Hymenophyllum.] filices. 379 



HTMEN0PH7LLUM Sm. 

 1. H. tunbrigense (Sm.) — Tunbridge Filmy-Fern. 

 Districts 12 3---7 8 9-1112 

 Lat. 51°-55°. West of Ireland chiefly. 

 Type in Great Britain, Atlantic. 



Damp shady rocks, mossy trunks of trees, &c. ; local and 

 rather rare. Fl. July to October. 



Abundant in some parts of Kerry. Occurs in Cork, 

 Waterford, Tipperary, Kilkenny, (at Woodstock ; Rev. S. 

 Madden). Limerick, Clare, Longford, Galway, Sligo, Leitrim, 

 Donegal, Down (Mourne mountains). Rare in the east, 

 centre, and north of Ireland. We believe that the localities 

 given for H. turibrigense in Wicklow and Dublin belong to 

 H. Wilsoni. 



2. H. Wilsoni (Hook). — WihorHs Filmy-Fern. 

 H. unilaierale (WiUd.), H. tunbrigense var. Bentham. 

 Districts 12-45--89 10 1112 

 Lat. 51°-56°. From South to North of Ireland. 

 Type in Great Britain, Atlantic, inclining to Highland. 



Moist rocky places, and on mossy trunks of trees ; frequent 

 in the mountainous districts. Fl. July to October. 



Not a common species, but much more frequent in 

 Ireland than H. tunbrigense. Especially abundant on the 

 mountains of the west and north. 



OSMUNDA Linn. 

 1, O. regalis (Linn.) — Boyal Fern. 

 Districts 123456789 10 11 12 

 Lat. 51°-56°. Throughout nearly all Ireland. 

 Type in Great Britain, British. 



Boggy and heathy places; frequent. Fl. July to 

 September. 



Plentiful in the west, from Cork to Donegal, but avoids 

 limestone. Less frequent in the midland counties; and 

 becomes rare on the eastern side of Ireland. 



