228 



POACEAE 



5. Bromus polyanthus Scribn. 



Great Basin Brome-grass. 



Fig. 534. 



Bromus multiflonis Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 

 13: 46. 1898, not Weig. 1772. 



Bromus polvanthus Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 

 23: 56. /. 34. 1900. 



Perennial ; culms stout, 60-100 cm. tall ; sheaths 

 smooth ; ligule about 2 mm. long ; blades scabrous ; 

 panicle erect, the branches erect or slightly spread- 

 ing; spikelets 3-3.5 cm. long, compressed, 7-11-flower- 

 ed ; glumes smooth or somewhat scabrous ; lemmas 

 smooth or scabrous, 13-15 mm. long, the awn 4-6 mm. 

 long. 



Woods and banks, in the Arid Transition Zone; eastern 

 Washington and Oregon to Montana and Colorado. July-Aug. 

 Type locality: Wyoming. 



6. Bromus marginatus Nees. 



Large Alountain Brome-yrass. 



Fig. Dc>h. 



Bromus marginatus Nees; Steud. Syn. PI. Glum. 1: 322. 1854. 

 Bromus breviaristatus Buckl. Proc. Acad. Phila. 1862: 98. 

 1863, not Ccratochloa breviaristata Hook. 1840. 



Short-lived perennial ; culms rather stout, 60-120 

 cm. tall ; sheaths pilose ; blades broad, flat, more or 

 less pilose ; panicle erect, rather narrow, 10-20 cm. 

 long, the lower branches erect or somewhat spread 

 ing ; spikelets 2.5-3.5 cm. long, 5-7 mm. wide, 7 or 

 8-flowered ; glumes broad, scabrous, or scabrous-pu- 

 bescent, the first subacute, 3-5-nerved, 7-9 mm. long, 

 the second obtuse, 5-7-nerved, 9-11 mm. long; lem- 

 mas subcoriaceous, coarsely pubescent, ovate-lanceo- 

 late, acute, 11-14 mm. long; awn 4-7 mm. long. 



Open ground, open woods, roadsides, and waste places, in 

 tlie Transition Zone; British Columbia to southern California, 

 and Alberta. Tune-Aug. Type locality: Columbia River. 



Bromus marginatus seminvidus Shear, U. S. Dept. Agr. Div. 

 Agrost. Bull. 23: 55. 1900. Sheaths glabrous; plant often 

 tall and stout with large spreading jjanicle. Woods or near 

 streams. Transition and Canadian Zones; mostly from 3000- 

 9000 feet altitude, British Columbia to the San Jacinto Moun- 

 tains, east to Colorado. Tyi)e locality: Wallowa Lake, Oregon. 



Bromus marginatus latior Shear, U. S. Dept. Agr. Div. Agrost. Bull. 23: 55. 1 

 with pubescent sheaths and large panicles, the lower branches spreading, as much 

 the species. Type locality: Walla Walla, Washington. 



900. A 

 as 20 c 



tall stout 

 m. long. 



form 

 With 



7. Bromus carinatus Hook. & Arn. 

 California Brome-grass. Fig. 536. 



Bromus carinatus Hook. & Arn. Bot. Beechey Voy. 403. 

 1841. 



Perennial or annual; culms 60-100 cm. tall; 

 sheaths pilose ; blades narrow, flat, more or less 

 pilose ; panicle pyramidal, rather lax, the lower 

 branches spreading or drooping; spikelets about 

 2.5 cm. long, 5 mm. wide, 5-9-flowered ; glumes 

 lanceolate, acute, glabrous or slightly scabrous- 

 pubescent, the first 3-nerved, 7-9 mm. long, the 

 second 5-nerved, 9-11 mm. long; lemmas lanceolate, 

 puberulent or short-pubescent, 13-16 mm. long; awn 

 7-10 mm. long. 



Open ground, open woods, roadsides, and waste places. 

 Upper Sonoran and Transition Zones; British Columbia to 

 southern California and Idaho. June-Aug. Type locality: 

 California. 



Bromus carinatus californicus Shear, U. S. Dept. Agr. 

 Div. Agrost. Bull. 23: 60. 1900; B. carinatus densus Shear. 

 Sheaths smooth; lemmas scabrous instead of pubescent. Com- 

 mon in the southern Coast Ranges of California. Type lo- 

 cality: California. 



Bromus carinatus hookerianus (Thurb.) Shear, U. S. 

 Dept. Agr. Div. Agrost. Bull. 23: 60. /. 38. 1900; Ceratochloa 

 grandiflora Hook. Fl. Bor. Am. 2: 253. pi. 235. 1840, not 



