138 HALOEAGE^. {Myriophyllvm. 



MTEIOPHYLLUM Linn. 

 1. M. verticillatum Linn. — Whorled Water-Milfoil. 



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



Lat. b\f-h^\°- Throughout Ireland. Type, English. 



Lowland. Ditches, ponds, and canals ; wide-spread but local. 

 Fl, June-August. 



I. Ballyphehane Bog: Brummond 1820 — and in 1896; Phil- 

 lips. — II. In Toughal Bog, 1896, but quite rare in Cork ; Phillips. — 

 III. Barrow river near Portarlington : Ha/rt iSSj. — LV. Ditches 

 •on the Murrough of Wicklow : Moore Sf More i8'j8. — V. Ditches 

 along the banks of the [Eoyal] Canal from the Crossg^uns to 

 Soribblestown : Ir. Flor. Frequent in the Eoyal and Grand 

 Canals, Dublin, 1895; JSf. C. Old quarry holes about Eiuglass 

 Bridge: Ir. Flor. 1833— sldA in 1893; iV. C. BaUitore, Kildare 

 ( Cmrroll) : Cyl. In the Barrow below Monasterevan : Hart 1885. — 

 VI. Ballyinch Bog near Tuam : Wade Gallovid. Plentiful about 

 Limerick ( W. H. Sartiey) : Flor. Sib. Ditch by the bridge at 

 Portumna {Stewart) : Pee. Add. Eiver Suck, east of Clonbrock : 

 Praeger i8gb. — VII. Bog near Multyfambam, "Westmeath (Moore) : 

 Serb. 6-lasnevin. At the north-west end of Lough Owel : Levinge 

 i8c)4. — VIII. In small lakes by the roadside near Ballynahinch, 

 Connemara: Mack. Par. Lough Corrib, below Cam Seefin: 

 P. if 0. i8gs. — IX. Ditches near HoUymount and Lough Carra, 

 Mayo : More i860. ITeai BaUybay, Lough Eee : P.^V. i88y. 

 Lough Gara, Eoscommon ; Praeger. — X. Derrygorry Brook, Favour 

 Eoyal, Tyrone : Hart i88'j.—11. Bog holes between Derry and 

 Faiian, the only locality known in Donegal; Ha/rt. — XTT Bog 

 drains, Portmore Park \f. Whitla) : Flor. TJlst. Sparingly in a 

 muddy drain on the south side of Lough Beg (Portmore), the only 

 locality in north-east Ireland {Stewa/rt) : Flor. N'.-F. 



Var. PEciiNATmi (DC.) — YIl. Bog of Lynn, "Westmeath : 

 Levinge z8g4. 



2. M. spicatvim Liim.— Spiked Water-Milfoil. 



Districts I. II. III. IV. V. VI. VII. — IX. X. XL XIL 



Lat. 51i^°-55i°- Throughout Ireland, probably. Type, British. 



Lowland. Ponds and ditches ; frequent. Fl. June-August. 



Apparently not uncommon throughout Ireland, but frequently 

 confounded with the following species. 



