04 March 2011

Filmy-ferns along the Afon Nedd

Wilson's Filmy-fern (Hymenophyllum wilsonii)
Tunbridge Filmy-fern (Hymenophyllum tunbrigense)
On Tuesday (1st March) Charles Hipkin showed me colonies of both of Britain's filmy-ferns along a section of the Afon Nedd just over the border in Breconshire VC42. Tunbridge Filmy-fern (Hymenophyllum tunbrigense) was more abundant with two populations growing as more-or-less pure stands on vertical cliffs, whereas Wilson's Filmy-fern (H. wilsonii) was noted in just one location amongst a weft of mosses.
Indusium valves smooth-edged on Wilson's
Indusium valves toothed on Tunbridge
Bryophytes were very prominent at this site with a good number of noteworthy species such as the curiously named Greater Whipwort (Bazzania trilobata).
For more bryophytes from this site see http://moonmoths.blogspot.com/2011/03/brophytes-along-afon-nedd-above-pont.html

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