GRAMINEAE 41 



3. Agropyron caninum (L-) R- & S. Awned Wheat-grass. 

 Fibrous-rooted Wheat-grass. (Man. p. 153 ; I. 'P.f.^2S.) N. B. to 

 B. C, N. C, Tenn. and Colo. Also in Eu. and Asia. — Pennsylvania : 

 Monroe, Pocono Summit ; Pike. 



63. HORDEUM L. 



Flowering scales, exclusive of the awns, 6-8 mm. long. 



Awn of the flowering scale 13 mm. long or less. i. H. nodosum. 



Awn of the flowering scale 25 mm. long or more. 2. H.jubattim. 



Flowering scales, exclusive of the awns, 12 mm. long. 3. H. niurinutn. 



1. Hordeum nodosum L. Meadow Barley. (Man. p. 155; I. F. 

 f. 52g. ) In meadows and waste places, Ind. to B. C. and Alaska, Tex. 

 and Calif. Also in Eu. and Asia. — Pennsylvania : Bucks. 



2. Hordeum jubatum L- Squirrel-tail Grass. (Man. p. 155; I. 

 F. /. 5J/.) In dry soil, Ont. to Alaska, Kans. and Calif., and naturalized 

 in the east from Colorado and Quebec to Pa. — Pennsylvania : Phila- 

 delphia ; Bkrks ; Bucks. 



3. Hordeum murinum L. Wall Barley. (Man. p. 155 ; I. F./. S3^-) 

 On ballast and sparingly in waste places, southern N. Y., N. J. and Pa. 

 Also from Ariz, to Cal. Adv. or nat. from Eu. — Pennsylvania : Phila- 

 delphia. 



64. ELYMUS L. 



Empty scales narrowly subulate : spike relatively slender, i. E. striatus. 

 Empty scales linear or linear-lanceolate : spike relatively stout. 

 Flowering scales glabrous. 2. E. Virginicus. 



Flowering scales more or less pubescent. 

 Flowering scales hirsute. 3. E. Canadensis. 



Flowering scales minutely hispidulous. 4. E. glabrifolius. 



1. Blymus striatus Willd. Slender Wild Rye. (Man. p. 156; I. 

 F.y. 5JJ.) In woods and on banks, Me. and Ont. to Tenn. and Kans. — 

 Pennsylvania : Delaware ; Chester ; Northampton ; Franklin ; 

 Huntingdon ; Philadelphia ; Lancaster. 



2. ElymuB Virginicus L. Virginia Wild Rye. (Man. p. 156; I. 

 F.y. 534.) In moist soil, especially along streams, N. S. and N. B. to 

 Man., Fla. and Tex. — Pennsylvania : Delaware ; Chester ; Phila- 

 delphia ; Bucks ; Northampton ; Lancaster ; Franklin ; Blair ; 

 Erie ; Somerset ; Allegheny. 



3. Elymus Canadensis L. Nodding Wild Rye. (Man. p. 157; I. 

 F./. 535. ) On river banks, N. S. and N. B. to Alberta, Ga., Tex. and N. 

 Mex. — /i?««5j//z'a«m.- Delaware; Chester ; Philadelphia; Bucks; 

 Northampton ; Lancaster ; Bedford ; Erie ; Allegheny. 



4. Elymus glabrifolius (Vasey) Scribn. & Ball. Smooth-flowered 

 Wild Rye. (Man. p. 1043.) In rich woods or thickets. Pa. to Ga. 

 and N. Mex. Pemisylvania : Northampton, Easton. 



65. HYSTRIX Moench. 

 1. Hystrix Hystrix (L. ) Millsp. BottlE-brush Grass. (Man. p. 

 158 ; I. F. / 541. ) In rocky woods, N. B. to Ont., (ia., 111. and Minn. — 



