Isoetes.] LTCOPODTACE^. 381 



ORDER LXXXV.— LYCOPODIACE^. 



ISOETES Linn. 

 1. I. lacustris (Linn.) — Quill-wort. 

 Districts 1--4---8-10 1112 

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

 Type in Great Britain, Highland. 



In shallow water, on the margins of lakes, chiefly in 

 mountainous districts ; frequent. El. June to September. 



Frequent in the west and north of Ireland. Occurs in 

 Kerry, Cork, Wicklow, Galway, Monaghan, Tyrone, Armagh, 

 Donegal, Derry, Antrim, and probably in some other counties. 



I. echinospora (Dur.) 

 District 1 -------_-__ 



Rare. 1. Lakes near the Gap of Dunloe, Killarney ; and 

 in the upper lake of Killarney, near Glenagh Cottage ; D. M. 

 Our specimens have been examined by Alexander Braun, 

 who refers them without any doubt to /. echinospora, although 

 the Kerry plant is much larger than that found in Caernar- 

 vonshire by Prof. C. C. Babington. 



L7C0P0DIUM Linn. 



1. Ii. clavatum (Linn.) — Common Clvb-mass. 

 Districts 12 -45--89 10 1112 

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

 Type in Great Britain, British. 



Heaths, moors, and mountains ; local. Fl. July to October. 



By no means a common plant in Ireland. " Plentiful in 

 the southern baronies of Kerry;" Smith, but rare in the south 

 and south-west. Is reported from South and North Cork, 

 Tipperary, Waterford, Wicklow, Dublin, Connemara, Sligo 

 (rare), Tyrone, Donegal, Derry, and Antrim. 



2. L. alpinum (Linn.) — Mountain Clvb-moss. 

 Districts 1 - - - 5 - - 8 9 10 11 12 

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



Type in Great Britain, Highland. 



