GRAMINEAE 39 



59. BROMUS L. 

 I/>wer empty scale i -nerved, the upper 3-nerved. 

 Annuals : stems usually less than 6 dm. tall : awn longer than the floweringf 

 scale. 

 Spikelets numerous, several on each panicle-branch : flowering scales 8- 



12 mm. long, appressed, hirsute. i. B. tectorii'in. 



Spikelets few, i or sometimes 2 on each panicle-branch : flowering scales 

 12-16 mm. long, sparingly hispidulous. 2. B. sterilis. 



Perennials : stems usually exceeding 6 dm. tall : awn shorter than the flower- 

 ing scale or wanting. 

 Flowering scales glabrous, or pubescent on the margins. 3. B. ciliatus. 

 Flowering scales densely pubescent all over the back. 4. B. purgans. 

 Lower empty scale 3-nerved, the upper 5-9-nerved. 

 Flowering scales awned. 

 Flowering scales pubescent. 

 Pubescence dense, of long silky hairs. 5. B. Kalmii. 



Pubescenceof soft, short appressed hairs, not dense. 6. B. hordeaceus. 

 Flowering scales glabrous, sometimes slightly roughened. 

 Leaf -sheaths glabrous : nerves of the turgid fruiting scales obscure. 



7. B. secalinus. 

 Leaf-sheaths softly and densely pubescent with reflexed hairs : nerves of 

 the flowering scales prominent. 8. B. racemosus. 



Flowering scales rot awned, nearly as broad as long. 9. B. brizaeformis. 



1. Bromus tectorum L. Downy Brome-grass. (Man. p. 149 ; I. 

 ^- /• 509.) In fields and waste places, R. I. to Ont., Md. and Ohio. 

 Nat. from Eu. — Pennsylvania : Northampton, streets of Easton ; Bucks, 

 Bristol. 



2. Bromus sterilis L. Barren Brome-Grass. (Man. p. 150 ; I. F. 

 f. J/o.) In waste places and ballast, eastern Mass. to Pa. and Ohio. 



Locally nat. or adv. from Eu. — Pennsylvania : Philadelphia ; Mont- 

 gomery ; Northampton, Easton. 



3. Bromus ciliatus L. Fringed Brome-grass. Wood Chess. 

 (Man. p. 149; I. F. /. 306.) In woods and moist thickets, Newf. to B. 

 C, Fla. and Tex. — Pennsylvania: Delaware; Chester; Philadel- 

 phia ; Northampton ; Lancaster ; Erie ; Fulton ; Franklin ; 

 Pike ; Wayne. 



4. Bromus purgans L- (Man. p. 149, as a subspecies.) In woods and 

 thickets. Can. and N. Eng. to Wyo., Fla. and Tex. — Pennsylvania: 

 Northampton ; Huntingdon ; Erie. 



5. Bromus Kalmii A. Gray. Kalm's Chess. (Man. p. 150 \ I. V. /. 

 512.) In moist woods and thickets, Quebec to Man., south to Mass. 

 Pa., 111. and Iowa. — Pennsylvania : Northampton ; Bucks ; Lancas- 

 ter. ; Huntingdon ; Venango. 



6. Bromus hordeaceus L. SoFT Chess. (Man. p. 150; I. F. f. 513.) 

 In fields and waste places, N. Y. to Va. Locally adv. from Eu. — Penn- 

 sylvania : Chester ; Philadelphia, ballast. 



7. Bromus secalinus L. Cheat Chess. (Man. p. 150; I. F. /. 5//.) 

 In fields and waste places almost throughout temperate N. Am. Nat. 



