464 Proceedings of the Royal Irish Academy. 



Epvpactis latifolia, All. The Hall, Mount Charles; Ardnamona; 

 three feet high at Lough Eske Castle woods ; variable in shape 

 of leaves. 



H. palustris, Linn. Plentiful in a glade in the Ardnamona "svoods. 

 Ceflialaniliera en&ifolia, Eich. I gathered this at ArdxLaniona, where 



it was oiiginally discovered by Mrs. Brooke, of Lough Eske. 

 Allium ursinum, Linn. Lough Eske Castle woods ; Brown. Hall ; by 

 the Eanyniore water, on. the left bank below Drumagraa Bridge. 

 ^'A. l)alingto7m, Wood. Established on the coast of Inver Bay, north, 

 side. 



Juncus glmicus, Ehi'h. About Donegal, Bally shannon, Killybegs, 

 Dunkineely, Bundoran, and by the river Erne. 



J. ohiimflorus, Ehrh. By "Washpool" stream, a little north, of 

 Ballyshannon ; edges of lake north of Cavan Garden. On lime- 

 stone. 



'? Lu%ida pilosa, "Willd. Lough Eske Castle wood. I believe it was 

 this species, but the specimens gathered were withered. 



Typlia latifolia, Linn. Brown Hall, near Bundoran ; by the Eoyle, 

 near Lifford ; Lake Unshagh, near Slieve League. 



Sparganium simplex, Huds. Lake LTnshagh and Lough Eske. 



S. minimum, Fries. Lake Golagh, and other lakes west of Bally- 

 shannon ; lakes Unna, Lina, Agh, &:c., near Carrick ; Lough 

 Avehy, near Pettigo. 



Arum maadatum-, Linn. Erequent about Pettigo, Bundoran, Belleek, 

 Ballyshannon, and Donegal ; almost confined to the limestone and 

 to this part of Donegal. 



N.B. — Mr. Arthur Bennett kindly examined my pond weeds. To 

 him the following (marked A. B.) decisions are due : — 



[Potamogeton polygonifoliiis, Pourr. Piver Lennan at Eathmelton ; a 



long-leaved, usually barren form, A.B.} 

 P. rufescens, Schras. Lough Unshagh, near Slieve League, A. B. 

 P. zizii, Both. Letter river, near Pettigo, A. B. 

 iP. decipie)is, Hoth. Lono- lough, near Port Eoyal, PathmuUan, 



A.B.j 

 P. lucens, Linn. Longh Eske and river Eske ; Bundrowes river, near 



Bundoran. 

 P. perfoliatus, Linn. Erne, near Ballyshannon ; Bundrowes river, 



near Bundoran; Lough Avchy and other lakes near Pettigo; 



Islanduiore in the Foyle. 

 P. heterophyllus, Schreb. Lake Laahtowen. near Pettigo : river 



Eske. 

 P. crispus, Linn. Bradagh river, near Bundoran. 



