TLA NTS OF IOWA 129 



Sorghum, Pers. 



1596. S. halepense, (L.) Pers. Johnson Grass. 

 Introduced from Southern Europe. 



Paspalum, L. 



1597. P. ciliatifoliiim, Michx. Ciliate-Leaved Pasalum. 

 Sandy soil, not common. 



Syntherisma, Walt. 



1598. 8. linearis, (Krock.) Nash. Small Crab-Gra^ 

 Common on banks of lakes and streams. 



1599. S. sanguinalis, (L.) Dulac. Large Crab-Graa 

 Introduced in waste ground. 



1600. 8. filiformus, (L.) Nash. Slender-finger Grass. 

 Infrequent, dry hillsides. 



Echinochloa, Beauv. 



1601. E. crus-gaUi, (L.) Beauv. Barnyard Grass. 

 Introduced. Common. 



1602. E. walteri, (Pursh.) Nash. Salt-marsh Cockspur Grass. 

 Not common. 



Panicum, L. 



1603. P. capillare, L. Witch Grass. 

 Common. 



1604. P. cognatum, Schultes. Diffuse Panicum. 

 Infrequent, on sandy soil. 



1605. P. miliaceum, L. Millet. 



In waste places, introduced from the Orient as a culti- 

 vated grass. 



1606. P. proliferum, Lam. Spreading Panicum. 

 Common on road-sides. 



1607. P. virgatum, L. Tall Smooth Panicum. 



Sandy soil, common along streams, and near lakes. 



1608. P. depauperatum, Muhl. Starved Panicum. 



In dry places, woods and gravelly soil ; not common. 



1609. P. enslini, Trim Linear-Leaved Panicum. 

 Dry soil, infrequent. 



1610. P. diclwtomum, L. Forked Panicum. 

 Common in meadows and open woods. 



