230 



POACEAE 



11. Bromus laevipes Shear. 



Woodland Brome-grass. Fig, 



540. 



Broiinis laevipes Shear, U. S. Dept. Agr. Div. Agrost. Bull. 

 23: 45. /. 25. 1900. 



Culms 50-100 cm. tall, the base often decumbent and 

 rooting; sheaths and blades glabrous; panicle broad, 

 lax, drooping, 15-20 cm. long, the branches slender, 

 drooping; glumes smooth, the first 3-nerved, 6-8 mm. 

 long, the second 5-nerved, 10-12 mm. long ; lemmas 

 obtuse, 7-nerved, 12-14 mm. long, densely pubescent on 

 the margin nearly to the apex and on the back at the 

 base ; awn 3-5 mm. long. 



Moist woods and shady banks, southern Washington to 

 southern California. June-Aug. Type locality: west Klicki- 

 tat County, Washington. 



12. Bromus vulgaris (Hook.) Shear. 

 Narrow-flowered Brome-grass. Fig. 541. 



Bromus pnrgans vulgaris Hook. Fl. Bor. Am. 2: 252. 1840. 

 Bromus ciliattis pauciflorus Vasey; Beal, Grasses N. Am. 2: 



619. 1896. 

 Bromus vulgaris Shear, U. S. Dept. Agr. Div. Agrost. Bull. 



23: 43. /. 24. 1900. 



Culms 80-120 cm. tall, the nodes pubescent ; 

 sheaths pilose; ligule prominent, 3-5 mm. long; 

 blades scattered, more or less pilose ; panicle open, 

 10-15 cm. long, the branches slender and drooping; 

 spikelets slender, about 2.5 cm. long ; glumes narrow, 

 sparsely pubescent, the first 1-nerved, 5-8 mm. long. 

 acute, the second 3-nerved, broader and longer than 

 the first, obtuse or acutish; lemmas 8-10 mm. long, 

 sparsely pubescent over the back, pubescent or ciliate 

 near the margins or nearly glabrous ; awn 6-8 mm. 

 long. 



Rocky woods and shady ravines, in the Transition Zone; 

 British Columbia to California and Montana. June-Aug. 

 Type locality: Columbia River. 



Bromus vulgaris eximius Shear, U. S. Dept. Agr. Div. 

 Agrost. Bull. 23: 44. 1900. Plant more robust, the sheaths 

 glabrous, the lemma nearly glabrous. Washington to Men- 

 docino County, California. Type locality: Wallowa Lake, 

 Oregon. 



Bromus vulgaris robustus Shear, U. v'^. Dept. Agr. Di\ 

 preceding variety but with pilose sheaths; jtanicle large. 

 Seaside, Oregon. 



Agrost. Bull. 23: 44. 1900. Robust like the 

 British Columbia to Oregon. Type locality: 



13. Bromus richardsoni Link. 

 Richardson's Brome-grass. Fig. 542. 



Bromus richardsoni Link, Hort. Berol. 2: 281. 1833. 

 Bromus purgans longispicatus Hook. Fl. Bor. Am. 2: 252. 



1840. 

 Bromus ciliatus scariosus Scribn. U. S. Dept. Agr. Div. 



Agrost. Bull. 13: 46. 1898. 



Plant pale green ; culms erect, smooth, 60-130 

 cm. tall; sheaths smooth or sparsely pilose; ligule 

 short and truncate, 1-2 mm. long: blades mostly 

 less than 5 mm. wide ; panicle drooping ; 10-20 cm. 

 long; spikelets 2-3 cm. long; glumes smooth, the 

 first 1-nerved, 8-10 mm. long, the second 3-nerved, 

 9-12 mm. long; lemma 12-15 mm. long, silky-villous 

 between the outer nerves and the margins nearly to 

 the apex. 



Open woods and rocky slopes, in the Canadian Zone; 

 Alaska to Arizona and Nebraska, extending into Washington 

 and eastern Oregon. June-Aug. Type locality: western 

 North America. 



The form found in our area belongs to the variety B. 

 richardsoni pdllidus (Hook.) Shear, U. S. Dept. Agr. Div. 

 Agrost. Bull. 23: 34. 1900 (S. purgans pallidus Hook. Fl. 

 Bor. Am. 2: 252. 1840), which has smaller panicles than 

 the species, narrower blades and more densely silky lemmas. 



