io8 

 SCHEUCHZERIACE^ Arrow-Grass Family 



Triglochiii palustris, L. Marse Arrow-grass. 

 In bogs in the Minnesota Valley. 



Triglochiii maritima, L. Seaside Arrow-grass. 

 In marshes throughout the state. 



AUSMACE^. Water-Plantain Family. 



Alisma plaiitago-aquatica, L. Water-plantain. 



Common in the edges of lakes and streams through- 

 out the state. 



Echinoclorus corclifolius, (L.) Griseb. Upright Bur- 

 head. 



Occasional in the southeastern corner of the state, 

 Sioux Falls; Yankton. 



Lophotocarpus calycinus, (Engelm.) J. G. Smith. Lo- 

 potocarpus. 



Occasional in swamps from the Missouri river east- 

 ward. 



Sagittaria arifolia, Nutt. Arum-leaved Arrowhead. 



In the Minnesota and James valleys and in the Black 

 Hills. 



Sagittaria graminea, Michx. Grass-leaved Sagittaria. 

 In shallow waters from the Missouri valley eastward. 



Sagittaria latifolia, Willd. Broad-leaved Arrowhead. 

 In shallow water throughout the state. 



VALLISNERIACE.E. Tape-Grass Family. 



Philotria Caiiatlensis, (Michx.) Britton. Waterweed, 

 Ditch moss. 

 Elodea Canadensis, Michx. 



In the Minnesota and Sioux river valleys. 

 Vallisiu'ria spiralis, L. Tape-grass. Ell-grass. 

 In Big Stone lake, in the Minnesota valley. 



