332 HTDKOCHAEIDE^. [Modea, 



MONOCOTYLEDONES. 



OEDEE LXIV.— HYDROCHARIDE^. 



ELQDEA Micks. 



1. *E. canadensis Miokx. — Wafer Thyme. 



Anachwris Ahinadrum Bab. 



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



lat. 51|°-54f°. Througliout Ireland. 



Lowland. Canals, ponds, lakes, and ditches, usually in still or 

 slo-w waters ; frequent and locally abundant. Fl. July-August. 



I. Sparingly in tbe river at Listowel, Kerry, 1897, the only 

 locality so far known in the county; R.W. S. Ballyphehane bog 

 {Carroll): Allin's Corh — and in 1896; PhilUps. — II. A great 

 nuisance in the river Lee where it. was introduced in 1851 {Prof. 

 Mv/rphy): Cyh. Still plentiful in the Lee, 1896; Phillips. Ponds 

 near Blarney (iS. Mills) ; in the river in Castlemartyr demesne : 

 AlWs Cork. — III. Plentiful ia the river [Barrow] at Carlow 

 {■Cmrroll) : Cyl. In the Barrow near Portarlington and opposite St. 

 MuUin's, Kilkenny: Hart 1885. — IV. Ponds at Hollybrook, Bray 

 {Barrington) : Peo. AM. Eiver Slaney near Enniscorthy, Wexford : 

 Ha/rt 1881a.. Pond at Castleboro, Wexford: B.-E.SfM. iSga.— 

 V. Abundant in the canals near DubUn : Cyh. 1866 — and in 1898 ; 

 P. W. 8. Abundant in the LifEey river, 1893 ; also in bog drains 

 at Garristown, where it was inti'oduced from Lough Erne about 

 1873; frequent in ponds and quarry holes ia Co. Dublin; N. C. 

 Pond at Barmeath, Louth : Butler i8qo. — VI. In Lough Derg, at 

 Portirmna and Mount Shannon, Co. Gralway, and near Killaloe, Co. 

 Clare, 1896, but not abundant and said to have much decreased of 

 late : N. C. i8q'j. — VII. Has spread from the Dublin canals to the 

 river Shannon: Cyl. Lough Ennel; Lough Derevaragh, &c., 

 Westmeath : Levinge i8g4. Eiver Inny, Lough Eee ; Shannon at 

 Athlone, &c., said to be disappearing : B.SfV. 188'j. — VIII. Abun- 

 dant in Loughs Corrib and Mask : M.^ k. i8gb. Introduced into 

 Lough Corrib about 1861 ; Miss M. F. Jackson. — IX. In Lough 

 Allen : Stewa/rt 1885. In Lough GiU river, Sligo : B.^V. 1885 



