134 WHERE TO FIND FERNS. 



hood of Maentwrog). In Scotland, in the counties of 

 Argyle, Dumbarton, Dumfries, Peebles, Renfrew, Ross, 

 and Stirling. The following are the localities of these 

 counties : In Argyleshire, Bullwood, Dunoon, and 

 Glen Gilp. In Dumbartonshire, shores of Loch 

 Lomond. In Dumfriesshire, Drumlanrig ; and in 

 Lanarkshire, banks of River Clyde. It is also found in 

 the islands of Bute and Mull. In Ireland, in the 

 counties of Clare, Cork, Dublin, Galway, Kerry, and 

 Wicklow, the subjoined being the localities. In the 

 county of Clare, Feacle. In Cork, Ballenhassig 

 Waterfall, Dunbullogue Glen, Glenbower, Glengariff, 

 Killeagh, and Lota Wood. In the county of Dublin, 

 in the neighbourhood of the capital. In Galway, 

 Ballynahinch and Connemara. In Kerry, in Glen 

 Carnn and the vicinity of Killarney. In the county of 

 Wicklow, Glencree. Hymenophyllum tunbridgense is 

 found at various elevations, extending to about a 

 thousand or twelve hundred feet above the sea-level. 



XLIX. THE ONE-SIDED FILMY FERN. 

 Hymenophyllum jinilaterale. 



(Plate XV., Fig. 6, page 77.) 



LENGTH OF FROND. One to six inches, the maxi- 

 mum length being exceptional, and the average seldom 

 exceeding two or three inches. 



GENERAL DESCRIPTION. Roots very fine, wiry, 

 fibrous, and abundant. jRootstock, a slender, hairlike, 

 brownish-black rhizoma, which, like that of Hymenophyl- 

 lum tunbridgense, creeps extensively along the rocks or 

 shallow soil on which it grows, forming frequently, with 

 the roots, dense, compact clusters, which are often 



