8o UNIVERSITY OF MISSOURI STUDIES [228 



180. S. lacustris L. Great bulrush. 



With the preceding but often in water of greater depth, 

 and penetrating farther back into the mountains, 5100-S600 

 ft. (Daniels, 414). 



Throughout the North Temperate Zone. 



1S1. S. atrovirens pallidus Britton. Pale bulrush. 



Swales, ditches and streams in the plains and mesas, and 

 ascending but slightly into the foot-hills, 5100-6000 ft. 

 (Daniels, 490). 



Minnesota to the Northwest Territory and Colorado- 



80. ELEOCHARIS R. Br. Spike rush. 



182. E. palustris (L.) R. & S. Swamp spike rush. 

 Common in swamps, swales, and stagnant pools through- 

 out, 5100-10000 ft. (Daniels, 492). 



North America: Europe: Asia. 



183. E. glaucescens (Willd.) Schultes [E. palustris glauccs- 

 cens (Willd.) Gray]. Pale swamp spike rush. 



Common with the above, but in shallower water, 5100-9000 

 (Glacier Lake, Eldora) ft. (Daniels, 733). 

 Ontario and the United States. 



184. E. ccicularis (L.) R. & S. Needle rush. 



Common in limose places throughout, 5100-10000 ft. 

 (Daniels, 254). 



Europe: Asia: North America: Central America. 



184 */>. E. tenuis (Willd.) Schult. Slender spike rush. 

 Redrock lake, 10100 ft. (Ramaley and Robbins). 

 Newfoundland to Manitoba; Florida to Colorado. 



185. E. acuminata (Muhl.) Nees. Flat-stemmed spike rush. 

 Ditches and swales in the plains, 5100-5600 ft. (Daniels, 



734>- 



Anticosti to Alberta; Georgia to Louisiana and 

 Colorado. 



