Naias.] naiad ace^. 317 



ORDER LXXIX.— NAIADACE^. 



NAIAS Linn. , 

 1. N. flexilis (Rostk.) — Slender Naiad. 

 Caulinia JkocUis (Willd). 



District _-____-8---- 

 Lat. 53°-54°.^ "West of Ireland— Galway only. 

 Hibernian type. Not found in Great Britain. 



In shallow water in lakes ; very rare. Fl. August. 

 8. In a lake near Roundstone, Connemara, between the 

 Clifden coast road and the sea, at a mile or two from the 

 village of Roundstone ; Prof. D. Oliver. In a small lake 

 less than a mile from Roundstone, on the way to Urrisbeg ; 

 D.M. 



Discovered in Ireland by Professor Oliver in 1850. 



ORDER LXXX.— CYPERACEuE. 



SCHCENUS Linn. 



1. S. nigricans (Liim.) — Black Bog-rush. 



Districts 1 2 - 4 5 6 7 8 9 10 11 12 



Lat. 51°-56°. Throughout Ireland. 



Type in Great Britain, British. 



Bogs, heaths, moors ; frequent. Fl. June. 

 Abundant in niany parts of the north and west of Ireland. 

 Ranges from sea-level to 800 feet on Muckish, 1600 on 

 Slieve Donard {Flor. Ulst.) 



CLADIUM P. Browne. 

 1. C. Mariscus (R. Br.) — Prickly Twig-rush. 

 Districts 1 2 - 4 5 6 - 8 9 10 11 12 

 Lat. 51°-55°. Fi-om South to North of Ireland nearly. 

 Type in Great Britain, English, inclining to British. 



Margins of lakes and marshy places; rare in the east, 

 frequent in the west of Ireland. Fl. July. 



1. Frequent in Kerry and in West Cork ; /. G. Bog at 



