76 



GRASSES OF IOWA. 



Panicum Porterianum Nash, in Britton and Brown. 111. Fl. 1: 117. 

 / 254. 1896. Bull. Torr. Bot. Club. 22: 420. 1895. 



Panicum Walteri Poir. in Lam. Encycl. Suppl. 4: 282. 1816. Scribner 

 Grasses of Tenn. Bull. Univ. Tenn. Agrl. Exp. Sta. 7:47. /. 45. 



DESCRIPTION. 



Porter's Panicum. A rather 

 slender, branching perennial, l to 

 2 feet (3 to dm.) high, with 

 broad, ovate-lanceolate leaves, and 

 few-flowered, nearly simple pan- 

 icles. Spikelets ovate-elliptical or 

 pear-shaped, obtuse, about 2 lines 

 (4 mm.) long, outer glumes 

 shortly pubescent. Common in 

 open woodlands and thickets. May 

 to October. 



DISTRIBUTION. 



lou'a. Cedar Rapids (Hitch- 

 cock) ; Unionville (Shimek). 

 North America. Maine, Ontario 

 to Minnesota southward to Flor- 

 ida and Texas. 



Pro. 54. Panicum latifolium—a., h, c, 

 spikelets. (Div. of Agros. U. S. Dept. Agrl. ) 



19 PANICUM WILCOX1ANUM. 



Panicum Wilcoxianum Vasey. Bull. Div. Bot. U. S. Dept. Agrl. 8: 

 32. 1889. Scribner. U. S. Dept. Agrl. Div. Agros. 17: 95. /. 391. Britton and 

 Brown. 111. Fl. 1: 119. /. 260. 



