652 EEPOET OF STATE GEOLOGIST. 



E. olivacea Torr. Bright Green Spike-rush. 



In marshes in the southwestern part of the State. The species in 

 its mass distribution is near the coast, and its occurrence in our area 

 is exceptional. 



Flowers in August and September. 



Gibson (Schneck); Lake (Hill). 



E. capitata (L.) R. Br. 



In wet soils in the southern counties of the State. Abundant in 

 favorable situations. 



Flowers in our area in July and August. 

 Vigo (Blatchley); Lake (Hill). 



E. oyata (Roth.) R. and S. 



Found throughout the State in wet soil, usually somewhat sandy 

 or clayey. Very abundant and very variable. It is also often 

 found in shallow water, at the margins of ponds and ditches. 



Flowers from June through September. 



Tippecanoe (Cunningham) ; Kosciusko (Chipman) ; Jefferson 

 (Barnes) ; Noble (Van Gorder) ; Vigo (Blatchley) ; Hamilton 

 (Wilson) ; Steuben (Bradner). 



E. Engelmanni Steud. 



Found somewhat sparingly in various counties of the State, grows 

 in wet soil and occasionally found in shallow water. 

 Flowers in July and August. 

 Putnam (MacDougal). 



E. palustris (L.) R. and S. Creeping Spike-rush. 



Found in marshes and the shallow waters of ponds and lakes in 

 the northern counties. Plentiful in stations in which it is found. 

 Flowers in August and September. 

 Laporte (Barnes). 



E. acicularis ( L.) R. and S. Needle Spike-rush. 



In low, muddy places about ponds and streams. Well dis- 

 tributed, but never abundant. 

 Flowers in July and August. 

 Laporte (Barnes) ; Vigo (Blatchley) ; Steuben (Bradner\ 



E. melanocarpa Torr. 



In wet sands in or near the southern shores of Lake Michigan. 

 Not found far removed from the lake. 

 Flowers in July and August. 

 Lake and Laporte (HilH. 



