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Lisburn and Moira, Down ; S. A. Stewart, 1866. This is an artificial 

 cut, and the plant does not grow in Lough Neagh, nor in the river 

 whence the Lagan Canal is drawn. Dr. Patrick Browne, in 1788, was 

 aware of its occurrence in the county of Down, but does not give any- 

 special locality. According to the best authorities, Acorus Calamus is 

 nowhere native in the west of Europe. 



Potamogeton rufescens (Schrad.)— 2. Plentiful in the Blackwater at 

 Buttevant ; Eev. T. Allin. District 3. Ditch near Mountrath, Queen's 

 County ; J. Morrison. 



P. polygonifolius (Pourr.) Var. with long, thin, narrowly-lanceolate 

 submerged leaves ; var. pseudo-fluitam (Syme.) — 8. Plentiful in lakes 

 and streams at Ballinahinch, Connemara ; A. G. M. This is the plant 

 doubtfully given in our book as P. lanoeolaius, and is very characteristic 

 of streams connected with lakes in mountainous districts. The long 

 submerged leaves are very like those of P. sparganiifolius. 



P. LonoUUs, " Tuck" (Syme), in " English Botany." District 5. 

 In the Boyne below If avan. By this name Doctor Syme designates the 

 Potamogeton from the Boyne, which we have doubtfully referred to P- 

 heterophyllus. 



P. luoens (Wulf). District 7. In the Brosna, near Parsonstown ; 

 M. Dowd. Var.deoipiens {'Solte.) District 5. In the Canal at Navan; 

 Charles Bailey, 1868. 



P. crispus (Linn.) District 11. Kindrum Lakes, Fanet; H. C. 

 Hart. 



P. gramineus (Linn.) P. oMusifolius (M. et K.) — 2. Bogs near 

 Toughal and Charleville, and in Ballybutler Lake, Cork; Kev. T. 

 Allin 10. Near Drum, Clones; J. Bain. 



P. pusiUus (Linn.) District 7. Common near Parsonstown ; M. 

 Dowd. District 10. Strabane Canal and Ballymagorry, Tyrone ; Dr. 

 Sigerson. District 11. Kinlough, Panet; H. C. Hart. 



P. pectinatus (Linn.) District 6. Aran Island; H. 0. Hart. 



Zanniohellia palmtris {JAmx.') District 11. Glen Head, Donegal; 

 H. C. Hart. 



Nadas flexiUs (Eostk.) — 8. In 1869, 1 found it only in Lough Creg- 

 duff, three-quarters of a mile west of Eoundstone, and it is probable 

 that this is the same lake in which Prof. Oliver discovered it, 

 and the only locality yet found in Ireland ; A. G. M. 



Schanus nigricans ^Linn.) District 3. Black Bog and Sandbrook 

 near Ballon, Carlow ; K. Clayton Browne. 



CladiumMariscus (R.Br.) Districts. Black Bog near Carlow, and 

 Ardristan Bog near Tallow ; R. Clayton Browne. 



Meooharis uniglumis (Link.) — 4. On the sandhills near Arklow ; A. 

 G. M. District 5. On the shore east of DoUymount, opposite the North 

 Bull, Dublin; M. Dowd. District 12. Shore half a mile below Ban- 

 gor, Down; S. A. Stewart. 



E. multieauUs (Sm.) District 10. Near Drum, Clones; T. Bain. 



Scirpus sylvaticus (Linn.) — 2. Banks of the Owley River near Kil- 

 comer; Rev. T. Allin. — 12. Deer Park, Glenarm ; R. Tate. 



