72 



GRASSES OF IOWA. 



description. 



Linear-Leaved Pani- 

 CUM. A slender, erect, 

 densely caespitose peren- 

 nial j to i| feet (2-4 

 dm.) high, with long, 

 linear-lanceolate, erect 



leaves and simple, open 

 panicles i\ to 4 inches 

 (5-8 cm.) long. Spike- 

 lets I to \\ lines {2-2S 

 mm.) long, obovate, ob- 

 tuse, with the 7-nerved 

 second and third glumes 

 glabrous or sparingly pi- 

 lose. Dry soils, hillsides. 



DISTRIBUTION*. 



loaa. Sioux City (A. 

 S. Hitchcock). 



North America. From 

 New England and Vir- 



FlG. 5U. Paiiicum linearifolium.—a, 6, Spikelet ■' ginia West to low a, Mis- 



e, d, e, details of flower. v Div. of Agros. U. S. Dept. . _ 



of A»ri i souri and 1 exas. 



16. PANIC UM XANTHOPHYSUM. 



Panicum xanthophysum A. Gray. Ann. Lye. N. Y. 3: 233. 1835. 

 Scribner. Bull. U. S. Dept. Agrl. Div. iVgros. 17: 103. /. j99 . 1899. Britton 

 and Brown. 111. PI. 1: 118. /. 258. Scribner and Merrill. Rhodora. 3: 108. 

 Vasey. Contr. U. S. Nat. Herb. 3: 29. Watson and Coulter. Gray's Man. 

 431. (6ed.) 



DESCRIPTION. 



SlJEKDER Paxjcl'M. A slender, or occasionally rather stout, 

 erect perennial, l to 2 feet (3-6 dm.) high, sparingly branched near the 

 base, with broadly lanceolate Leaves 2 to 6 inches (6-15 cm.) long, and 

 simple, rather few-flowered, racemose panicles 1 to 3 inches (3-8 cm.) 



