278 



GRAMINEAE. 



VOL. I. 



11. Bromus hordeaceus L. Soft Chess. Fig. 672. 



Bromus hordeaceus L. Sp. PI. 77. 1753. 

 Bromus mollis L. Sp. PI. Ed. 2, 112. 1762. 



Culms 8'-3 tall, erect, often slender, usually pubes- 

 cent below the panicle. Sheaths shorter than the inter- 

 nodes, mostly pubescent; ligule i" long; blades i'-7' 

 long, i "-3" wide, pubescent; panicle generally con- 

 tracted, its branches erect or ascending, i'-2' long; spike- 

 lets appressed-pubescent, on short pedicels; empty scales 

 acute, the first 3-nerved, the second longer, 5~7-nerved ; 

 flowering scales broad, obtuse, 3^" -4-^" long, 7-Q-nerved, 

 bearing an awn 3" -4" in length between the obtuse or 

 acute teeth. 



In fields and waste places, Nova Scotia to British Colum- 

 bia, California and North Carolina. Locally adventive from 

 Europe. Soft Brome. Haver-grass. Blubber-, Hooded-, 

 Bull-, Lob- or Lop-grass. July-Aug. 



12. Bromus secalinus L. Cheat. Chess. Fig. 673. 



Bromus secalinus L. Sp. PI. 76. 1753. 



Culms i-3 tall, erect, simple, smooth and glabrous. 

 Sheaths usually shorter than the internodes, generally 

 glabrous; ligule \" long, erose; blades 2 '-9' long, i"-3" 

 wide, smooth or rough, sometimes hairy; panicle 2'-8' 

 in length, open, its branches ascending or drooping; spike- 

 lets turgid, glabrous, erect or somewhat pendulous, 6-10- 

 flowered; empty scales scabrous toward the apex, the 

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

 7-nerved, obtuse; flowering scales 3 "-4" long, broad, 

 turgid, obtuse, rough toward the apex, the nerves obscure, 

 awnless, or bearing a straight awn 4" long or less be- 

 'tween. the obtuse short teeth; palet about equalling the 

 scale. 



In fields and waste places almost throughout temperate 

 North America, often a pernicious weed in grain fields. Nat- 

 uralized from Europe. Native also of Asia. Smooth Rye- 

 brome. Cock-grass. June-Aug. 



13. Bromus racemosus L. Upright Chess. Smooth Brome-grass. Fig. 674. 



Bromus racemosus L. Sp. PL Ed. 2, 114. 1762. 

 B. committatus Schrad. Fl. Germ, i : 353. 1806. 



Culms i-3 tall, erect, simple, smooth and glabrous, 

 or sparingly pubescent below the panicle. Sheaths 

 shorter than the internodes, glabrous or pubescent ; 

 ligule i" long; blades I'-Q' long, 4 "-4" wide, pubes- 

 cent; panicle i'-io' in length, the branches erect or 

 ascending, the lower sometimes 2.\' long; spikelets 

 erect, 5-n-flowered; empty scales acute, the first 

 3-nerved, the second longer and broader, 5-p-nerved ; 

 flowering scales broad, ^"-4^" long, obtuse, smooth 

 and shining, the nerves prominent ; awn straight, 3" -4" 

 in length ; palet considerably shorter than the scale. 



In fields and waste places all over the United States and 

 British America. Naturalized from Europe. Native also 

 of Asia. June-Aug. 



