.>. 14-] FLOWERING PLANTS AND FERNS. 49 



Frequent. Open ground, g-enerally in dry soil. Aug. — 

 Sept. 



A tall and striking grass, growing in large clumps. It 

 is of value for hay and pasturage in some localities in the 

 United States. 



SORGHASTRUM Nash. 

 Sorghastrum nutans (L.) Nash (nodding). 

 Sorghastrum avenaceum Nash. 

 Chrysopogon nutans Benth. 

 Chrysopogon avenaceus Benth. 

 Indian Grass. Wood Grass. 



Occasional or frequent. Open, usually dry ground. Aug. 

 — Sept. 



A tall grass, growing in clumps and with beautiful golden 

 brown flower-panicles. 



SORGHUM Pers. Broom Corn. Sorghum. 

 Sorghum halepense (L.) Pers. 

 Johnson Grass. 



Rare. Waterbury, in waste ground (A. E. Blewitt). 

 Aug. — Sept. Fugitive from the Old World. A cultivated 

 form of this called Kaffir Corn has been found in waste ground 

 at Hartford (H. S. Clark). 



This species is supposed to be the original of the several 

 forms of Sorghum which are cultivated for sugar-making, 

 for use in the manufacture of brooms, for forage and for their 

 seeds. 



DIGITARIA Scop. Finger Grass. 

 Digitaria filiformis (L.) Koeler (thread-shaped). 

 Panicum iiliforme L. 

 Syntherisma filiformis Nash. 

 Frequent. Dry sterile open ground. Aug. — Sept. 



Digitaria humifusa Pers. (spread over the ground; prostrate). 

 Panicum glabrum Gaudin. 

 Syntherisma linearis Nash. 

 Small Crab Grass. 



Occasional or frequent. Dry or moist fields, roadsides 

 and waste places. Aug. — Sept. Naturalized from Europe. 

 4 



