272 DAVENPORT ACADEMY OF SCIENCES. 



952. P. Crus-galli, L. Barnyard Grass. 



Common in moist waste and cultivated grounds. Especially 

 abundant in 1892. The awnless form (var. muticum, 

 Vasey.) is frequent on the banks of the Mississippi River 

 in Davenport and Muscatine. 

 Setaria, Beauv. Bristly Foxtail Grass. 



953. S. verticillata, Beauv. 



Streets and waste places of Davenport ; Muscatine, West 

 Liberty ; common. 



954. S. glauca, Beauv. 

 Common. 



955. S. viridis, Beauv. 

 Common. 



956. S. Italica, Kunth. " Hungarian." 

 A frequent escape into waste places. 



Cenchrus, L. " Sand Burr." Hedgehog Grass. 



957. C. tribuloides, L. 



Sandy soil ; common and abundant. 

 Leersia, Swartz. 



958. L. Virginica, Willd. White Grass. 

 Moist woods ; rather infrequent. 



959. L. oryzoides, Swartz. Rice Cut-Grass. 

 Marshy places ; frequent. 



960. L. lenticularis , Michx. Catch-fly Grass. 



Low grounds along Mississippi River ; common. 



Zizania, Gronov. 



961. Z. aquatica, L. Indian Rice. Water Oats. 



Shallow ponds of Muscatine Island and the Cedar River 

 region ; frequent. 

 Tripsacum, L. Gama-Grass. Sesame-Grass. 



962. 7. dactyloides, L. 



A large clump on railroad near Wyoming Hill, Muscatine 

 county. 

 Andropogon, Royen. Beard-Grass. 



963. A.furcatus, Muhl. 

 Dry prairies ; common. 



964. A. scoparius, Michx. 

 Dry soil ; common. 



