West Highland Flora

Tunbridge Filmy Fern


Hymenophyllum tunbrigense

 

Hymenophyllum tunbrigense

Photo Carl Farmer
10 Jul 2004 Ord, Skye

Uncommon, on rock in shady humid conditions.

Indusium c 1 mm long, fronds c 2-8 cm long

ID: If indusia present, easily told  by their toothed margins, as in picture on left (indusia are the cups surrounding the dark sori).  If not, best told by dark veins not reaching the end of the frond segments.

Other features: Indusia about as broad as long, the two valves somewhat flattened together, more like an envelope than a cup.  Pinnae tend to be divided into more segments than Wilson's Filmy Fern.

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