374 JS'AIADACEJE. IPotamogeton. 



the tMrteeatli lock, south of the Grand Canal, Kildare (J". Douglas) ; 

 and common in ditches on the bogs among the Duhlin mountains 

 (Moore): Cyh. Braganstown and Ardee bogs, Louth, 1897; 

 Praeger. — VI. In ditches in. the bog at Kilmacduagh, Galway 

 {More) ; near Portumna, Galway {Moore) : Cyl. Clonbrock river, 

 East Gal-way: Praeger i8qb. — VII. In the county "Westmeath, 

 near MuUingar, &c. {Moore) : Cyh. Scraw bog, Loughanstown : 

 Levinge iSg^. — VIII. Near Galway {Prof. Melville) ; at Eoundstone 

 {T. Kirh) : Cyl. — IX. Bog ditches near HoUymount, Mayo {More) : 

 Cyl. — XII. At MagilHgan, Derry, and not infrequent in Antrim 

 {Moore) : Cyl. Not seen recently in north-east Ireland : Flor. N.-E. 



4. P. rufesceus Schrad. — Reddish Pond-weed. 



P. alpimis Balb. 



Districts I. II. III. IV. — VI. VII. VIII. — X. XI. XII. 



Lat. 51^°- 55°. South to North. Type, British. 



Lowland. Ditches, lakes, and streams ; rare and local. M. 

 June-July. 



I. Lower Lake, Killarney ; Caragh Lake ; near Lixnaw, &c., 

 Kerry: R.W. S. i888-gi.— 11. At Blarney {P. Mills); Elbree 

 near Midleton ; and in the Blackwater at Carrigacunna {Allin) ; 

 at Buttevant ( Ca/rroll) : Allm's Cork. Corrin bog near Fermoy 

 {T. Chandlee) : Cyh. — III. Ditch near Mountrath, Queen's Co. 

 {J. Morrison) : Pee. Add. Riyer Barrow in Queen's Co. below 

 Athy ; R. W. S. — IV. Ditches on the Mun-ough of "Wicklow 

 {Moore) : Cyh. — VI. Ditches near Limerick, but not common 

 ( W. S. Survey) : Flor. Mih. Saint Senan's Lough, Co. Clare : 

 Stewart i8go. — VII. Belvidere Lake, "Westmeath {Moore) : Cyh. 

 Drain near Ballykeeran : B.SfV. 188"/. Drain from Lough Drin, 

 "Westmeath : Linton i8q6. — VIII. Near Galway {Prof. Melville) : 

 Cyl. — X. Belturbet, Cavan {Moore): Cyh. Carrick Lake, Fer- 

 managh : Stewart J882. Stream in Tynan Abbey demesne, 

 Co. Armagh : Praeger i8g3. — XL On the race-coui-se bog near 

 Londonderry {Moore) : Cyl. Lough Unshagh, near Slieve League, 

 Donegal : Ra/rt i88s y- — XTI. Enagh Lough, and in the river Roe, 

 Dei-ry {Moore) : Flor. Ml. In the Lagan canal : Flor. Ulst. 

 Ballymena, Antrim {Moore) : Cyh. ISeynj canal ; drains by 

 Magherascouse Lake, Down; and Lough Moiu-ne {Stewart); in 

 Sixmilewater at Templepatrick ( Corry) ; Glendun {Rev. S. A. 

 Brenan) : Flor, N.-F. In Burren river near Newcastle, Down : 

 S.i^P.iSgs. 



