GRASSES OF IOWA. 347 



leaves 6 to 8 inches (12-16 cm.) Long, pubescent on the upper surface, 

 scabrous on the margins. Spikes 2 to 4. inches (4-8 cm.) long; rachis 

 villous. Spikelets one to three- flowered, pilose hairy; empty glumes awl- 

 shaped, awn-pointed, one to three-nerved, two to three times the length 

 of the florets; flowering glumes 3 lines (b mm.) long. July to August. 

 Elymus striates is ct mmon in low woods, in many pans of the state. 



DISTRIBUTION. 



Iowa. Ft. Dodge (Oleson) ; Mt. Pleasant 191 8 (Mills) ; Kos- 

 suth County 852 (Cratty) ; Lucas County (Shepperd) ; Clear Lake 26 

 (Shimek) ; Monticello (Bessey) ; Winterset, Boone, Des Moines, In- 

 dianola (Carver) ; Battle Creek 959 (Preston) ; Lebanon 23 (Ball and 

 Sample); Clinton (Ball); Sioux City, Cherokee (Wakefield); Ames 

 Crozier; Carver, Ball 166, Fisher, Zmunt, Rich and Gossard, C. A. 

 Wilson, F. R. Wilson, Hitchcock) ; Council Bluffs, Webster City, 142(1 

 Carroll, 192b New Albin, Jefferson, 1040 Sioux City, Houston, Iowa- 

 Minnesota line (Pammel). 



North America. Maine to Illinois (Fast St. Louis, Eggert), Wis- 

 consin (Lake Geneva, Ball), South Dakota, Nebraska (Alma, Pam- 

 mel), Missouri (St. Louis, Eggert; Washington, Pammel), Tennessee, 

 Arkansas, Texas and Wyoming (Devil's Tar, Griffith 540). 



6. ELYMUS STRIATUS VAR. BALLII. 

 Elymns striatus Willd var. Ballii Pammel 



DESCRIPTION. 



Ball's Slender Lyme Grass. Stems erect, slender, single, 2 to 

 3 feet (5-8 dm.) high, with bristly, heavy spikes. Sheaths hairy or the 

 upper smooth, spikes like the preceding, empty glumes more hirsute than 

 the species. Approaches E. australis. July-August. See figure 24b, on 

 page 34b. 



DISTRIBUTION. 



Iowa. Muscatine (Reppert) ; Ames (Hitchcock) ; Johnson County 

 (Fitzpatrick) ; Ames (C. A. Wilson) ; Keokuk (P. H. Rolfs). 

 North America. Illinois to Missouri and Iowa. 



7. ELYMUS STRIATUS VAR. V1LLOSUS. 

 Elymus striatus var . villosus Gray. Man. 603. 1848. 



