GRASSES OF IOWA. 323 



Mountain region Colorado (Steamboat Springs, Shear and Bessey), 

 Wyoming (Sheridan County, Big Goose Creek, Pammel, Stanton and 

 Crone; Bear River, Pammel, Johnson, Buchanan and Lummis 1635, 

 ami 1634), Utah (Burnt Fork, Provo River, Bear River 255, Pammel 

 and Stanton) ; Black's Fork, Pammel, Johnson, Buchanan and Lummis 

 909), Texas and Arizona to British Columbia. 



7. AGROPYRON REPENS. 



Agropyron repcns Beauv. Agros. 146. 1812. Watson and Coulter. 

 Gray. Man. Bot. 671. 1890. (6 ed.) Scn'bner. Grasses of Tenn. Bull. Univ. 

 Tenn. Agrl. Exp. Sta. 7: 123./. 17S. 1894. Shear. Bull. U. S. Dept. Agrl. 

 Div. Agros. 4: 35. 



Agropyro7i repens (L.) Beauv. Beal. Grasses of N. A. 2: 636. 1896. 

 Scribner. Bull. U. S. Dept. Agrl. Div. Agros. 7: 304. /. 298. 1900. (3ed). 



DESCRIPTION'. 



Couch Grass, Quack Grass. Culms 1 to 3 feet (2-6 dm.) 

 high, from an extensively creeping, jointed rootstock. Sheaths striate, 

 usually smooth; ligule very short; leaves 4 to 12 inches (8-24 cm.) long, 

 smooth, scabrous, or sometimes pubescent above. Spikes 3 to 10 inches 

 (6-20 cm.) long, erect. Spikelets four to eight-flowered; empty glumes 

 five to seven-nerved, obtuse 6*r notched, acute or short-awned; flowering 

 % glume nerved near the apex, awnless or sometimes short-awned. June 

 to September. See figure 228, on page 322. 



Naturalized in lawns, waysides and cultivated ground. Becoming 

 a troublesome weed in many sections of the state. The species furnishes 

 good forage, but its weedy nature should prevent its introduction as a 

 forage plant. 



distribution*. 



Ioua. Ames 153 (Ball); Macedonia 376 (Sample), Boone 

 (Carver) ; Decorah 3189 (Jacobson) ; Ames (Rolfs) ; Creston (Stew- 

 art) ; Ames 1150 (Louthan) ; Alden 1 133 (Stevens) ; Ames (Hodson) ; 

 Hamilton County (Rolfs) ; Waverly (Erwin) ; Northwood (Tenold) ; 

 Ames (Sirrine) ; Rock Rapids (Shimek) ; Jewell Junction (Carver) ; 

 Grundy Center (Miss Paddock) ; Keokuk (Shimek) ; Iowa City 

 (Hitchcock); Delaware County (Cameron); Ames (Bessey). 



North Amer'na. Widely naturalized in North America. From 

 Maine to British Columbia, New York (Parry), Connecticut (Glaston- 

 bury, Frances Wilson), Wisconsin (La Crosse, Pammel, 3231), Ne- 

 braska, Dakotas, Missouri, Colorado and the Gulf states. 



