GRASSES OF IOWA. 



77 



DESCRIPTION. 



Wilcox's Panicum. An 

 erect, sparing^ branched pe- 

 rennial 5 to II inches ( 1.2- 

 2.8 dm.) high, papillate 

 hairy sheaths, ligule a ring of 

 hairs; lung acuminate leaves 

 ]\ to 3 inches (4-7 cm.) long, 

 pubescent with long hairs, 

 margins rough. Panicle 1 to 

 \\ inches (2.5-4 cm U)l1 ^ 

 usually compact, spreading or 

 ascending, spikelets ij lines 

 (2.5 mm.) long. Lower scale 

 with broad base about one- 

 third as long as the spikclet, 

 pubescent, second and third 

 nearly equal, pubescent. Dry 

 soil. May to August. 



DISTRIBUTION. 



Iowa. Council Bluffs, 1285 

 (Pammel), Missouri Valley, 

 3198 (Pammel), Gilbert Sta- 

 tion (Carver). 



North America. Kansas 

 northward through Nebraska, Fiq g5 p<xnicum riteoxtonuw _ a> spike lei 

 central and western Iowa, h, c, stamens aud pistil of flower. (Charlotte M. 



Dakotas and Manitoba. Klng0 



20. PANICUM LEIBERGII. 

 Panicum Leibergii Scribn. In Vasey. Bull. U.S. Dept. Agrl. Div. Bot 

 8: 32. Scribner. Bull. U. S. Dept. Agrl. Div. Agros. 17: 101. /. 397. 1899. 

 Nash in Britton and Brown. 111. Fl 3: 497. /. 259. 1896. 



Panicum scoparium var. Leibergii Vasey. Contr. U. S. Nat. Herb. 

 3: 31. 



DESCRIPTION. 

 Leiberg's Panicum. A slender, ascending, perennial grass. 

 \\ to 3 feet (3-6 dm.) high, with rather broad, Hat leaves and few- 

 flowered panicles of comparatively large, obtuse, spikelets, \\ to 2 lines 

 (3-4 mm.) long, the outer glumes papillate-pilose with stiff, spreading 

 hairs. May to July. 



Panicum Leibergii is common in meadows of central and northern 

 Iowa. First found by J. H. Leiberg in northwestern Iowa. 



