^22 i'OACE.E. 



Nearly allied to B. hreviaridatus. The itiilicized words above 

 mark the most distinctive points which separate this from B. 



(jfcridrisfatufi- 



IJocky ^louiitains, Coloi'ado to Montana. 



Var. Tweedyi Scribii. ined. 



Panicle villous, smaller, rather slender, more pubescent. 



Montana, Tweedy 5S;. 



•>1 r, ssi-KU Murr. Prod. Stirp. Gott. 42 (ITTO). B. alt is- 



,i,HHs Web. Wi-. J'riin. Fl. Hols. 9 (1780), teste Kunth. Fe^Uica 

 a.prnt M. &. K. Deutsch. Fl. 1 : 07-2 (IS:>:5). 



An erect annual or perennial, 00-150 cm. high. Sheaths 

 clotlu'd more or less with relloxed hairs; ligule short; blades 5-0, 

 iUit, scabrous or thinly pubescent, 3-4 cm. long, 5-8 mm. wide. 

 Panicle open. 8-15 cm. long, lowest rays scabrous, mostly m^ twos 

 ami threes, the longest 8-10 cm. long, branched sparingly. Spike- 

 lets ol)U.ng or lanceolate, compressed, O-lO-ilowered, 2-3 cm. 

 Ion.-, joint or rachilla scabrid, with few iiairs, 3.5 nun. long ; 

 lirst enu.ty glume lanceolate, 1-nerved, mm. long, second oval- 

 lanceolate, 3-nerved, 9 mm. long, with the apex mucronate; 

 iloral glume scabrid, hairy, elliptical-lanceolate, 5-7-nerved, 13 

 1 nn. long including the very short teeth, awn 5-8 mm. long; palea 

 narrowly ol^lanceolate, short-ciliato on the keels, 9-10 mm. long. 

 Michigan (near Lansing), Bailey in 1880. 

 Introduced from Europe. 



22. B. Orcuttianus Vasey, Coult. Bot. Caz. 10:223 (1885). 

 An erect perennial, leafy below, scabrous above, 90-120 cm. 

 hi<rh; nodes pubescent. Sheaths pubescent; Hguie firm, 1 mm. 

 long; blades 4, besides several crowded near tlie base of the culm, or 

 8 cm tall plants from the forest, erect, firm, nearly smooth, 10-15- 

 30 cm. long, 5-9 mm. wide. Panicle erect, thin, 10-15 cm. long, 

 ravs in twos and threes, the longest 3-5 cm. long, not including 

 the 2-3 spikclets, spreading. Spikelets 4-8-fiowered, longest jomt 

 of rachilla scabrous, 3.5 mm. long, first empty glume linear, acute, 

 1-3-nerved, 7 mm. long, secoiul Ihiear, almost acute, 3-nerved, 9- 

 11 mm. long; floral glume scabrous-pubescent, round on the back, 

 lance-elliptical, 5-7-nerved, 10-12 mm. long, apex entire, obtuse, 



