2: Pteridium aquilinum, Bracken. Frond unfurling. Hargill, Redmire. June.


Slide 3: Pteridium aquilinum, Bracken. Dense cover of Bracken on moorland, with Hard Rush, Juncus inflexus. Golden Groves. Redmire Moor. June.


Slide 4: Pteridium aquilinum, Bracken. Upper surface of frond. Hargill, Redmire. July.


Slide 5: Pteridium aquilinum, Bracken. Lower surface of frond showing sori. Hargill, Redmire. August.


Slide 6: Pteridium aquilinum, Bracken. Lower surface of frond showing sori on edge of pinna. Collected from Hargill, Redmire. August.


Slide 7: Pteridium aquilinum, Bracken. Cross section of pinna. Collected from Hargill, Redmire. August.