Sagittaria] 



LEMNACEiE. ALISMACE^ 



317 



23 Westmth. Portnashangan — Levinge '94^6'^. Centre f., west v. r. 



24 Longfd. Lougli Eee below Ballymalion '00 — P. 

 31 Louth Dundalk '75 (W. H. Phillips)— Stewart. 



(39 Antrim Lagan Canal ! '84, Malcomson : introduced — Fl. NF.) 



Alisma Plantago L. Water-Plantain (genus). 

 Divisions all. Common. 



Alisma ranunculoides L. 



Divisions all. Frequent. 



Sagittaria sagittifolia L. Arrow-head. 

 Census 21— East 9, Centre 10, West 2. 



8 Limrck. Limerick '99 — Somerville. 



10 Tipp. IN". Slevoir Point '96 — Colgan. Portumna — Mackayj^^. 



1 1 Kilkny Barrow at Graigue '00 — Phillips, and Ullard — Hartley. 



13 Carlow Carlo w '98— P. Barrow, frequent. 



14 Queen's Mountmellick '96 — P. Barrow and Eoyal Canal only, f. 



15 Galw. SE. "Woodford Eiver '96— Colgan. Portumna !— Phillips. 



18 King's Tullamore '96 : Eoyal Canal only, frequent — P. 



19 Kildare Athy '99, Kilcock '96— P. 



21 Dublin Clondalkin '00 — Colgan. Canals f., r. elsewhere. 



22 Meath Slane '95 : Boyne and Eoyal Canal, rare — P. 



23 Westmth. L. Deravaragh and E. Inny common — Levinge '94 484. 



24 Longfd. Longford '98 — P. Inny mouth ; Lanesborough; canal f. 



25 Eosconm. Drumsna '99 — P. Lough Key — 'Foot j2g. 

 28 SHgo Eiver at Sligo '84— B. & Y. 112. 



30 Cavan Tomkin Eoad '00 — Somerville. Widespread, rare. 



33 Perman. Devenish and Kinarla '00 — West. Very rare. 



36 Tyrone Blackwater mouth '96 — Mrs. Leebody. L. Neagh only. 



37 Armagh L. N'eagh, Blackwater, Bann, and canals, '92 — P. 



38 Down Scarva '00 — P. Eiver Lagan and ISTewiy Canal. 



39 Antrim Bushmills '87 — P. Bann basin chiefly. 



40 L'derry Bann v.f. '94-5— P. Lake above Kilrea— C;j/J. II. 



Canal traffic has no doubt assisted the spread of this plant from its 

 original home in the lakes and rivers chiefly of the centre and north. 

 Absent from some of the larger rivers, as the Lee and Blackwater, 

 ISore and Suii-, and from the great lakes of Galway and Mayo. 



