io3 

 SCHEUCHZERIACE^ — Arrow-Grass Family 



Triglocliin palustris, L. Marse Arrow-grass. 

 In bogs in the Minnesota Valley. 



Trigloc'hiii luaritiina, L. Seaside Arrow-grass. 

 In marshes throughout the state. 



AuSMACE^. — Water-Plantain Family. 



Alisina plaiitago-aqiiatica, L. Water-plantain. 



Common in the edges of lakes and streams through- 

 out the state. 



Echiiiodorus cordifolius, (L.) Griseb. Upright Bur- 

 head. 



Occasional in the southeastern corner of the state, 

 Sioux Falls; Yankton. 



Lophotoearpus calyciuus, (Engelm.) J. G. Smith. Lo- 

 potocarpus. 



Occasional in swamps from the Missouri river east- 

 ward. 



Sag'ittaria arifolia, Nutt. Arum-leaved Arrowhead. 



In the Minnesota and James valleys and in the Black 

 Hills. 



Sag-ittaria graiiiiiiea, Michx. Grass-leaved Sagittaria. 

 In shallow waters from the Missouri valley eastward. 



Sag-ittaria latifolia, Willd. Broad-leaved Arrowhead. 

 In shallow water throughout the state. 



Vallisneriace^. Tape-Grass Family. 



Phllotria Canadensis, (Michx.) Britton. Waterweed, 

 Ditch moss. 

 Elodea Canadensis^ Michx. 



In the Minnesota and Sioux river valleys. 



Vallisneria si)iralis, L. Tape-grass. Ell-grass. 

 In Big Stone lake, in the Minnesota valley. 



