218 David Mooee, Ph.D., F.L.S., and A. G. More, F.L.S. 



77. Naiadacese. 



Potamogeton. 



natans. Linn. D. 



polygonifolius. Pom. D.i 

 plantagineus. Ducros. W. 

 rufescens. Schrad W. 

 heterophyllus. Schrad. D. 

 lucens. Linn. D. 



perfoliatus. Linn. D. 

 crispus. Linn. D. 



fdensus. Linn. D. 



pusillus. Linn. D. 



pectinatus. Linn. D. 



Zannichellia. 



palustris. Linn. D. 

 Ruppia. 



rostellata. Koch. D. 

 Zostera. Linn. 



marina. Linn. D. 



nana. Roth. D. 



and W. Frequent, 

 md W. Boggy places, ponds, lakes, etc. 

 Ditches near Murrough of Wicklow. 



Murrongh of Wicklow, rare (D.M.) 

 In the Liffey, &c. W 1 In the lakes % 

 Phoenix Park. (Wade.) In both 



Canals near Dublin (D.M.) 

 Liffey above Chapelizod % 

 and W. Frequent. 

 Canal at Portobello, Dublin. 



Probably conveyed by traffic from 



the West, 

 and W. Frequent, 

 and W. Local, abundant in the 



Canals and on Murrough of Wicklow. 



and W. Frequent. 



and W. Not un frequent. 



and W. Common. 

 Miid-flats, near Baldoyle. 



78. Alismacea?. 



Triglochin. 



palustre. Linn. D. and W. Frequent. 



maritimum. Linn. 



Sagittaria. 



D. and W. Frequent in muddy salt 

 marshes. 



f sagittifolia. Linn. D. In the Canals near Dublin, and along 



the Tolka, but probably introduced. 

 Alisma. 



Plantago. Linn. D. and W. Frequent, 



ranunculoides. Linn. D. and Yf. Frequent in boggy places. 

 Butomus. 



Jumbellatus. Linn. D. Elver Tolka, below Glasnevin Bridge, 



(probably escaped.) 



79. Llydrochaiidacese. 

 Hydrocharis. 



Morsus-rana?. Linn. D. Bogs of Curragha and Garristown and 



near Balruddery. 

 Elodea. 



canadensis. Rich. D. and W. Plentiful in the Canals and 



streams. 



