74 THE AMERICAN MIDLAND NATURALIST 



Typhaceae. Cat-tail Family. 

 Typha latijolia L. Broad-leaved Cat-tail. 

 Wet places. Frequent. June 10. 



Sparganiaceae. Bur-reed Family. 



Sparganium eurycarpum Knglem. Broad-fruited Bur-reed. 

 Wet places. Occasional at Manhattan. 



Naiadaceae. Pondweed Family. 

 Zannichellia palustris L. Horned Pondweed. 



Manhattan. In water, especially in old river channel. 

 Frequent. May 5. 



Alismaceae. Water Plantain Family. 

 Alisma Plantago-aquaiica L. Water Plantain. 



River margins, etc. Frequent. 

 Sagittaria latijolia Willd. Broad-leaved Arrow-head. 



River margins, etc. Common. Aug. 5. 

 Sagittaria ambigua J. G. Smith. 



Manhattan. Once collected, June 30. 



Gramineae. Grass Family. 

 Tripsacum dactyloidcs L. Gama Grass. 



Meadows. Occasional. June 5 (6). 

 Andropogon scoparius Michx. Little Blue-stem. 



Prairies and hillsides. Common. Aug. 10. 

 Andropogon furcatus Muhl. Big Blue-stem. 



Meadows and lower hillsides. Common. Aug. 5 (7). 

 Sorghastrum avenaceum (Michx.) Nash. Indian Grass. 



Prairies and hillsides. Common. Aug. 15 (17). 

 Sorghum halepense (L.) Pers. Johnson Grass. 



Manhattan. Fields and roadsides. Occasional. 

 Paspalum ciliatij olium Michx. 



Manhattan. Frequent in sandy soil. 

 Eriochloa punctata (L.) W. Hamilt. 



Manhattan. Once collected in street. 

 Syntherisma linearis (Krock.) Nash. Small Crab Grass. 



Dry fields. Frequent. July 20. 

 Syntherisma sanguinalis (L) . Dulac. Large Crab Grass. 



Fields. Common. June 30 (28). 

 Echinochloa Crusgalli (L.) Beauv. Barnyard Grass. 



Fields, especially in low places. Common. June 15. 



