74 



GRASSES OF IOWA. 



long. Spikelets obovoid, obtuse, about 1.5 line (3 mm.) long, the second 

 and third glumes pubescent. Dry, sandy soil. June to September. 



DISTRIBUTION. 



Iowa. The species has not been found in the state, although re- 

 corded in Gray's Manual and Britton and Brown's Illustrated Flora. 



North America. In dry soil, Quebec to Pennsylvania, west to 

 Minnesota and Manitoba. 



17. PANICUM MACROCARPON. 



Panicum macrocarpon Le Conte. Torr. Cat. 91. 1819. Nash, in 

 Britton and Brown. 111. Fl. 1: 117. f. 256. Scribner and Merrill. Rhodora. 3: 

 111. Most of the Iowa material has usually been referred to P. latifolium Walt. 



/ 



Fig. 62. 

 Panicum zanthophyaum. 

 (Charlotte M. King.) 



Kic. 53, 

 Panicum macrocarpon. 



(Charlotte M. King. ) 



