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The fronds grow out of the underground, root-like stem on long stalks. The triangular scales along the stem have a dark centre which is a diagnostic character for this species. The fronds are broad, triangular and tri-pinnate, growing up to 120 cm long in good conditions, and forming dense crowns that arch outwards.
A fern of moist woodlands, streams, waterfalls and pockets of deep leaf litter.
Shoots appear late April or may and die back in autumn
Common and widespread in Britain.
Frequent in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 280 of the 617 tetrads.
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