52 



GRASSES- OF IOWA. 



2. PANICUM CRUS-GALLI VAR. MUTICUM. 



Panicum crus.galli L. var. muticutn Vasey, Contr. U. S. Nat. Herb. 

 3: 37. 1892. 



• Fig. 87. Panicum Cras-yalli var. muticum — 

 a, spikelet; b, the same displayel showing glumes 

 aart pa ca. (Charlotte M. King. ) 



description. 



Awn less Barnyard 



Grass. An annual with 

 culms 2 to 3 feet (6-9 dm.) 

 high. Frequently branched 

 at the base, sheaths smooth ; 

 leaves lightly hispid on both 

 the upper and lower sur- 

 faces. Panicle dense, con 

 sisting of from 10 to 20 

 ascending branches. Spikelets 

 ovate, greenish or purple, 

 densely crowded. Glumes 

 hispid without awns. 



distribution. 



Iowa. Iowa City, Ames 

 (Hitchcock); Hawarden 

 (Pammel); Iowa City 

 (Maobride). 



North America. About 

 the same range as the species, 

 from the Atlantic states 

 along the Gulf coast, Great 

 Lakes, but more common 

 westward, Colorado, New 

 Mexico, Utah and Arizona. 



3. PANICUM WALTERI. 



Panicum Walteri Pursh. Fl. Am. Sept. 71. 26. Nash in Britton and 

 Brown. 111. Fl. 1: 113./. 244.. 1896. Scribner and Merrill. Rhodora 3: 

 127. Panicum Crus-galli var hisHdum Torr. Fl. N. Y. 2: 424. 1843. 

 Watson and Coulter. Gray. Man. Bot. 734. 1890. (6 ed.) P. hispidum Muhl. 

 Gram. 107. 1817. Beal. Grasses of N. A. 2: 119. 1896. Panicum hirtellum 

 Walt. Fl. Car. 72: 1788. 



