300 GRASSES OF IOWA. 



North America. Colorado (Larimer Count}, Pammel), Wyo- 

 ming (Sheridan Count}-, Pammel 96, 51, 148), Arizona, California 

 ( Donner Lake, Pammel), Washington (Sandberg and Leiberg 450), 

 to Alberta. 



12. BROMUS MARGINATUS VAR. LATIOR. 



Bromus mi rginatus latior Shear. Bull. U. S. Dept. Agrl. Div. Agros. 

 23: 55. 1900. 



DESCRIPTION'. 



Larger Short Awned Chess. A larger and stouter plant than 

 the species, sometimes reaching 8 or 9 feet (17 or 18 dm.) high. Pan- 

 icle larger, 1 to l| feet (2-3 dm.) long, with longest, lower branches 

 5 to to inches (10-20 cm.) long, awn usually slightly longer, sometimes 

 reaching 3 or 3^ lines (6 or 7 mm.). Otherwise like the species. See 

 Fig. 210 on page 299. 



DISTRIBUTION. 



Iowa. Ames i,^, and 148 (Ball; see Shear, Bull. U. S. Dept. Agrl., 

 Div. Agros. 23 :55). 



North America. New Mexico, Colorado, Utah, Arizona, Wyo- 

 ming, Idaho, Washington, Oregon and California; also in northern 

 i Jnited States. 



13. BROMUS CARINATUS. 



Bromus carinattis Hook, and Arn. Bot. Beech. Voy. Suppl. 403. 1841. 

 Shear. Bull. U. S. Dept. Agrl. Div. Agros. 23: 59. /. 37. 1900. 



Bromus Hookerianus minor Scrib. Beal. Grasses of N. A. 2: 614. 

 1896. 



DESCRIPTION. 



Keeled Brome. An annual or biennal, with erect culm, linear 

 leave-;, and erect or suberect panicle. Culm about 2 to 3 feet (5-8 dm.) 

 high, slightly pubescent at the nodes, retrorsely soft pilose; ligule I-J to 

 2 lines (3-4 mm.) long, sublaciniate ; blades flat, mostly narrow, about 

 ■'. to 1 foot (1-2.5 dm.) long, \\ to 3 lines (3-6 mm.) broad, thinly pilose 

 on both sides. Panicle pj ramidal, somewhat lax, about § to 1^ feet ( 1.5- 

 .-;.=; dm.) long; lower branches about 3, spreading or somewhat drooping. 

 Spikelets lanceolate to suboblong-lanceolate, compressed, about 1 to 1 ' 

 lines (2.5-3 cm.) long, and l\ lines (5 mm.) broad, five to nine-flow- 

 ered ; empty glumes lanceolate, acute, glabrous to slightly scabrous pubes- 



