126 Guide to Belfast. 



Festuca rottboellioides Kunth. — In both counties; 

 not common. 



F. sylvatica Vill. — D., Newcastle, Rostrevor; A., very 

 rare, and not seen recently. 



Bromus racemosus Z. — D., Holywood, Rathfriland; 

 A., frequent. 



Agropyron acutum R. and S. — D., Ballyhornan ; 

 A., Red Bay. 



Hordeum secalinum Schreb. — D. and A., about 

 Belfast ; now nearly extinct. 



Hymenophyllum tunbridgense Smith. — A., Glen- 

 dun. 



Cryptogramme crispa R. i?r.— Mourne and Antrim 

 mountains, very rare. 



Lastrea Thelypteris Presl. — A., Portmore, Bally- 

 clare ; not seen recently. 



L. semula Brack. — Frequent in both counties. 



Polypodium Dryopteris L. — A., Knocklayd; not 

 seen since first discovered over sixty years ago; extremely 

 rare in Ireland. 



E. pratense Ehrh. — A., in a number of stations. 

 Elsewhere in Ireland found in Donegal only. 



Equisetum hyemale L. — D. and A., local and rare. 



E. trachyodon Braun. — A., Colin Glen, Glenarm, 

 Glenariff. In eight Irish and one Scotch county. 



Lycopodium alpinum L. — Mourne and Antrim moun- 

 tains. 



Isoetes lacustris L. — D., south half, rare ; A., wide- 

 spread, rare. 



Pilularia globulifera L. — Lough Neagh and Portmore. 

 Not seen in our district since Lough Neagh was drained. 

 Very rare in Ireland. 



Chara aspera Willd. — In both counties, rare. 



C. polyacantha Braun. — D., Tyrella. 



C. contraria Kuetz. — D., Clandeboye Lake. 



Nitella translucens Ag. — In both counties, rare. 



Ferns are so favourite a group that some details as to the 

 fern flora may be of interest, especially since special attention 

 has been paid in the district to the extraordinary sports to 



