FLOWERING PLANTS AND PERNS OF INDIANA. 623 



that time the furnace shut down, the pond soon after drying up. 

 The plant is probably no longer a member of our flora. 



Flowers from July through Sentember. In the station mentioned 

 specimens in fruit were collected in April. 



Vigo (Coulter). 



NAIAS L. 



N. flexilis (Willd.) Rost. and Schmidt. 



In the lower Wabash and in the pools and swamps adjoining. 

 Not uncommon, but nowhere abundant. 

 Flowers in June and July. 



N. gracillima (A. Br.) Morong. 



I N. Indica gracillima A. Br.) 

 In pools and shallow, still waters in the southwestern counties. 

 The species occurs sparingly in a few stations and has been rarely 

 collected. 



Flowers in July and August. 

 Gibson (Schneck). 



SCHEUCHZERIACE.E. Arrow-grass Family. 



TRIGLOCHIN L. 



T. palustris L. Marsh Arrow-grass. 



In bogs and swamps in the northern part of the State. It prob- 

 ably does not extend southward in the State to any great extent. 

 Flowers in July and August. 

 Lake (Hill). 



T. maritima L. Seaside Arrow-grass. 



Found in marshes and cold bogs in the northern counties. Rec- 

 ognized as a member of the State flora by E. J. Hill. 

 Flowers in July and August. 

 Lake (Hill). 



SCHEUCHZEIUA L. 

 S. PALUSTRIS L. 



In the central and northern counties in marshes and bogs. Es- 

 pecially abundant in cold peat bogs. 

 Flowers from June through August. 

 Cass and Marshall (Hessler). 



