GRASSES OF IOWA. 



71 



14. PANICUM PERLONGUM. 

 Panicum perlongum. Nash in Britton Man. 1040. 1901, 



DESCRIPTION. 



Slender Panic Grass. A slender, 

 caespitose, hairy perennial, \ to i\ 

 feet (2-4 dm.) high, hirsute sheaths 

 with long, linear, erect papillose- 

 hispid leaves, simple, open, exserted 

 panicles 2 to 4 inches (4-O cm.) long, 

 extending beyond the upper leaf. Lower 

 panicles short, spikelets about 1.5 lines 

 (3.25 mm.) long and less than 1 line 

 (1.5-1.75 mm.) wide, pubescent with 

 a few scattered long hairs. Prairies 

 and dry soil. May to August. 



DISTRIBUTION. 



Iowa. Iowa City (Hitchcock); 

 Vinton (Davis); Ames, 145 (Ball), 

 cited in original description. Regarded 

 as P. depauperatum by Ashe; Waterloo 

 (Hitchcock). 



North America. Illinois, Iowa, to 



Fig. 4J. Panicum j>erlungum.—a, 

 South Dakota, south to Indian Tern- Part of node showing sheath and ligule: 



b, spikelet; c, e, parts of spikelets dis- 

 t0r - 7, played. (Charlotte M. King.) 



15. PANICUM LINEARI FOLIUM. 



Panicum lineari folium Scribn. Bull. U. S. Dept. Agrl. Div. Agros. 

 11: pi. 1. 1898. Britton and Brown 111. F1.3: 500. /. 268. A. Scribner and 

 Merrill. Rhodora 3: 108. 



Panicum ens lint Trin. Man. Nees. Agros. Bras. 2: 227. 1829. Scrib- 

 ner. Bull. U. S. Dept. Agrl. Div Agros. 17: 88. f. 3S4. 1899. 



Panicum depauperation var. laxa. Vasey Bull. Div. Bot. U. S. Dept. 

 Agrl. 8: 29. 



